The Experts below are selected from a list of 1455 Experts worldwide ranked by ideXlab platform
Hiroshi Ehara - One of the best experts on this subject based on the ideXlab platform.
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Sago Palm (Metroxylon sagu Rottb.) response to drought condition in terms of leaf gas exchange and chlorophyll a fluorescence
Plant Production Science, 2020Co-Authors: Aidil Azhar, Barahima Abbas, Daigo Makihara, Hitoshi Naito, Koki Asano, Mai Takagi, Saeka Unoki, Rena Tomita, Hiroshi EharaAbstract:Sago Palm (Metroxylon sagu Rottb.) photosynthetic performance was evaluated under drought conditions through leaf gas exchange and chlorophyll a fluorescence measurement. Drought has an impact on s...
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evaluating Sago Palm metroxylon sagu rottb photosynthetic performance in waterlogged conditions utilizing pulse amplitude modulated pam fluorometry as a waterlogging stress indicator
Journal of the Saudi Society of Agricultural Sciences, 2020Co-Authors: Daigo Makihara, Aidil Azhar, Hitoshi Naito, Hiroshi EharaAbstract:Abstract Photosynthetic performance of Sago Palm (Metroxylon sagu Rottb.) was evaluated in normal and waterlogged conditions. Net assimilation rate (AN), light response curve of net assimilation rate (AN/I) and pulse-amplitude modulation fluorescence vs. irradiance (PAM/I), leaf water potential, leaf chlorophyll content and leaflet area were measured. AN was higher in a particular period of waterlogging than in the normal condition. However, prolonged waterlogging (more than two months) negatively affected Sago Palm photosynthetic capacity. This was indicated by reduction in several photosynthetic parameters such as AN, maximum value of AN obtained at maximum irradiance (AN (Imax)), quantum yield at zero to 200 µmol m−2 s−1 irradiance (ϕ(Io_I200)), asymptotic photosynthetic efficiency (αo), and maximum electron transport rate (ETRmax). The plants experiencing waterlogging produced high qNmax and NPQmax values. Prolonged waterlogging period also caused significant reduction in leaf water potential (ψleaf) and photosynthetic pigments content. Normal soil conditions with a sufficient amount of water are preferable in order for the plant to generate higher photosynthetic capacity and facilitate stable Sago production.
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photosynthesis of Sago Palm metroxylon sagu rottb seedling at different air temperatures
Agriculture, 2018Co-Authors: Aidil Azhar, Daigo Makihara, Hitoshi Naito, Hiroshi EharaAbstract:Photosynthetic activities of the Sago Palm ( Metroxylon sagu Rottb.) were studied to find out its sensitivity to changes in ambient air temperature. The minimum ambient air temperature designed for the experiment was 25–29 °C, while the higher end was 29–33 °C. Several photosynthetic parameters were studied to support our analysis in Sago photosynthetic activity, including diurnal leaf gas exchange, assimilation rate vs. CO 2 concentration, leaf greenness, leaf chlorophyll content, and photosynthetic rate vs. irradiance. We found that Sago Palm photosynthetic activity tends to be more sensitive to minimum than to maximum ambient air temperature. The plants exposed to higher air temperatures had dark green leaf color associated with higher rates of diurnal photosynthesis, chlorophyll content, and rubisco limited photosynthetic activity. They also exhibited higher trend in optimum irradiance absorption level. Consequently, maximum light energy dissipation occurred at higher temperatures.
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Sago Palm: Multiple Contributions to Food Security and Sustainable Livelihoods
2018Co-Authors: Hiroshi Ehara, Yukio Toyoda, Dennis V. JohnsonAbstract:This open access book addresses a wide variety of events and technologies concerning the Sago Palm, ranging from its botanical characteristics, culture and use to social conditions in the places where it is grown, in order to provide a record of research findings and to benefit society. It discusses various subjects, including the Sago Palm and related species; differentiation of species of starch-producing Palm; habitat, morphological, physiological and growth characteristics; culture and management; productivity of carbon dioxide; starch extraction and manufacture; characteristics and utilization of starch; and cultural anthropological and folkloristic aspects. Problems such as food shortages due to increasing populations, global warming and climate change, and decreasing reserves of oil and other underground resources, have become more pressing in recent years. In the context of these problems, the book examines the role of the Sago Palm in sustainable food production, in the manufacture of other foodstuffs, as a raw material for ethanol and in the manufacture of biodegradable plastics. In addition to academics, this book will be useful to researchers and government officials working for international agencies, national governments, municipalities, and other research organizations; technicians, researchers, managers, entrepreneurs, and others working in industries such as agriculture, plant production, food production, manufacturing, chemical engineering, energy production, and distribution.
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Sago Palm: Multiple Contributions to Food Security and Sustainable Livelihoods
Springer Nature, 2018Co-Authors: Hiroshi Ehara, Dennis V. Johnson, Yukio ToyodaAbstract:This book addresses a wide variety of events and technologies concerning the Sago Palm, ranging from its botanical characteristics, culture and use to social conditions in the places where it is grown, in order to provide a record of research findings and to benefit society. It discusses various subjects, including the Sago Palm and related species; differentiation of species of starch-producing Palm; habitat, morphological, physiological and growth characteristics; culture and management; productivity of carbon dioxide; starch extraction and manufacture; characteristics and utilization of starch; and cultural anthropological and folkloristic aspects.Problems such as food shortages due to increasing populations, global warming and climate change, and decreasing reserves of oil and other underground resources, have become more pressing in recent years. In the context of these problems, the book examines the role of the Sago Palm in sustainable food production, in the manufacture of other foodstuffs, as a raw material for ethanol and in the manufacture of biodegradable plastics. In addition to academics, this book will be useful to researchers and government officials working for international agencies, national governments, municipalities, and other research organizations; technicians, researchers, managers, entrepreneurs, and others working in industries such as agriculture, plant production, food production, manufacturing, chemical engineering, energy production, and distribution
Barahima Abbas - One of the best experts on this subject based on the ideXlab platform.
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Adaptive Evolution and Addressing the Relevance for Genetic Improvement of Sago Palm Commodity
Genetic Diversity [Working Title], 2020Co-Authors: Barahima AbbasAbstract:Adaptive evolution implies evolutionary shifts within an organism which make it suitable and adaptable for its environment. Genetic resources of Sago Palm (Metroxylon sagu Rottb.) populations in Indonesia were explicated as follows: (1) Characters of Sago Palm in Indonesia were shown varied based on cpDNA markers and large variation based on RAPD markers. (2) Variation of starch production of Sago Palm correlated with Wx genes variation, (3) Distances barrier and geographies isolation in line of Sago Palm dispersions in Indonesia (4) Characteristics of genetic were observed does not related with vernacular names those were given by local people (5) Papua islands, Indonesia territorial is proposed the center of Sago Palm diversities, (6) Papua islands, Sulawesi islands and Kalimantan islands will be the provenance of the diversities (7) Genetic improvement of Sago Palm might enhanced using molecular marker that link to interesting genes by developing marker-assisted breeding.
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Sago Palm (Metroxylon sagu Rottb.) response to drought condition in terms of leaf gas exchange and chlorophyll a fluorescence
Plant Production Science, 2020Co-Authors: Aidil Azhar, Barahima Abbas, Daigo Makihara, Hitoshi Naito, Koki Asano, Mai Takagi, Saeka Unoki, Rena Tomita, Hiroshi EharaAbstract:Sago Palm (Metroxylon sagu Rottb.) photosynthetic performance was evaluated under drought conditions through leaf gas exchange and chlorophyll a fluorescence measurement. Drought has an impact on s...
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Genetic diversity of Sago Palm (Metroxylon sagu) accessions based on plastid cpDNA matK gene as DNA barcoding
Biodiversitas Journal of Biological Diversity, 2019Co-Authors: Barahima Abbas, Ihwan Tjolli, MunartiAbstract:Abstract. Abbas B, Tjolli I, Munarti. 2020. Genetic diversity of Sago Palm (Metroxylon sagu) accessions based on plastid cpDNA matK gene as DNA barcoding. Biodiversitas 21: 219-225. Metroxylon sagu Rottb is one of the plant species including in the Palmae family that deposits starch in the trunk. Sago Palm was reported has high capability to produce a large amount of starch and large variation starch qualities which were mostly influenced by genetic factors. The objectives of this study are revealed sequence chloroplast DNA (cpDNA) associated with matK genes for the genetic diversity identification of Sago Palm accessions. Plant materials used in the studies were derived from Sago Research Center (SRC) collection. DNA extraction has adopted the procedure of Plant Genomic DNA Mini Kit. Polymerase chain reaction (PCR) was performed by using primer sets of MatK-1RKIM-f and MatK-3FKIM-r. DNA PCR product was sequenced by the 1st Base Asia, Singapore. Results of the study showed that the cpDNA sequence associated with matK genes in the genome of Sago Palm showed differences among accessions. Molecular diversities of Sago Palm accessions based on matK gene showed Sago Palm accessions separated into two genotypes. Genotype-1 incorporated of ten individuals of 15 accessions and genotype-2 incorporated five individuals of 15 accessions. A mutation site and deletion site occurred in the sequences of matK gene of the Genotype-2. Ten of the 15 sequences of the matK gene (belong to Genotype-1) were registered in the GenBank, NCBI as DNA barcoding and authenticity of Sago Palm germplasm from Papua islands, Indonesia territorials.
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Phylogenetic of Sago Palm (Metroxylon sagu) and others monocotyledon based on mitochondrial nad2 gene markers
Biodiversitas, 2019Co-Authors: Barahima Abbas, Ihwan Tjolli, Muhammad Dailami, MunartiAbstract:Abstract. Abbas B, Tjolli I, Dailami M, Munarti. 2019. Phylogenetic of Sago Palm (Metroxylon sagu) and others monocotyledon based on mitochondrial nad2 gene markers. Biodiversitas 20: 2249-2256. Sago Palm forest and Sago Palm semi cultivated are found in the Papua islands as well as Ambon and Seram islands. The diversity center of Sago Palm is found in the Papua Islands. The objectives of this study are revealed sequence DNA mitochondrial associated with nad2 genes in Sago Palm accessions and molecular phylogenetic of Sago Palm and other monocotyledon plants. Plant materials used in the studies were derived from Sago Research Center (SRC) and sequencing and other monocotyledon were retrieved from the GenBank, NCBI accessions. Young fresh leaflets were derived from the experimental field of SRC and DNA extraction by following the procedure of Plant Genomic DNA Mini Kit and then PCR performed by using nad2 primer sets. Thereafter, DNA PCR product was sequenced by Macrogen Inc., Seoul, Korea. Sequences of nad2 genes in Sago Palm accessions from Papua, Indonesia were registered by GenBank NCBI for further used in the future as biological authenticity from the certain location. Mitochondrial DNA sequences associated with nad2 genes in the genome of Sago Palm were shown no differences among Sago Palm accessions. Molecular phylogenetic of Sago Palm and others monocotyledon based on nad2 gene markers showed the Sago Palm and others monocotyledon incorporated into two major clades and five subclades. Sago Palm, coconut, and date Palm were described as close related and being in the same subclades.
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short communication a comparative study of phenotypes and starch production in Sago Palm metroxylon sagu growing naturally in temporarily inundated and non inundated areas of south sorong indonesia
Biodiversitas, 2019Co-Authors: Tomas Yater, Herman Wafom Tubur, Cipta Meliala, Barahima AbbasAbstract:Abstract. Yater T, Tubur HW, Meliala C, Abbas B. 2019. Short Communication: A comparative study of phenotypes and starch production in Sago Palm (Metroxylon sagu) growing naturally in temporarily inundated and non-inundated areas of South Sorong, Indonesia. Biodiversitas 20: 1121-1126. Sago Palm forests and Sago Palm semi cultivation are generally spread in swampy areas, seasonally inundated areas and non-inundated areas. The objectives of this study are to determine and compare the phenotypes of and starch production by Sago Palms growing naturally in the temporarily inundated areas (TIA type) and non-inundated areas (WIA type) in South Sorong District, West Papua Province, Indonesia. Sago Palms of both habitats were found to be the same variety based on analysis of vernacular names and general characteristics. Comparison of morphological characters related to starch production of TIA and WIA types showed that there were no significant differences between the two studied types. The distribution of starch along the Sago trunk was observed to be uneven, higher starch accumulation was found in the middle part of the trunk which was significantly different from the lower and upper parts of the trunk.
Yusuke Goto - One of the best experts on this subject based on the ideXlab platform.
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growth behavior of suckers derived from transplanted Sago Palm metroxylon sagu rottb
Plant Production Science, 2016Co-Authors: Keita Nabeya, Takayuki Nakajima, Satoshi Nakamura, Yusuke GotoAbstract:AbstractDuring the growth of Sago Palm (Metroxylon sagu Rottb.), primary suckers appear from the main stem (MS) of transplanted suckers. Then, secondary suckers appear from the primary suckers. After the MS (trunk) is first harvested 10 and several years after transplantation, trunks can be harvested persistently using the primary, secondary, and subsequent suckers, which are designated as derivative suckers, growing with the MS. However, little knowledge exists about the growth behavior of derivative suckers. This study clarified how derivative suckers, especially the primary and secondary suckers, spread in the horizontal direction, and how they form a plant with the MS during the creeping growth stage. Most derivative suckers crept in the direction of about 70° subtended by the mother stem. However, two primary suckers that appeared early after transplantation crept in an obtuse angle to the creeping direction of the MS. As the reason for this obtuse angle direction, we considered the following four fa...
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growth behavior of Sago Palm metroxylon sagu rottb from transplantation to trunk formation
Plant Production Science, 2015Co-Authors: Keita Nabeya, Teiji Nakamura, Youji Nitta, Manabu Watanabe, Takayuki Nakajima, Akihiro Fujii, Satoshi Nakamura, Yusuke GotoAbstract:AbstractBecause of the large amounts of starch accumulated in its trunk, the Sago Palm (Metroxylon sagu Rottb.) growing in tropical areas of Southeast Asia has received much attention as a starch crop mainly for use as an industrialraw material. Sago Palm propagates generally by transplantation of suckers, but little agronomical knowledge is available for transplanted sucker growth. Our objectives are to clarify Sago Palm growth after transplantation and to assess the transition of stem growth from horizontal to vertical. The transplanted sucker stems elongate horizontally, creeping along the ground surface in the early growth stage. Subsequently, the stem elongation shifts gradually from horizontal to vertical. The creeping stem stands up, drawing a large arc and elongating vertically. The horizontal stem elongation stops at around 6.5 years after transplantation and the stem growth curve shows a sigmoidal curve. The stem growth stage of a transplanted sucker is divisible into three stages based on its e...
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position and development of differentiated lateral buds in Sago Palm metroxylon sagu rottb
Plant Production Science, 2015Co-Authors: Keita Nabeya, Satoshi Nakamura, Yusuke GotoAbstract:Abstract:During Sago Palm cultivation, many suckers appear from the mother stem as it grows. Some suckers are thinned out, but the rest are left to grow to be harvested several years later after harvesting of the mother stem (trunk). Proper management of the suckers from the mother stem is important to obtain successive Sago trunks from a single transplantation. Nevertheless, little scientific knowledge exists about the sucker growth, even the development of its primordium. Our objective is to clarify the differentiation position and the development of the Sago Palm lateral bud, which is the sucker bud. Results show that in Sago Palm, the sucker bud differentiates inside of the connate part of the leaf petiole, which is opposite to the axil side. Swelling of tissue is first visible inside of the third leaf from the growth point (rbL 3). Sucker bud initiation is visible at almost all leaf positions lower than rbL 5. Furthermore, at each leaf position, one or two (rarely three) buds are observed. Differenti...
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a method for estimating Sago Palm metroxylon sagu rottb leaf area after trunk formation
Plant Production Science, 2009Co-Authors: Satoshi Nakamura, Youji Nitta, Manabu Watanabe, Yusuke GotoAbstract:It is important to measure the individual leaf area and leaf area index (LAI) of Sago Palm (Metroxylon sagu Rottb.) to determine the appropriate planting density and maintain populations that are highly productive with regard to starch production. However, the accurate estimation of Sago leaf area from the entire leaf profile or the projecting area of the plant is not possible. Thus, we developed a method for estimating leaf area of Sago Palm after trunk formation by integrating the leaflet areas. All leaflets were diagrammatically converted to rectangles, each having the same area as that of the corresponding leaflet, and these rectangles were arranged on the rachis to initiate the shape of a leaf without overlapping leaflets and gaps between their bases and between their tips. The leaf shape thus produced by the arrangement of these rectangles was represented as ellipsoidal in the apical half and as trapezoidal in the basal half. The ratios of the estimated to the actually measured area of the apical and the basal half of the leaf were 99-107% and 94-108%, respectively. The ratio of the estimated area of the whole leaf to the measured area was 98-104%. From these results, the method for estimating the whole leaf area by converting the leaflets diagrammatically to rectangles, and calculating the area as the sum of the ellipsoidal apical half and trapezoidal basal half, is considered to be accurate and simple.
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Leaf Characteristics and Shape of Sago Palm (Metroxylon sagu Rottb.) for Developing a Method of Estimating Leaf Area
Plant Production Science, 2004Co-Authors: Satoshi Nakamura, Youji Nitta, Yusuke GotoAbstract:We aimed to determine the orientation for developing the method to estimate leaf area of Sago Palm (Metroxylon sagu Rottb.) by extracting characteristics that might be related to estimating leaf area from characteristics of leaves. Plants of around two years after trunk formation at a Sago Palm farm in Sarawak, Malaysia were used for the investigation. In a plant with eleven living leaves, the length of the unfolded leaf blade ranged from 6.0 to 7.2 m; the length of a petiole ranged from 1.8 to 3.1 m. The number of leaflets on the left side of a leaf viewing adaxial leaf surface with the tip upward was larger than that on the right side by 1-5 leaflets in all leaves. The lowest leaflet of a leaf was on the left side in all leaves. The relative position of the lowest leaflet on the rachis was related to the way a leaf was folded in a plant. The length, width and area of the right and the left leaflets were compared on the basis of their position on a rachis. They had approximately the same dimensions. This fact implied that those characteristics were almost symmetric with respect to the rachis; therefore, the position of a leaflet on a rachis was considered to be an important characteristic for analyzing leaf area. We drew a leaf diagram based on the measured data and examined a method of estimating leaf area using the leaf outline, but the method was not suitable. We decided to examine a method to integrate the leaflet areas for accurate estimation of the leaf area.
Hitoshi Naito - One of the best experts on this subject based on the ideXlab platform.
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Sago Palm (Metroxylon sagu Rottb.) response to drought condition in terms of leaf gas exchange and chlorophyll a fluorescence
Plant Production Science, 2020Co-Authors: Aidil Azhar, Barahima Abbas, Daigo Makihara, Hitoshi Naito, Koki Asano, Mai Takagi, Saeka Unoki, Rena Tomita, Hiroshi EharaAbstract:Sago Palm (Metroxylon sagu Rottb.) photosynthetic performance was evaluated under drought conditions through leaf gas exchange and chlorophyll a fluorescence measurement. Drought has an impact on s...
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evaluating Sago Palm metroxylon sagu rottb photosynthetic performance in waterlogged conditions utilizing pulse amplitude modulated pam fluorometry as a waterlogging stress indicator
Journal of the Saudi Society of Agricultural Sciences, 2020Co-Authors: Daigo Makihara, Aidil Azhar, Hitoshi Naito, Hiroshi EharaAbstract:Abstract Photosynthetic performance of Sago Palm (Metroxylon sagu Rottb.) was evaluated in normal and waterlogged conditions. Net assimilation rate (AN), light response curve of net assimilation rate (AN/I) and pulse-amplitude modulation fluorescence vs. irradiance (PAM/I), leaf water potential, leaf chlorophyll content and leaflet area were measured. AN was higher in a particular period of waterlogging than in the normal condition. However, prolonged waterlogging (more than two months) negatively affected Sago Palm photosynthetic capacity. This was indicated by reduction in several photosynthetic parameters such as AN, maximum value of AN obtained at maximum irradiance (AN (Imax)), quantum yield at zero to 200 µmol m−2 s−1 irradiance (ϕ(Io_I200)), asymptotic photosynthetic efficiency (αo), and maximum electron transport rate (ETRmax). The plants experiencing waterlogging produced high qNmax and NPQmax values. Prolonged waterlogging period also caused significant reduction in leaf water potential (ψleaf) and photosynthetic pigments content. Normal soil conditions with a sufficient amount of water are preferable in order for the plant to generate higher photosynthetic capacity and facilitate stable Sago production.
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photosynthesis of Sago Palm metroxylon sagu rottb seedling at different air temperatures
Agriculture, 2018Co-Authors: Aidil Azhar, Daigo Makihara, Hitoshi Naito, Hiroshi EharaAbstract:Photosynthetic activities of the Sago Palm ( Metroxylon sagu Rottb.) were studied to find out its sensitivity to changes in ambient air temperature. The minimum ambient air temperature designed for the experiment was 25–29 °C, while the higher end was 29–33 °C. Several photosynthetic parameters were studied to support our analysis in Sago photosynthetic activity, including diurnal leaf gas exchange, assimilation rate vs. CO 2 concentration, leaf greenness, leaf chlorophyll content, and photosynthetic rate vs. irradiance. We found that Sago Palm photosynthetic activity tends to be more sensitive to minimum than to maximum ambient air temperature. The plants exposed to higher air temperatures had dark green leaf color associated with higher rates of diurnal photosynthesis, chlorophyll content, and rubisco limited photosynthetic activity. They also exhibited higher trend in optimum irradiance absorption level. Consequently, maximum light energy dissipation occurred at higher temperatures.
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Growth Response and Nutrient Concentrations of Sago Palm under Aluminum Stress
Thammasat International Journal of Science and Technology, 2014Co-Authors: Ornprapa Anugoolprasert, Hiroshi Ehara, Hitoshi NaitoAbstract:Abstract The growth response, nutrient concentrations in different plant parts and some physiological features under Al treatment were investigated to evaluate the Al resistance of Sago Palm under acidic conditions. Seedlings at the 7th leaf stage were used for the treatment of 0, 10, 20, 100 and 200 ppm Al in culture solution at pH 3.6 for 4.5 months. The study revealed that the growth of Sago Palm increased at low Al concentrations in the growth media under acidic conditions. This result might be attributed to a positive effect on the uptake of major nutrients, such as P, N and Ca 2+ . Nevertheless, the total dry weight and leaflet area significantly decreased under the 200 ppm Al treatment. This result might be associated with a significant decrease of the Ca 2+ and Mg 2+ uptake. The critical value at which the growth of Sago Palm was inhibited is considered to be approximately 200 ppm Al in the growth media. In addition, Sago Palm maintains a low Al 3+ concentration in the leaflets by storing Al 3+ mainly in the roots, especially in the lateral roots, and the Al 3+ concentration in the whole plant did not increase significantly even under the 200 ppm Al treatment. We conclude that Al resistance of Sago Palm might be due to the avoidance mechanism via the Al exclusion ability under acidic condition. Keywords : acidic condition; aluminum resistance; nutrient accumulation; physiological characteristic; Sago Palm.
Akira Watanabe - One of the best experts on this subject based on the ideXlab platform.
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methane and co2 fluxes from an indonesian peatland used for Sago Palm metroxylon sagu rottb cultivation effects of fertilizer and groundwater level management
Agriculture Ecosystems & Environment, 2009Co-Authors: Akira Watanabe, Ken-ichi Kakuda, Ho Ando, Benito Heru Purwanto, Foh-shoon JongAbstract:Abstract Tropical peatland is a vast potential land source for biological production, but peatland is a major natural source of greenhouse gases, especially methane (CH 4 ). It is important to evaluate the changes in greenhouse gas emissions induced by cultivation practices for sustainable agricultural use of tropical peatland. We investigated the effects of fertilizer application and the groundwater level on CH 4 and carbon dioxide (CO 2 ) fluxes in an Indonesian peat soil. The crop cultivated was Sago Palm ( Metroxylon sagu Rottb.), which can grow on tropical peat soil without drainage and yield great amounts of starch. CH 4 emission through Sago Palm plants was first estimated by collecting gas samples immediately after cutting Sago suckers using the closed chamber method. The CH 4 fluxes ranged from negative values to 1.0 mg C m −2 h −1 . The mean CH 4 flux from treatment with macroelements (N, P, and K) and microelements (B, Cu, Fe, and Zn) applied at normal rates did not differ significantly from that of the No fertilizer treatment, although increasing the application rates of macroelements or microelements by 10-fold increased the CH 4 flux by a factor of two or three. The relationship between CH 4 flux and the groundwater table was regressed to a logarithmic equation, which indicated that to maintain a small CH 4 flux, the groundwater table should be maintained at 2 fluxes ranged between 24 and 150 mg C m −2 h −1 , and were not significantly affected by either fertilizer treatments or the groundwater level. The inclusion of Sago Palm suckers in a chamber increased CH 4 emission from the peat soil significantly. Thus, gas emissions mediated by certain kinds of Palm plants should not be disregarded.
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Effect of Sago Palm (Metroxylon sagu Rottb.) cultivation on the chemical properties of soil and water in tropical peat soil ecosystem
Nutrient Cycling in Agroecosystems, 2009Co-Authors: Etsuko Miyamoto, Ken-ichi Kakuda, Ho Ando, Sachi Matsuda, Foh-shoon Jong, Akira WatanabeAbstract:Tropical peatland is a potential land resource for crop production to supply food and energy sources to increasing population. Although Sago Palm ( Metroxylon sagu Rottb.) is a potential starch crop suited to this purpose, prefer control of groundwater level and fertilizer application should be done to maintain the high starch productivity. As it is also important to estimate the impact of Sago Palm cultivation on the environment from the view point of the sustainability, we investigated temporal changes in the chemical properties of drainage water and soil in a Sago Palm plantation in Indonesia. Analysis of canal water from blocks with different Palm ages during a 2-year period suggested small increases in Ca, K, and Mg concentrations with time (up to 8 years). No time-dependent changes were observed in the concentrations of other nutritional/toxic elements, although the larger concentration in groundwater below Sago Palm than in canal water was observed for fertilizer components including B, Ca, P, and Zn. Although large portions of Al, Fe, and Zn in canal water were interacted with dissolved organic C (DOC), the leaching of DOC did not vary with the development of Palm growth. Contents of nutritional elements were generally similar among soils at 1, 3, and 5 m away from a Palm, among soils at 0.1, 0.3, and 0.5 m depths, and between soils in Sago Palm block and adjacent secondary forest, regardless of plant age. Thus, the Sago Palm cultivation with fertilizer and groundwater level control did not induce notable deterioration of soil and water qualities.
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effects of fertilizer application on the root and aboveground biomass of Sago Palm metroxylon sagu rottb cultivated in peat soil
Japanese journal of tropical agriculture, 2005Co-Authors: Ken-ichi Kakuda, Ho Ando, Akira Watanabe, Foh-shoon JongAbstract:In previous studies, fertilizer application to Sago Palms cultivated in peat soils did not appreciably improve the growth of Sago Palm. We applied ca. 1 times the general rates of nutrients (N, P, K, Ca, Mg, Cu, Zn, Fe and B) to Sago Palm cultivated in peat soils at Riau, and evaluated the response of the roots and aboveground biomass during the 16 months period following the fertilization (2 dry seasons and 1 wet season). The dry weight of the Sago Palm roots with fertilizer was smaller than that at the onset of the experiment, whereas the Sago roots without fertilizer was similar in dry weight to the initial ones. The response of the aboveground biomass to fertilization differed among organs, i.e., the dry weights of the leaves, rachis, and trunk did not differ significantly between the Palms with and without fertilizer application, while those of petioles and suckers were significantly greater in the Palms with fertilizer. The percentage of the dry weight of mother Palm in the total dry weight decreased linearly with increasing the dry weight of suckers, which ranged from 74% to 57% for the Palms with fertilizer versus from 85% to 79% for the Palms without fertilizer. This observation indicates that the application of fertilizer accelerated the accumulation of dry matter in suckers rather than in mother Palm.
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nutrient availability and response of Sago Palm metroxylon sagu rottb to controlled release n fertilizer on coastal lowland peat in the tropics
Soil Science and Plant Nutrition, 2002Co-Authors: Benito Heru Purwanto, Jong Foh Shoon, Ken-ichi Kakuda, Ho Ando, Yoshinori Yamamoto, Akira Watanabe, Tetsushi YoshidaAbstract:Abstract Sago Palms (Metroxylon sagu Rottb.) growing on peat soils were found to grow more slowly and to show a lower production than Palms growing on mineral soils. This difference was related to the physical and chemical constraints of peat soils, which include low bulk density, high acidity, and low N, P, K, Ca, Zn, and Cu levels. In coastal lowland peat soils, the distance from the sea has been found to be an important determinant of soil elemental composition. We predicted that a sufficient supply of N at the rosette stage would improve Sago Palm growth and that the availability of N in soil to which controlled release N fertilizer was applied might be higher than that in soil treated with soluble fertilizer. To investigate the changes in the nutrient composition of peat soils at various distances from the sea and the effect on Sago Palm growth, we studied Sago Palm areas in Indonesia and Malaysia. To observe the influence of N on the growth performance, we also conducted a fertilizer experiment on c...
