The Experts below are selected from a list of 171 Experts worldwide ranked by ideXlab platform

M. M. Català - One of the best experts on this subject based on the ideXlab platform.

  • Effect of fertilising with pig slurry and chicken manure on GHG emissions from Mediterranean paddies
    Science of The Total Environment, 2016
    Co-Authors: S.c. Maris, M.r. Teira-esmatges, Àngela D. Bosch-serra, B. Moreno-garcía, M. M. Català
    Abstract:

    Soil Fertilisation affects greenhouse gas emissions. The objective of this study was to compare the effect of different Fertilisation strategies on N2O, CH4 emissions and on ecosystem respiration (CO2 emissions), during different periods of rice cultivation (rice crop, postharvest period, and seedling) under Mediterranean climate. Emissions were quantified weekly by the photoacoustic technique at two sites. At Site 1 (2011 and 2012), background treatments were 2 doses of chicken manure (CM): 90 and 170kgNH4(+)-Nha(-1) (CM-90, CM-170), urea (U, 150kgNha(-1)) and no-N (control). Fifty kilogram N ha(-1) ammonium sulphate (AS) were topdress applied to all of them. At Site 2 (2012), background treatments were 2 doses of pig slurry (PS): 91 and 152kgNH4(+)-Nha(-1) (PS-91, PS-152) and ammonium sulphate (AS) at 120kgNH4(+)-Nha(-1) and no-N (control). Sixty kilogram NH4(+)-Nha(-1) as AS were topdress applied to AS and PS-91. During seedling, global warming potential (GWP) was ~3.5-17% of that of the whole rice crop for the CM treatments. The postharvest period was a net sink for CH4, and CO2 emissions only increased for the CM-170 treatment (up to 2MgCO2ha(-1)). The GWP of the entire rice crop reached 17Mg CO2-eqha(-1) for U, and was 14 for CM-170, and 37 for CM-90. The application of PS at agronomic doses (~170kgNha(-1)) allowed high yields (~7.4Mgha(-1)), the control of GWP (~6.5MgCO2-eqha(-1)), and a 13% reduction in greenhouse gas intensity (GHGI) to 0.89kgCO2-eqkg(-1) when compared to AS (1.02kgCO2-eqkg(-1)).

Bożena Bogucka - One of the best experts on this subject based on the ideXlab platform.

  • The influence of nitrogen and potassium Fertilisation on the content of polyphenolic compounds and antioxidant capacity of coloured potato
    Journal of Food Composition and Analysis, 2016
    Co-Authors: Anna Michalska, Aneta Wojdyło, Bożena Bogucka
    Abstract:

    Abstract The effect of Fertilisation rates of nitrogen: 0 (control treatment—no Soil Fertilisation), 40, 80 and 120 kg/ha and potassium: 0 (control treatment), 120, 150 and 180 kg/ha on the content of anthocyanins, phenolic acids and antioxidant capacity in purple–blue potato cv. ‘Blue Congo’ was examined. Anthocyanins and phenolic acids were identified and quantified by LC–MS and UPLC–PDA. Nitrogen was more effective in increasing the anthocyanin content—their quantity in tubers after nitrogen application was twice as much as that found after potassium application. Among phenolic acids, the dominant one was chlorogenic acid, the content of which significantly increased after nitrogen Fertilisation at 120 kg/ha, in line with the increase in total concentration of phenolic acids and antioxidant capacity. The adjustment of nitrogen and potassium Fertilisation levels during the growth of purple–blue potatoes seems to be an effective way to increase the expression of polyphenolic compounds in these cultivars. Therefore, Fertilisation with N at 120 kg/ha and K at 120 and 150 kg/ha is recommended as a way to improve the content of biologically active compounds and antioxidant properties, and consequently, to enhance the nutritional value and the functionality of purple–blue potatoes.

S.c. Maris - One of the best experts on this subject based on the ideXlab platform.

  • Effect of fertilising with pig slurry and chicken manure on GHG emissions from Mediterranean paddies
    Science of The Total Environment, 2016
    Co-Authors: S.c. Maris, M.r. Teira-esmatges, Àngela D. Bosch-serra, B. Moreno-garcía, M. M. Català
    Abstract:

    Soil Fertilisation affects greenhouse gas emissions. The objective of this study was to compare the effect of different Fertilisation strategies on N2O, CH4 emissions and on ecosystem respiration (CO2 emissions), during different periods of rice cultivation (rice crop, postharvest period, and seedling) under Mediterranean climate. Emissions were quantified weekly by the photoacoustic technique at two sites. At Site 1 (2011 and 2012), background treatments were 2 doses of chicken manure (CM): 90 and 170kgNH4(+)-Nha(-1) (CM-90, CM-170), urea (U, 150kgNha(-1)) and no-N (control). Fifty kilogram N ha(-1) ammonium sulphate (AS) were topdress applied to all of them. At Site 2 (2012), background treatments were 2 doses of pig slurry (PS): 91 and 152kgNH4(+)-Nha(-1) (PS-91, PS-152) and ammonium sulphate (AS) at 120kgNH4(+)-Nha(-1) and no-N (control). Sixty kilogram NH4(+)-Nha(-1) as AS were topdress applied to AS and PS-91. During seedling, global warming potential (GWP) was ~3.5-17% of that of the whole rice crop for the CM treatments. The postharvest period was a net sink for CH4, and CO2 emissions only increased for the CM-170 treatment (up to 2MgCO2ha(-1)). The GWP of the entire rice crop reached 17Mg CO2-eqha(-1) for U, and was 14 for CM-170, and 37 for CM-90. The application of PS at agronomic doses (~170kgNha(-1)) allowed high yields (~7.4Mgha(-1)), the control of GWP (~6.5MgCO2-eqha(-1)), and a 13% reduction in greenhouse gas intensity (GHGI) to 0.89kgCO2-eqkg(-1) when compared to AS (1.02kgCO2-eqkg(-1)).

Karen Manquiancerda - One of the best experts on this subject based on the ideXlab platform.

  • distribution of contaminant trace metals inadvertently provided by phosphorus fertilisers movement chemical fractions and mass balances in contrasting acidic Soils
    Environmental Geochemistry and Health, 2018
    Co-Authors: Mauricio Molinaroco, Mauricio Escudey, Monica Antilen, Nicolas Arancibiamiranda, Karen Manquiancerda
    Abstract:

    The frequent use of phosphorus (P) fertilisers accompanied by nitrogen and potassium sources may lead to a serious long-term environmental issue because of the presence of potentially hazardous trace metals (TM) in P fertilisers and unknown effects on the TM chemical fractions in agricultural Soils. A 16-month-long column experiment was conducted to investigate the mobility and chemical forms of Cd, Cu, Cr, Ni, and Zn introduced into a Mollisol and an Andisol through surface incorporation (0–2 cm) of triple superphosphate (TSP) fertiliser. The effects of urea and potassium chloride (KCl) applications were investigated as well. After 15 cycles of 300-mm irrigation, TSP addition increased the 4 M HNO3 extractable TM concentration in the upper (0–5 cm) section of Soils. Beyond this depth, metals showed no significant mobility, with minimal leaching losses (< 1.9%, 25-cm depth). The TM chemical forms in the 0–5 cm section were significantly (p < 0.01) affected by the Soil type and fertilisers addition. Cadmium, Ni, and Zn were the elements which appeared in a larger proportion (up to 30%) in the most labile fraction (KNO3 extractable) in fertilised Soils. The impact of urea depended on the nitrification-related changes in Soil pH, while Fertilisation with KCl tended to increase the KNO3 fraction of most metals probably due to K+ exchange reactions. Chromium remained minimally affected by the urea and KCl applications since this contaminant is strongly bound to the less labile solid phases. The low mobility of TM was governed mainly by their interaction with the solid phases rather than by their speciation at Soil pH. The mass balance showed that the geochemical processes underwent in time by the P fertiliser increased the amount of TM extracted by the chemical fractionation scheme, therefore the reaction period of TSP with Soil particles should be taken into account for evaluating TM availability. Long-term Soil Fertilisation could inadvertently contribute to an increased concentration and availability of these P fertilisers-born contaminants in the cultivated layer of acidic Soils.

Mindaugas Kvasauskas - One of the best experts on this subject based on the ideXlab platform.

  • Research on anaerobically treated organic waste suitability for Soil Fertilisation
    JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT, 2009
    Co-Authors: Mindaugas Kvasauskas, Pranas Baltrenas
    Abstract:

    Abstract One of the most promising methods to convert organic waste into alternative energy and still obtain fertiliser is anaerobic digestion of waste in bioreactors. To evaluate the suitability of biodegraded organic waste for Soil Fertilisation, an experiment aimed at determining the amount of total nitrogen, total phosphorus and heavy metals contained in this waste and testing of its pH was carried out. The following organic waste was used for the research: sewage sludge from wastewater treatment plants, fruit and vegetable waste, hen manure, piggery slurry and grain. The biggest contents of nitrogen and phosphorus were determined in anaerobically treated swine manure and therefore, it was found the most suitable organic fertiliser to remediate exhausted Soils and used‐up areas. Treated swine manure contains 8.27 mg/l of nitrogen and 293.1 mg/l of phosphorus. The biggest contents of heavy metals were determined in anaerobically treated sewage sludge from wastewater plants. The concentration of chromiu...

  • Research on suitability of anaerobically treated green waste and sewage sludge mixtures with meat waste for Soil fertilization
    2009
    Co-Authors: Mindaugas Kvasauskas
    Abstract:

    * Corresponding author. Email: pbalt@ap.vgtu.lt To evaluate the suitability of biodegraded organic waste for Soil Fertilisation, an experiment aimed at determining the amounts of total nitrogen, total phosphorus and heavy metals contained in this waste and determining its pH was carried out. Organic waste used for research consisted of mixes of meat waste (MW) with green waste (GW) and meat waste (MW) with sewage sludge (SS) in proportion 3 : 1, 1 : 1 and 1 : 3. MW and SS (1 : 3) mixture was found to be the most suitable organic fertiliser to remediate exhausted Soils and usedup areas. This mix was determined to contain the biggest contents of nitrogen and phosphorus, 4.89 mg/kg and 227.0 mg/kg respectively. Heavy metal concentrations were also found the highest among the researched cases, however they did not exceed the maximum permissible concentration (MPC) in Soil when fertilized with sludge. The concentration of chromium amounts to 1.05 mg/kg, that of zinc – 15.73 mg/kg, lead – 7.74 mg/kg, copper – 29.88 mg/kg and nickel – 11.05 mg/kg. MW and SS (1 : 3) mixture is mostly suitable for the Fertilisation of acid Soils, because its pH value was 6.8.