The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Aiwang Duan - One of the best experts on this subject based on the ideXlab platform.
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root development and water uptake in winter wheat under different Irrigation Methods and scheduling for north china
Agricultural Water Management, 2017Co-Authors: Zhongdong Huang, Guangshuai Wang, Yueping Liang, Aiwang DuanAbstract:A field experiment was conducted on winter wheat (Triticum aestivum L.) during 2013–2014 and 2014–2015 to study the root distribution profile and soil water dynamics under the main currently used Irrigation Methods in the North China Plain (NCP). The WinRHIZO system and the HYDRUS-1D model were used to identify a promising Irrigation schedule. In this two-factor experiment, three Irrigation Methods, i.e., sprinkler Irrigation (SI), surface drip Irrigation (SDI) and surface flooding (SF), were scheduled to irrigate the crop as soon as the soil water content decreased to 70%, 60% and 50% of the field capacity. The results showed that both the Irrigation Method and Irrigation schedule influenced root development, the profile root distribution pattern and the profile root water uptake (RWU). The soil surface temperature fluctuated very rapidly depending on the Irrigation Method and scheduling system used, whereas profile soil temperature fluctuations became more consistent with depth. The RWU was higher in the upper soil layer (0–60cm) for all Irrigation Methods for frequently irrigated treatments, and the maximum was observed in SDI compared to SI and SF due to the higher root length density (RLD) in the top soil under SDI. On the other hand, the RWU was higher in SF at a deep soil profile below 60cm, where it had a higher RLD compared to that of SI and SDI. SDI at 60% of FC not only improved water uptake but also resulted in better water productivity and produced the highest grain yield (9.53t/ha). The simulated RWU and soil water dynamics presented in this paper will be helpful to improve winter wheat production in the NCP and can be used as a reference for further research on water management practices.
Charles P. Gerba - One of the best experts on this subject based on the ideXlab platform.
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Impact of Drip Irrigation Method, Soil, and Virus Type on Tomato and Cucumber Contamination
Food and Environmental Virology, 2011Co-Authors: Absar Alum, Carlos Enriquez, Charles P. GerbaAbstract:The goal of this study was to better quantify the degree of viral contamination of tomato and cucumber in relationship to virus type, soil type, and Irrigation Method. Tomatoes and cucumbers were grown in ten-gallon (37.8 L) buckets filled with Pima clay loam or Brazito sandy loam soils. Plants were irrigated with secondary wastewater effluent using surface drip Irrigation or subsurface drip Irrigation. At specified time intervals Irrigation water was seeded with bacteriophages MS-2 and P22, poliovirus type 1 (PV1), enteric adenovirus 40 (Ead 40), and hepatitis A virus. Surface drip Irrigation always resulted in viral contamination of both the above and below ground parts of both crops. The roots showed the greatest level of contamination, followed by leaves and fruits. In contrast, with subsurface drip Irrigation no viruses were detected in any of the above ground plant surfaces. It was found that under similar soil type and Irrigation Method, risk of crop contamination was similar for all of the viruses studied. It can be concluded that Method of Irrigation is the single most critical factor in the contamination trend of different parts of crop plants. Plant parts can be categorized into three groups (root, stem, and leaf/fruit) based on the risk of viral contamination from Irrigation water.
Sevgi Caliskan - One of the best experts on this subject based on the ideXlab platform.
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different Irrigation Methods and water stress effects on potato yield and yield components
Agricultural Water Management, 2005Co-Authors: Sermet Onder, Mehmet Emin Caliskan, Derya Onder, Sevgi CaliskanAbstract:Abstract This research was conducted during the spring seasons of 2000 and 2002 in Hatay province located in the East Mediterranean Region of Turkey. The research investigated the effects of two drip Irrigation Methods and four different water stress levels on potato yield and yield components. The surface drip (SD) and subsurface drip (SSD) Irrigation Methods were used. The levels were full Irrigation (I100), 66% of full Irrigation (I66), 33% of full Irrigation (I33) and un-irrigated (I0) treatments. Five and three Irrigation were applied in 2000 and 2002 early potato growing seasons, respectively. Total Irrigation amount changed from 102 to 302 mm and from 88 to 268 mm in 2000 and 2002, respectively. Seasonal evapotranspiration changed between 226 and 473 mm and 166 and 391 mm in 2000 and 2002, respectively. SD and SSD Irrigation Methods did not result in a significant difference on yield. However, SD Method has more advantages than SSD Method, which has difficulties in replacement and higher system cost. Irrigation levels resulted in significant difference in both years on yield and its components. Water stress significantly affected the yield and yield parameters of early potato production. Water deficiency more than 33% of the Irrigation requirement could not be suggested. Water use efficiency (WUE) of SD Irrigation Methods had generally higher values than SSD Irrigation Methods. Treatment I33 gave maximum Irrigation water use efficiency (IWUE) for both years. SSD Irrigation Method did not provide significant advantage on yield and WUE, compared to SD Irrigation in early potato production under experimental conditions. Therefore, the SD Irrigation Method would be recommended in early potato production under Mediterranean conditions.
Zhongdong Huang - One of the best experts on this subject based on the ideXlab platform.
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root development and water uptake in winter wheat under different Irrigation Methods and scheduling for north china
Agricultural Water Management, 2017Co-Authors: Zhongdong Huang, Guangshuai Wang, Yueping Liang, Aiwang DuanAbstract:A field experiment was conducted on winter wheat (Triticum aestivum L.) during 2013–2014 and 2014–2015 to study the root distribution profile and soil water dynamics under the main currently used Irrigation Methods in the North China Plain (NCP). The WinRHIZO system and the HYDRUS-1D model were used to identify a promising Irrigation schedule. In this two-factor experiment, three Irrigation Methods, i.e., sprinkler Irrigation (SI), surface drip Irrigation (SDI) and surface flooding (SF), were scheduled to irrigate the crop as soon as the soil water content decreased to 70%, 60% and 50% of the field capacity. The results showed that both the Irrigation Method and Irrigation schedule influenced root development, the profile root distribution pattern and the profile root water uptake (RWU). The soil surface temperature fluctuated very rapidly depending on the Irrigation Method and scheduling system used, whereas profile soil temperature fluctuations became more consistent with depth. The RWU was higher in the upper soil layer (0–60cm) for all Irrigation Methods for frequently irrigated treatments, and the maximum was observed in SDI compared to SI and SF due to the higher root length density (RLD) in the top soil under SDI. On the other hand, the RWU was higher in SF at a deep soil profile below 60cm, where it had a higher RLD compared to that of SI and SDI. SDI at 60% of FC not only improved water uptake but also resulted in better water productivity and produced the highest grain yield (9.53t/ha). The simulated RWU and soil water dynamics presented in this paper will be helpful to improve winter wheat production in the NCP and can be used as a reference for further research on water management practices.
Ingmar Messing - One of the best experts on this subject based on the ideXlab platform.
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Response of maize root growth to Irrigation and nitrogen management strategies in semi-arid loamy sandy soil
Field Crops Research, 2017Co-Authors: Mario Chilundo, Rui Brito, Abraham Joel, Ingrid Wesstrom, Ingmar MessingAbstract:Strategies to promote dense, deep root systems are important for the efficient use of water and nitrogen fertilisers in subtropical loamy sandy soil. This study assessed the effect of interactions between Irrigation Method (drip and furrow), Irrigation level (full and reduced), and nitrogen fertiliser type (quick-release and slow-release) on root growth of maize (Zea mays L.) and the associated effect on grain yield, aboveground biomass and leaf area index. Factorial field experiments on semi-arid loamy sandy soil in Mozambique was carried out in four cropping periods (two in the hot-wet season, two in the cold-dry season). The response to the management factors at three growing stages of coarse (≥0.7 mm diameter) and fine (
