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Ahmad Bakour - One of the best experts on this subject based on the ideXlab platform.
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effects of Saline Water Irrigation on soil salinity and yield of summer maize zea mays l in subsurface drainage system
Agricultural Water Management, 2017Co-Authors: Genxiang Feng, Zhanyu Zhang, Peirong Lu, Ahmad BakourAbstract:Sustainable development of Saline Water Irrigation was restricted by salt accumulation in the soil profile without appropriate salt discharging measures. A two year study was conducted in 2014 and 2015 to identify the effect of Saline Water Irrigation on soil salt and maize yield under subsurface drainage system. The treatments of this study comprised three levels of Water salinity with 0.78, 3.75, and 6.25dSm−1 (S1–S3) and three levels of subsurface drainage depth with no subsurface drainage, drain depth of 0.8m and 1.2m (D0–D2). Results indicated that the average salt content within the root zone was in the order of D0>D2>D1. No salt accumulation occurred during the two growing seasons under D1, but there was salt accumulation under D2S3. Soil desalinization efficiency reduced with the increasing of Irrigation Water salinity, and the average desalinization efficiency for D1 was higher than that of D0 and D2. Maize yield and Water use efficiency decreased with the increase of Water salinity. The yield decreased by 2.08–3.01% for every 1dSm−1 increase in salinity level of Irrigation Water under D1, and 3.53–3.93% for every 1dSm−1 under D2. The effects of Water salinity and drainage depth on maize yield and WUE were significant (p<0.05) in the two growing seasons. From the view points of relative yield and soil salt balance, it can be recognized even as the salinity level of Irrigation Water is as high as 6.25dSm−1, Saline Water can be applied to irrigate maize under drain depth of 0.8m.
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Effects of Saline Water Irrigation on soil salinity and yield of summer maize (Zea mays L.) in subsurface drainage system
Agricultural Water Management, 2017Co-Authors: Feng Genxiang, Zhang Zhanyu, Changyu Wan, Ahmad BakourAbstract:Sustainable development of Saline Water Irrigation was restricted by salt accumulation in the soil profile without appropriate salt discharging measures. A two year study was conducted in 2014 and 2015 to identify the effect of Saline Water Irrigation on soil salt and maize yield under subsurface drainage system. The treatments of this study comprised three levels of Water salinity with 0.78, 3.75, and 6.25dSm−1 (S1–S3) and three levels of subsurface drainage depth with no subsurface drainage, drain depth of 0.8m and 1.2m (D0–D2). Results indicated that the average salt content within the root zone was in the order of D0>D2>D1. No salt accumulation occurred during the two growing seasons under D1, but there was salt accumulation under D2S3. Soil desalinization efficiency reduced with the increasing of Irrigation Water salinity, and the average desalinization efficiency for D1 was higher than that of D0 and D2. Maize yield and Water use efficiency decreased with the increase of Water salinity. The yield decreased by 2.08–3.01% for every 1dSm−1 increase in salinity level of Irrigation Water under D1, and 3.53–3.93% for every 1dSm−1 under D2. The effects of Water salinity and drainage depth on maize yield and WUE were significant (p
Genxiang Feng - One of the best experts on this subject based on the ideXlab platform.
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Evaluating the Sustainable Use of Saline Water Irrigation on Soil Water-Salt Content and Grain Yield under Subsurface Drainage Condition
Sustainability, 2019Co-Authors: Genxiang Feng, Zhanyu Zhang, Zhang ZeminAbstract:A sustainable Irrigation system is known to improve the farmland soil Water-salt environment and increase crop yields. However, the sustainable use of Saline Irrigation Water under proper drainage measures still needs further study. In this study, a two-year experiment was performed to assess the sustainable effects of Saline Water Irrigation under subsurface drainage condition. A coupled model consisting of the HYDRUS-2D model and EPIC module was used to investigate the effects of Irrigation Water salinity (IWS) and subsurface drainage depth (SDD) on soil Water-salt content and summer maize yield when Saline Water was adopted for Irrigation under different subsurface drainage measures. Summer maize in the two-year experiments were irrigated with Saline Water of three different salinity levels (0.78, 3.75, and 6.25 dS m−1) under three different drainage conditions (no subsurface drainage, drain depth of 80 cm, and drain depth of 120 cm). The field observed data such as soil Water content, soil salinity within root zone, ET and grain yield in 2016 and 2017 were used for calibration and validation, respectively. The calibration and validation results indicated that there was good correlation between the field measured data and the HYDRUS-EPIC model simulated data, where RMSE, NSE (> 0.50), and R2 (> 0.70) satisfied the requirements of model accuracy. Based on a seven × seven (IWS × SDD) scenario simulation, the effects of IWS and SDD on summer maize relative grain yield and Water use efficiency (WUE) were evaluated in the form of a contour map; the relative grain yield and WUE obtained peak values when drain depth was around 100 cm, where the relative yield of summer maize was about 0.82 and 0.53 at IWS of 8 and 12 dS m−1, and the mean WUE was 1.66 kg m−3. The proper IWS under subsurface drainage systems was also optimized by the scenario simulation results; the summer maize relative yield was still about 0.80 even when the IWS was as high as 8.61 dS m−1. In summary, subsurface drainage measures may provide important support for the sustainable utilization of Saline Water in Irrigation. Moreover, the coupled HYDRUS-EPIC model should be a beneficial tool to evaluate future sustainability of the Irrigation system.
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effects of Saline Water Irrigation on soil salinity and yield of summer maize zea mays l in subsurface drainage system
Agricultural Water Management, 2017Co-Authors: Genxiang Feng, Zhanyu Zhang, Peirong Lu, Ahmad BakourAbstract:Sustainable development of Saline Water Irrigation was restricted by salt accumulation in the soil profile without appropriate salt discharging measures. A two year study was conducted in 2014 and 2015 to identify the effect of Saline Water Irrigation on soil salt and maize yield under subsurface drainage system. The treatments of this study comprised three levels of Water salinity with 0.78, 3.75, and 6.25dSm−1 (S1–S3) and three levels of subsurface drainage depth with no subsurface drainage, drain depth of 0.8m and 1.2m (D0–D2). Results indicated that the average salt content within the root zone was in the order of D0>D2>D1. No salt accumulation occurred during the two growing seasons under D1, but there was salt accumulation under D2S3. Soil desalinization efficiency reduced with the increasing of Irrigation Water salinity, and the average desalinization efficiency for D1 was higher than that of D0 and D2. Maize yield and Water use efficiency decreased with the increase of Water salinity. The yield decreased by 2.08–3.01% for every 1dSm−1 increase in salinity level of Irrigation Water under D1, and 3.53–3.93% for every 1dSm−1 under D2. The effects of Water salinity and drainage depth on maize yield and WUE were significant (p<0.05) in the two growing seasons. From the view points of relative yield and soil salt balance, it can be recognized even as the salinity level of Irrigation Water is as high as 6.25dSm−1, Saline Water can be applied to irrigate maize under drain depth of 0.8m.
Zhanyu Zhang - One of the best experts on this subject based on the ideXlab platform.
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Evaluating the Sustainable Use of Saline Water Irrigation on Soil Water-Salt Content and Grain Yield under Subsurface Drainage Condition
Sustainability, 2019Co-Authors: Genxiang Feng, Zhanyu Zhang, Zhang ZeminAbstract:A sustainable Irrigation system is known to improve the farmland soil Water-salt environment and increase crop yields. However, the sustainable use of Saline Irrigation Water under proper drainage measures still needs further study. In this study, a two-year experiment was performed to assess the sustainable effects of Saline Water Irrigation under subsurface drainage condition. A coupled model consisting of the HYDRUS-2D model and EPIC module was used to investigate the effects of Irrigation Water salinity (IWS) and subsurface drainage depth (SDD) on soil Water-salt content and summer maize yield when Saline Water was adopted for Irrigation under different subsurface drainage measures. Summer maize in the two-year experiments were irrigated with Saline Water of three different salinity levels (0.78, 3.75, and 6.25 dS m−1) under three different drainage conditions (no subsurface drainage, drain depth of 80 cm, and drain depth of 120 cm). The field observed data such as soil Water content, soil salinity within root zone, ET and grain yield in 2016 and 2017 were used for calibration and validation, respectively. The calibration and validation results indicated that there was good correlation between the field measured data and the HYDRUS-EPIC model simulated data, where RMSE, NSE (> 0.50), and R2 (> 0.70) satisfied the requirements of model accuracy. Based on a seven × seven (IWS × SDD) scenario simulation, the effects of IWS and SDD on summer maize relative grain yield and Water use efficiency (WUE) were evaluated in the form of a contour map; the relative grain yield and WUE obtained peak values when drain depth was around 100 cm, where the relative yield of summer maize was about 0.82 and 0.53 at IWS of 8 and 12 dS m−1, and the mean WUE was 1.66 kg m−3. The proper IWS under subsurface drainage systems was also optimized by the scenario simulation results; the summer maize relative yield was still about 0.80 even when the IWS was as high as 8.61 dS m−1. In summary, subsurface drainage measures may provide important support for the sustainable utilization of Saline Water in Irrigation. Moreover, the coupled HYDRUS-EPIC model should be a beneficial tool to evaluate future sustainability of the Irrigation system.
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Effect of Straw Biochar on Soil Properties and Wheat Production under Saline Water Irrigation
Agronomy, 2019Co-Authors: Mingyi Huang, Zhanyu Zhang, Yaming Zhai, Chengli ZhuAbstract:Use of Saline Water for Irrigation is essential to mitigate increasing agricultural Water demands in arid and semi-arid regions. The objective of this study is to address the potential of using straw biochar as a soil amendment to promote wheat production under Saline Water Irrigation. A field experiment was conducted in a clay loam soil from eastern China during 2016/2017 and 2017/2018 winter wheat season. There were five treatments: freshWater Irrigation (0.3 dS m−1), Saline Water Irrigation (10 dS m−1), Saline Water Irrigation (10 dS m−1) combined with biochar of 10, 20, 30 t ha−1. Saline Water Irrigation alone caused soil salinization and decreased wheat growth and yield. The incorporation of biochar decreased soil bulk density by 5.5%–11.6% and increased permeability by 35.4%–49.5%, and improved soil nutrient status. Biochar also reduced soil sodium adsorption ratio by 25.7%–32.6% under Saline Water Irrigation. Furthermore, biochar alleviated salt stress by maintaining higher leaf relative Water content and lower Na+/K+ ratio, and further enhanced photosynthesis and relieved leaf senescence during reproductive stages, leading to better grain formation. Compared to Saline Water Irrigation alone, biochar application of 10 and 20 t ha−1 significantly increased wheat grain yield by 8.6 and 8.4%, respectively. High dose of biochar might increase soil salinity and limit N availability. In the study, biochar amendment at 10 t ha−1 would be a proper practice at least over two years to facilitate Saline Water Irrigation for wheat production. Long-term studies are recommended to advance the understanding of the sustainable use of straw biochar.
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effects of Saline Water Irrigation on soil salinity and yield of summer maize zea mays l in subsurface drainage system
Agricultural Water Management, 2017Co-Authors: Genxiang Feng, Zhanyu Zhang, Peirong Lu, Ahmad BakourAbstract:Sustainable development of Saline Water Irrigation was restricted by salt accumulation in the soil profile without appropriate salt discharging measures. A two year study was conducted in 2014 and 2015 to identify the effect of Saline Water Irrigation on soil salt and maize yield under subsurface drainage system. The treatments of this study comprised three levels of Water salinity with 0.78, 3.75, and 6.25dSm−1 (S1–S3) and three levels of subsurface drainage depth with no subsurface drainage, drain depth of 0.8m and 1.2m (D0–D2). Results indicated that the average salt content within the root zone was in the order of D0>D2>D1. No salt accumulation occurred during the two growing seasons under D1, but there was salt accumulation under D2S3. Soil desalinization efficiency reduced with the increasing of Irrigation Water salinity, and the average desalinization efficiency for D1 was higher than that of D0 and D2. Maize yield and Water use efficiency decreased with the increase of Water salinity. The yield decreased by 2.08–3.01% for every 1dSm−1 increase in salinity level of Irrigation Water under D1, and 3.53–3.93% for every 1dSm−1 under D2. The effects of Water salinity and drainage depth on maize yield and WUE were significant (p<0.05) in the two growing seasons. From the view points of relative yield and soil salt balance, it can be recognized even as the salinity level of Irrigation Water is as high as 6.25dSm−1, Saline Water can be applied to irrigate maize under drain depth of 0.8m.
Peirong Lu - One of the best experts on this subject based on the ideXlab platform.
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effects of Saline Water Irrigation on soil salinity and yield of summer maize zea mays l in subsurface drainage system
Agricultural Water Management, 2017Co-Authors: Genxiang Feng, Zhanyu Zhang, Peirong Lu, Ahmad BakourAbstract:Sustainable development of Saline Water Irrigation was restricted by salt accumulation in the soil profile without appropriate salt discharging measures. A two year study was conducted in 2014 and 2015 to identify the effect of Saline Water Irrigation on soil salt and maize yield under subsurface drainage system. The treatments of this study comprised three levels of Water salinity with 0.78, 3.75, and 6.25dSm−1 (S1–S3) and three levels of subsurface drainage depth with no subsurface drainage, drain depth of 0.8m and 1.2m (D0–D2). Results indicated that the average salt content within the root zone was in the order of D0>D2>D1. No salt accumulation occurred during the two growing seasons under D1, but there was salt accumulation under D2S3. Soil desalinization efficiency reduced with the increasing of Irrigation Water salinity, and the average desalinization efficiency for D1 was higher than that of D0 and D2. Maize yield and Water use efficiency decreased with the increase of Water salinity. The yield decreased by 2.08–3.01% for every 1dSm−1 increase in salinity level of Irrigation Water under D1, and 3.53–3.93% for every 1dSm−1 under D2. The effects of Water salinity and drainage depth on maize yield and WUE were significant (p<0.05) in the two growing seasons. From the view points of relative yield and soil salt balance, it can be recognized even as the salinity level of Irrigation Water is as high as 6.25dSm−1, Saline Water can be applied to irrigate maize under drain depth of 0.8m.
Qingming Wang - One of the best experts on this subject based on the ideXlab platform.
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impact of Saline Water Irrigation on Water use efficiency and soil salt accumulation for spring maize in arid regions of china
Agricultural Water Management, 2016Co-Authors: Qingming Wang, Zailin Huo, Liudong Zhang, Jianhua Wang, Yong ZhaoAbstract:Saline Water Irrigation represents the future of agriculture in the arid regions of northwestern China. Therefore, Saline Water Irrigation experiments for spring maize were performed for 3 years from 2009 to 2011 in arid regions of northwestern China, and the impact of Irrigation with Saline Water at different concentrations on the Water use efficiency and soil salt accumulation was investigated. A SWAP model was calibrated and verified using field experiment data. The relationships of the salt concentration of the Irrigation Water with the yield and Water use efficiency of spring maize were simulated using the SWAP model. Furthermore, the salt transport across the soil layers was quantitatively analyzed. The results showed the following: (1) Irrigation with Water containing low concentrations of Saline (<3g/L) for 3 consecutive years combined with a single application of fresh spring Water before sowing every year did not cause significant changes in the yield of spring maize. (2) Saline Water Irrigation for 3 consecutive years resulted in an increase in the salt accumulation at a soil depth of 0–100cm in 2011. This finding indicated that spring Irrigation did not completely leach the salt introduced by Saline Water Irrigation. (3) The SWAP simulation indicated that the yield of spring maize declined by 622kg/ha for every 1g/L increase in the salt concentration. When the salt concentration of the Irrigation Water was less than 3g/L, the yield of the spring maize was reduced by less than 10%, whereas salt concentrations above 3g/L decreased the yield much more significantly. A simulation over 10 consecutive years of Saline Water Irrigation showed that the spring maize yields of T3, T6 and T9 will reduce by 8%, 33% and 52%, respectively, compared with the yield in 2009. (4) Despite the differences in the salt concentration of Irrigation Water, the salt residue in the 0–100cm soil layer due to Irrigation with 3g/L, 6g/L and 9g/L Saline Water accounted for approximately 60% of the total salt in the Irrigation Water in 2011. The remaining 40% of the salt leached to the soil layer below 100cm. In conclusion, Irrigation with Saline Water at concentrations below 3g/L will reduce the yield by no more than 10% compared with fresh Water Irrigation, but long-term Saline Water Irrigation will result in significant yield losses, even for low concentrations of salt. Thus, the accumulation of salt in the soil after many years of Saline Water Irrigation needs to be addressed by using a proper Irrigation schedule in order to ensure the sustainability of Saline Water Irrigation.
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Impact of Saline Water Irrigation on Water use efficiency and soil salt accumulation for spring maize in arid regions of China
Agricultural Water Management, 2016Co-Authors: Qingming Wang, Zailin Huo, Liudong Zhang, Jianhua Wang, Yong ZhaoAbstract:Saline Water Irrigation represents the future of agriculture in the arid regions of northwestern China. Therefore, Saline Water Irrigation experiments for spring maize were performed for 3 years from 2009 to 2011 in arid regions of northwestern China, and the impact of Irrigation with Saline Water at different concentrations on the Water use efficiency and soil salt accumulation was investigated. A SWAP model was calibrated and verified using field experiment data. The relationships of the salt concentration of the Irrigation Water with the yield and Water use efficiency of spring maize were simulated using the SWAP model. Furthermore, the salt transport across the soil layers was quantitatively analyzed. The results showed the following: (1) Irrigation with Water containing low concentrations of Saline (
