Results 11 to 20 of about 1,945 (146)
Progress in developments and applications of the HYDRUS model and associated coupling model packages [PDF]
HYDRUS model is widely used in agricultural irrigation and pollution transport because it can comprehensively consider the movement of water, heat, and pollutants in the soil-plant-atmosphere system.
Bei ZHANG +5 more
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Effects of PBAT on Soil Water and Salt in Maize Root Zone and Maize Yield in Saline-alkali Land [PDF]
[Objective] In order to reduce soil pollution caused by plastic film, the application effect of using PBAT fully biodegradable plastic film instead of ordinary PE plastic film combined with drip irrigation to grow maize in mild secondary salinized soil ...
HOU Jiana +6 more
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Review of techniques and case studies for saline-alkali land amelioration in the coastal regions of China [PDF]
Soil salinization is one of the major challenges in agricultural production and ecological development. With the rapid development of China’s coastal areas, land resources are becoming increasingly scarce, creating an urgent need for the improvement and ...
Hang LYU +5 more
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Shuitu Baochi Xuebao, 2021 为了研究垄膜沟灌系统下不同灌水量对河套灌区土壤水盐运移规律及春玉米生长特性的影响，于2019年4—10月在河套灌区曙光试验站开展田间试验，通过布设5个典型灌水量（T1，200 mm；T2，275 mm；T3，350 mm；T4，425 mm；T5，500 mm），深入研究垄膜沟灌土壤水盐运移特征及其对春玉米产量和水分利用效率（WUE）的影响，尝试寻求轻度盐渍化农田的垄膜沟灌适宜灌水量。结果表明：T4与T5处理0—120 cm土层的土壤贮水量接近，T5处理的玉米耗水量显著高于其他处理。T1 ...
罗帅 +4 more
doaj
Progress Analysis and Development Prospects of Soil Ecological and Environmental Effects of Interlayer Construction [PDF]
[Objective] This study systematically summarized and analyzed the current application status, technical characteristics, and environmental benefits of interlayer construction in soil improvement, nutrient cycling, ecological restoration, and crop ...
CHEN Jihong +7 more
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Shuitu Baochi Xuebao, 2003 滴灌入渗结束时的水盐特征是覆膜滴灌蒸发的初始条件,近年来覆膜种植技术的大面积推广使研究覆膜灌溉的水盐特征很有必要。通过非充分供水条件下滴灌入渗的三维水盐运移实验,分析了湿润锋运移的函数特征和椭圆方程,并对径向含水率剖面进行了研究。基于水分特征,分析了入渗中径向含盐率、径向浓度和径向Na 浓度剖面,并做出了相应水盐特征的等值线图。
李毅 王文焰 等
doaj +2 more sources
Correlation between soil-water characteristic curve and collapsibility in undisturbed loess [PDF]
This study investigates the correlation between the soil-water characteristic curve (SWCC) of undisturbed loess and its collapsibility. Undisturbed loess soil samples, obtained from depths up to 30 meters below the surface in Chang’an District, Xi’an ...
Haiman WANG +3 more
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Shuitu Baochi Xuebao, 2021 黄河三角洲地区的土壤入渗性能差，且盐分含量高，掺沙可以加速盐渍土块崩解，改良土壤质地与结构，从而改善入渗性能和水盐在土壤运移过程。以黄河三角洲地区盐渍土土块为研究对象，采用室内土柱模拟试验，设置3种掺沙比例：CK （0）、S1（20%）、S2（50%），土块组成： 0.25 mm的土块含量，较对照组分别降低17.92%，15.50%和51.45%，32.00%；不同掺沙比例下，同一时刻的湿润锋和累计入渗量均表现为S2 > S1 > CK，且S1和S2的稳定入渗率在第1次和第2次入渗过程中 ...
亓波 +5 more
doaj
, 2007 应用非饱和土壤水运动理论,建立膜下滴灌条件下土壤水分运动二维数值模拟模型,研究了田间层状土壤在膜下滴灌条件下土壤水分运动特征。应用不同小区不同灌水处理的实测值与模拟值进行对比,同时对模型做了精度分析,结果表明符合精度要求,这说明所建立的模型能客观地反映实际土壤条件下的水分运动情况。研究结果表明:土壤剖面30~40 cm粘土层使土壤水分运动具有很大的差异,0~30 cm变化明显,而40 cm以下土壤水分运动的变化较小。膜下滴灌应该采取灌水量小 ...
串志强, 方怡向, 盛钰, 赵成义
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Mechanical properties and permeability characteristics of mudstone-slag-based water barrier material [PDF]
To investigate the influence of mudstone content and curing age on the mechanical properties and permeability characteristics of mudstone-slag-based water barrier materials, using waste sandstone from open pit coal mine stripping was used as aggregate ...
Jiangsen ZHU +6 more
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