Effects of biochar on water movement characteristics in sandy soil under drip irrigation

作     者：PU Shenghai LI Guangyong TANG Guangmu ZHANG Yunshu XU Wanli LIPan FENG Guangping DING Feng 

作者机构：College of Water Resources and Civil EngineeringChina Agriculture UniversityBeijing 100083China Institute of Soil Fertilizer and Agricultural Water SavingXinjiang Academy of Agricultural SciencesUrumqi 830091China Key Laboratory of Northwest Oasis Agricultural EnvironmentMinistry of Agriculture of ChinaUrumqi 830091China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2019年第11卷第5期

页      面：740-753页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：supported by the Special Fund for Agro-scientific Research in the Public Interest(20130313006,201503136) the National Natural Science Foundation of China(31660073) the National Key Research and Development Program of China(2017YFD0200803-04,2018YFD0800804,2017YFD0201900) the Youth Foundation of Xinjiang Academy of Agricultural Sciences(xjnkq-2015002) 

主　　题：biochar sandy soil water holding capacity water movement drip irrigation 

摘      要：Biochar addition can improve the physical and hydraulic characteristics of sandy *** study investigated the effects of biochar on water holding capacity and water movement in sandy soil under drip *** indoor simulation experiments,the effects of biochar application at five levels(0%,1%,2%,4%and 6%)on the soil water retention curve,infiltration characteristics of drip irrigation and water distribution were tested and *** results showed that biochar addition rate was positively correlated with water holding capacity of sandy soil and soil available *** the same infiltration time,with an increasing amount of added biochar,the diffusion distance of the horizontal wetting front(HWF)tended to decrease,while the infiltration distance of vertical wetting front(VWF)initially declined and then *** features of wetted bodies changed frombroad-shallowtonarrow-deep*** relationship between the transport distances of HWF and VWF and the infiltration time was described by a power *** the same distance from the point source,the larger the amount of added biochar,the higher the soil water *** had a great influence on the water content of the layer with biochar(0–200 mm)and had some effects at 200–250 mm without biochar;but it had less influence on the soil water content deeper than 250 *** the application rate of biochar of 4%,most water was retained within 0–250 mm soil ***,when biochar application amount was high(6%),it would be helpful for water *** the improvement of sandy soil,biochar application rate of 4%in the plow layer had the best effect.