Research on the effect of straw mulching on the soil moisture by field experiment in the piedmont plain of the Taihang Mountains

作     者：LI Man ZHANG Wei HE Yu-jiang WANG Gui-ling 

作者机构：Institute of Hydrogeology and Environmental GeologyCAGS 

出 版 物：《Journal of Groundwater Science and Engineering》 (地下水科学与工程（英文版）)

年 卷 期：2017年第5卷第3期

页      面：286-295页

学科分类：0710[理学-生物学] 0709[理学-地质学] 09[农学] 0708[理学-地球物理学] 0903[农学-农业资源与环境] 0815[工学-水利工程] 

基　　金：supported by National Fund Science and Technology Project(41672249 and 41602271) China Geological Survey Project(DD20160190) Shallow Geothermal Energy Development and Geothermal Reservoir Injection(SK201501) 

主　　题：Straw mulching Soil moisture Soil water content Deep layer Soil moisture conservation 

摘      要：To reveal the influencing effect of the long-term straw mulching on the soil moisture, this paper employed the field experiment data in 2010 of a typical area of Taihang Mountains plain, observed the soil moisture dynamic regularities under different mulching patterns by virtue of depressimeter and neutron probe, analyzed the characteristics of soil water content and storage in different depths and seasons under the long-term straw mulching. The results showed that the long-term straw mulching can keep the soil moisture conservation of the deep, while decreased the shallow.(1) The long-term straw mulching can changed the type of soil water movement. If no straw mulching, the type is mainly evaporation-infiltration. And with straw mantle the type would change into infiltration. The number of zero flux plane would be reduced or absent.(2) The long-term straw mulching can increase the soil water reserves of the whole soil profile with the depth between 0 cm and 220 cm. But the soil water content of the layer from 30 cm to 80 cm decreased and the soil water content of the layer from 80 cm to 220 cm increased instead., The effect of soil moisture conservation on winter wheat is not obvious;(3) With no straw mulching, the depth of infiltration recharge by rainfall or irrigation is shallower than 80 cm. In a straw mulching, the influence depth is can extend to 120 cm;(4) With no straw mulching, there is a deep layer on the depth of 220 cm between March and June, while this layer will disappear with a long-term straw mulching.