灌溉排水学报2026，Vol.45Issue(5)：19-28,10.DOI:10.13522/j.cnki.ggps.2025350
秸秆覆盖对雨养玉米-大豆间作水、热、氮与产量的影响
Optimizing straw mulching to improve soil water,temperature,nitrogen availability and crop yield in rain-fed maize-soybean intercropping system
摘要
Abstract
[Objective]Straw mulching is widely recognized as an effective practice for conserving soil water and regulating temperature,but its optimal practical application remains unclear.This paper aimed to determine the optimal straw mulching strategy for maize-soybean intercropping system in the rain-fed region of eastern Inner Mongolia.[Method]The experiment was conducted in a field with four straw mulching treatments.During the experiment,we measured soil evaporation,soil water content and temperature,bioavailable nitrogen,as well as the yields of maize and soybean in each treatment.[Result]The optimal straw mulching treatment was the application of 10 000 kg/hm2 of straw cut into 10-20 cm segments 15 days after seedling emergence.During the entire growth period of the two crops,this treatment reduced average daily soil evaporation by 30％and increased the average soil water content in the 0-100 cm soil layer by 12％.It provided a dual regulatory effect on soil temperature,maintaining higher temperatures during the early seedling-jointing stage and reducing temperatures during the later filling-maturity stage.This effectively alleviated early-stage frost stress and late-stage heat stress.In addition,it significantly increased soil alkali-hydrolyzable nitrogen,enhanced rainwater use efficiency by 6.99％,and increased maize and soybean yields by 7.3％and 6.5％,respectively,compared with the control without straw mulching.[Conclusion]For maize-soybean intercropping systems in the rain-fed region of eastern Inner Mongolia,the optimal straw mulching practice is apply 10 000 kg/hm2 of straw cut into 10-20 cm segments 15 days after seedling emergence.These results provide a scientific basis for optimizing evaporation reduction and water conservation in rain-fed cropping systems in the study region.关键词
雨养区/黑土地/秸秆覆盖/土壤水热Key words
rain-fed area/black soil/straw mulching/soil moisture and temperature分类
农业科技引用本文复制引用
宋承昊,高晓瑜,徐冰,田德龙,王国帅,李至爽,边丹次旺..秸秆覆盖对雨养玉米-大豆间作水、热、氮与产量的影响[J].灌溉排水学报,2026,45(5):19-28,10.基金项目
内蒙古自治区科技计划项目(2023YFDZ0075) （2023YFDZ0075）
