干旱地区农业研究2024，Vol.42Issue(1)：226-236,11.DOI:10.7606/j.issn.1000-7601.2024.01.23
秸秆还田对东北黑土水分特征及物理性质的影响
Effects of straw returning on soil water characteristics and physical properties of black soil in Northeast China
摘要
Abstract
To determine the effects of straw returning on water characteristics and physical properties of black soil in Northeast China,three treatments were set up:straw mulching and returning(FG),straw overturning and returning(FM)and straw non-returning(FD).Soil water content,water characteristic curve,bulk density,hard-ness,soil three-phase ratio and structural stability were measured.The results showed as follows:(1)Straw mulc-hing and returning treatment significantly increased the soil moisture content of 0～30 cm in spring by 11.17％～150.84％campared with straw no-returning treatment.The change curve of soil water content in the middle suction section was smooth,and the straw mulching and returning treatment had higher soil water retention.(2)Straw re-turning to field can significantly improve soil water availability.Compared with straw non-returning treatment,the field water capacity of 0～10 cm soil layer in straw mulching and returning treatment increased by 4.85％～11.03％,and the soil wilting coefficient increased by 10.85％～18.00％.Gravity water in 0～10 cm soil layer of straw overtur-ning and returning treatment increased by 9.65％to 80.73％.The soil water supply capacity of straw overturning and returning treatment was increased,and specific water capacity was increased by 4.8％～10.0％compared with the straw non-returning treatment.(3)Compared with straw non-returning treatment,straw returning reduced soil compaction after harvest by 0.18～0.31 MPa.Straw mulching and returning treatment increased surface soil bulk density and decreased soil porosity.It promotes the rationality of three-phase structure and significantly increases the stability of soil structure.(4)Pearson correlation analysis showed that the R value of the three ratios was signif-icantly correlated with structural distance(r=0.73*),and soil bulk density(r=0.70*).Within a certain range,the increase of R value of the three ratios was conducive to improving and promoting the stability of soil structure.In conclusion,the implementation of straw returning in the northeastern black soil farmland was an effective measure to improve soil water content in spring,enhance soil water retention,enhance soil water supply capacity,adjust soil compaction,regulate soil,and improve soil structure and productivity ability.关键词
秸秆还田/黑土/水分特征/土壤结构/三相比R值Key words
straw returning to field/black soil/soil water characteristic/soil structure/three phase R value分类
农业科技引用本文复制引用
郑洪兵,刘武仁,郑金玉,罗洋,隋鹏祥,李瑞平,王浩,任英,袁野,周思琪,田圣陶..秸秆还田对东北黑土水分特征及物理性质的影响[J].干旱地区农业研究,2024,42(1):226-236,11.基金项目
国家重点研发计划子课题"根系层土壤结构性障碍形成及削减调控途径"(2022YFD1500104-03) （2022YFD1500104-03）
国家自然科学基金"苗带紧行间松合理耕层土壤结构特征及其调控机制"(31501248) （31501248）
吉林省农业科技创新工程国际科技合作项目"东北保护性耕作黑土结构特征及可视化研究"(CXGC202101GH) （CXGC202101GH）
吉林省留学人员科技创新创业项目"东北保护性耕作黑土结构可视化技术及应用"(吉人社发[2022]2) （吉人社发[2022]2）
