生态环境学报2025，Vol.34Issue(4)：521-533,13.DOI:10.16258/j.cnki.1674-5906.2025.04.003
保护性耕作对南方双季稻田土壤性质及产量的影响
Effects of Soil Properties and Yield of Double-Cropping Rice in Southern China under Conservation Tillage Mode
摘要
Abstract
Conservation tillage,which reduces soil disturbance compared to traditional high-intensity tillage methods,is an environmentally friendly and economical approach.In this study,two double-cropping rice-planting areas in Leizhou and Dapu in Guangdong Province were selected for a two-year fixed-site experiment.Using traditional tillage as a control,we examined the effects of no-tillage and reduced-tillage conservation practices on soil structure,soil organic matter,and rice yield in southern double-cropping systems.The results showed that conservation tillage had no significant effect on the soil bulk density or porosity at either location.However,the effect of reduced tillage on soil organic matter and macro-aggregate content varied by region.In Leizhou,reduced tillage generally increased the content of soil organic matter and macroaggregates,with the highest increases reaching 48.8%and 17.4%,respectively.In contrast,in Dapu,organic matter decreased slightly,and macroaggregate content showed no significant change.Rice yield responded significantly to different tillage modes.In both Leizhou and Dapu,double-cropping rice yield was the highest under reduced tillage(p<0.05),with the highest increase reaching 12.7%and no tillage slightly higher than traditional tillage.The reduced tillage mode helps mitigate leaching,surface runoff,and the loss of nitrogen and phosphorus due to heavy rainfall in the southern region,and also reduces soil erosion,thereby increasing rice yield.This study indicates that while short-term conservation tillage(2 a)has no significant impact on soil structure,reduced tillage appears to be a more effective practice for enhancing rice yield in southern double-cropping systems.These findings have practical significance for improving paddy field soil fertility and crop yields under different tillage modes in southern China.关键词
耕作模式/双季稻/土壤结构/土壤有机质/水稻产量Key words
tillage modes/double-cropping rice/soil structure/soil organic matter/rice yield分类
农业科学引用本文复制引用
杜明慧,李伯欣,余英德,陶琳,范世献,余敏男,于晓雯,邹淑君,黄德银..保护性耕作对南方双季稻田土壤性质及产量的影响[J].生态环境学报,2025,34(4):521-533,13.基金项目
广东省科学院百名青年人才培养专项(2020GDASYL-20200104018) （2020GDASYL-20200104018）
广东省科技计划项目(2023B1212060044) （2023B1212060044）
