中国生态农业学报（中英文）2026，Vol.34Issue(4)：802-816,15.DOI:10.12357/cjea.20250982
秸秆还田协同石灰对华南酸性稻田土壤的改良效应
Ameliorative effects of straw returning combined with lime application on acidic paddy soils in South China
摘要
Abstract
Soil acidification constrains the rice production potential in South China.This study explored the effects of straw returning combined with lime application in ameliorating acidic soils,aiming to provide a practical basis for improving desilicated and aluminum-rich acidic soils in South China.A double-rice(early and late season)field experiment was conducted with four treatments:conventional fertilization(CF),conventional fertilization+quicklime(CFL),conventional fertilization+straw returning(CFS),and conventional fertilization+straw returning+quicklime(CFSL).The rice yield,soil physicochemical properties,organic carbon fractions,enzyme activities,and microbial community structure were systematically measured.The results showed that compared with CF,CFSL increased rice yield by 2.22％-29.57％.For soil acidification indicators,both CFL and CFSL significantly reduced exchangeable acidity and exchangeable aluminum content,while significantly increasing soil pH value by 0.60 and 0.36,respectively.In addition,CFS and CFSL significantly increased soil cation exchange capacity(CEC)by 17.72％and 20.58％,respectively.In terms of soil organic carbon,compared with CF,CFSL increased microbial biomass carbon and dissolved organic carbon content by 26.53％and 34.20％,respectively.Concurrently,CFSL enhanced the activities of soil urease,β-glucosidase,and sucrase by 33.60％,19.49％,and 13.89％,respectively.Microbial community structure analysis further revealed that CFSL not only increased the relative abundance of the bacterial phylum Proteobacteria but also significantly enhanced fungal alpha diversity and drove a pronounced"trade-off"in abundance between Ascomycota and Basidiomycota,thereby reshaping the composition and functional profile of the microbial community.In conclusion,straw returning combined with lime application optimizes the chemical properties and microbial community structure of acidic soils,effectively alleviated soil acidification,and promoted stable and increased rice yields,providing an efficient and feasible technical approach for ameliorating acidic soils in South China.关键词
酸化/石灰/秸秆还田/有机碳组分/微生物群落Key words
acidification/lime/straw returning/organic carbon fractions/microbial community分类
农业科技引用本文复制引用
王婷,邓婷,林碧珊,曾科,丁武汉,吴腾飞,易琼,张木..秸秆还田协同石灰对华南酸性稻田土壤的改良效应[J].中国生态农业学报（中英文）,2026,34(4):802-816,15.基金项目
广东省重点领域研发计划项目(2023B0202010027)资助 This study was supported by the Key Areas Research and Development Program of Guangdong Province(2023B0202010027). （2023B0202010027）
