山西农业科学2025，Vol.53Issue(4)：56-63,8.DOI:10.26942/j.cnki.issn.1002-2481.2025.04.07
耕作方式对稻田土壤团聚体构成和水溶性有机碳的影响
Effect of Tillage Method on Soil Aggregates Composition and Water-Soluble Organic Carbon in Paddy Field
摘要
Abstract
The cultivation method is an important agricultural measure that affects the composition of soil aggregates and has significant implications for soil structure and organic carbon(SOC)stability.In this study,two modes of rotary tillage(RT)and no-tillage(NT)for rice and wheat were set,by comparing the differences in soil aggregate organic carbon composition and water-soluble organic carbon(WSOC)content between different tillage methods after 2 years to reveal the changes in soil water-soluble organic carbon(WSOC)and aggregate organic carbon under tillage methods.The results showed that the soil organic carbon of NT was 3.36%higher than that of RT.The content and proportion of WSOC in NT were lower than those in RT by 16.91%and 19.52%,respectively.Under the NT treatment,the proportion of large aggregates(>2 mm)was the highest,accounting for 54.48%,while under the RT treatment,the proportion of intermediate aggregates(0.25～2 mm)was the highest,accounting for 49.13%.The mean weight diameter of aggregates under the RT and NT treatments was 1.07 mm and 1.49 mm,respectively.The mean weight diameter of aggregates under the NT treatment was significantly higher than that under the RT treatment.Under the NT treatment,the proportion of organic carbon in>2 mm large aggregate was the highest,accounting for 57.84%.While,under the RT treatment,the proportion of organic carbon in 0.25～2 mm aggregate was the highest,accounting for 48.50%.No tillage for rice and wheat was more conducive to increasing the content of organic carbon in soil large aggregates,while rotary tillage for rice and wheat was more conducive to increasing the proportion of organic carbon in middle aggregates.The significant negative correlation between WSOC and large and medium sized aggregates indicated that the dissolution of WSOC was not conducive to the formation of soil aggregates larger than 0.25 mm.Relatively,NT was more conducive to the formation of soil large aggregates and the improvement of organic carbon stability,and was an recommended effective tillage method to enhance soil aggregate structure and SOC stability.关键词
旋耕/免耕/水溶性有机碳/土壤团聚体Key words
rotary tillage/no-tillage/water-soluble organic carbon/soil aggregate分类
农业科技引用本文复制引用
董林林,盛雪雯,严凯,陆长婴,施林林,王海候,吴正贵..耕作方式对稻田土壤团聚体构成和水溶性有机碳的影响[J].山西农业科学,2025,53(4):56-63,8.基金项目
苏州市农业科技创新项目(SNG2022071) （SNG2022071）
苏州市碳达峰碳中和科技重点专项(ST202228) （ST202228）
江苏省碳达峰碳中和专项(BE2022308) （BE2022308）
