土壤2024，Vol.56Issue(4)：735-741,7.DOI:10.13758/j.cnki.tr.2024.04.006
柑橘大豆间作对土壤团聚体结构及其有机碳、氮分布的影响
Effects of Citrus and Soybean Intercropping on Soil Aggregate Structure,Organic Carbon and Nitrogen Distribution
摘要
Abstract
The study aimed to investigate the differences in soil aggregate structures and organic carbon and nitrogen distribution under different years of citrus and soybean intercropping system in order to provide reference for orchard soil improvement.Four treatments were set up in the field positioning experiments,including clear tillage area(CK,citrus without soybean),citrus and soybean intercropping for 1 year(T1),2 years(T2)and 3 years(T3),respectively,and then soil aggregate composition,stability,organic carbon and total nitrogen contents were determined and compared under the different treatments.The results showed that:1)Compared with CK,the contents of large aggregates＞0.25 mm increased by 19.58％to 22.29％under citrus and soybean intercropping treatments.2)The stability characteristics of soil aggregates in citrus and soybean intercropping were as follows:T3＞T2＞T1＞CK.3)The contents of organic carbon and total nitrogen were the highest in＞5 mm aggregates,but the lowest in＜0.25 mm aggregates,and the C/N ratios under citrus and soybean intercropping treatments increased by 1.16-1.19 times compared with CK.4)The correlations were significant between soil aggregate composition and organic carbon and total nitrogen contents in soil aggregates.RDA explained 99.32％and 94.99％of difference information respectively,among which＞5,5-2 and 0.5-0.25 mm soil aggregates were the main environmental factors affecting the changes of soil organic carbon and total nitrogen contents.In conclusion,citrus and soybean intercropping system promotes soil fertility and soil aggregate structure,thus,it is a sustainable agricultural mode.关键词
柑橘园/大豆/间作/土壤团聚体/有机碳/全氮/C/NKey words
Citrus orchards/Soybean/Intercropping/Soil aggregate/Organic carbon/Total nitrogen/C/N ratio分类
农业科技引用本文复制引用
曹胜,曾斌,邓素枫,龚碧涯,张文,罗赛男,杨水芝..柑橘大豆间作对土壤团聚体结构及其有机碳、氮分布的影响[J].土壤,2024,56(4):735-741,7.基金项目
湖南省科技创新计划项目(2023NK4210)、湖南省农业科技创新资金项目(2023CX23)和湖南省水果产业技术体系项目资助. （2023NK4210）
