河北农业科学2026，Vol.30Issue(2)：48-56,9.DOI:10.12148/hbnykx.20260013
冬绿肥还田和化肥施用对滨海盐碱耕地土壤团聚体稳定性及其有机碳含量的影响
Effects of Winter Green Manure Incorporation and Chemical Fertilizer Application on Soil Aggregate Sta-bility and Organic Carbon Content in Coastal Saline-Alkali Farmland
摘要
Abstract
Based on a 9-year long-term positioning experiment,this study investigated the effects of winter green manure incorporation on soil aggregate composi-tion,stability,and organic carbon distribution in coastal saline-alkali farmland,so as to provide theo-retical support for biological improvement of saline-al-kali soils.A two-factor split-plot field experiment had been carried out since 2015.The four annual double cropping systems(WFM:winter fallow field-maize;RM:rye-maize;HM:hairy vetch-maize;OM:O-rychophragmus violaceus-maize)were set as main treatments.The sub-treatments included two chemical fertilizer applications:no chemical fertilizer(0%F)and 75%of conventional fertilizer rate(75%F).Soil aggre-gate composition,mean weight diameter(MWD),geometric mean diameter(GMD),percentage of aggregate destruction(PAD),and organic carbon distribution within aggregates were investigated.The results showed that compared with WFM treatment,SM,HM and OM significantly increased the soil water-stable aggregates of＞5.00 mm fraction by 1.68,3.89 and 0.97 percentage points.The total contents of water-stable aggregates of＞0.25 mm fraction(R0.25)by 4.10,6.37 and 1.94 percentage points.Meanwhile,MWD significantly increased by 0.16 mm,0.30 mm and 0.08 mm,and the GMD significantly increased by 0.02 mm,0.04 mm and 0.01 mm,while PAD significantly decreased by 4.63,6.83,and 2.28 percentage points.Additionally,the patterns of SM,HM and OM significantly increased the organic carbon content in R0.25 aggregates by 1.06 g/kg,1.70 g/kg and 0.65 g/kg,respectively.Compared with the 0%F treatment,the 75%F treatment under SM,HM,OM and WFM patterns significantly decreased soil R0.25 by 4.56,10.61,3.37 and 2.01 percentage points,MWD decreased by 0.28 mm,0.45 mm,0.05 mm,and 0.07 mm,while PAD significantly increased by 4.52,11.63,3.86 and 1.83 per-centage points,respectively.Correlation analysis showed that soil organic carbon content had a highly significant positive linear correlation with the total content of R0.25 aggregates,a positive linear correlation with organic car-bon content in R0.25 aggregates,significant positive linear correlation with MWD and G MD,and a significant negative linear correlation with PAD.In conclusion,planting and incorporating winter green manure in fallow fields of coastal saline-alkali regions could increase the content and organic carbon of water-stable macroaggre-gates and improve soil aggregate stability.Nevertheless,fertilizer application markedly reduces the content of soil water-stable macroaggregates and disrupts aggregate stability.The combination of winter green manure in-corporation with appropriate chemical fertilizer reduction is beneficial for promoting the formation of water-stable macroaggregates and improving soil structure.关键词
冬绿肥/滨海盐碱地/土壤团聚体/团聚体稳定性/有机碳Key words
Winter green manure/Coastal saline-alkali farmland/Soil aggregates/Aggregate stability/Organic carbon分类
农业科技引用本文复制引用
秦文利,刘忠宽,侯升林,潘璇,石嘉琦..冬绿肥还田和化肥施用对滨海盐碱耕地土壤团聚体稳定性及其有机碳含量的影响[J].河北农业科学,2026,30(2):48-56,9.基金项目
国家重点研发计划项目(2021YFD190090107) （2021YFD190090107）
河北省省级科技计划项目(21327503D) （21327503D）
河北省农林科学院现代农业科技创新专项(2022KJCXZX-ZHS-7,2022KJCXZX-ZHS-8) （2022KJCXZX-ZHS-7,2022KJCXZX-ZHS-8）
