中国土壤与肥料Issue(8)：13-22,10.DOI:10.11838/sfsc.1673-6257.24736
间作与培肥模式对潮褐土土壤团聚体和有机碳的影响
The impact of intercropping and fertilization modes on soil aggregates and organic carbon in cinnamon soil
摘要
Abstract
The study aimed to reveal the impact of intercropping and monocropping of maize and soybean on the soil organic carbon content in the fluvisol region of the North China Plain,and further explore its effects on soil organic carbon fractions and organic carbon in various soil aggregate sizes,as well as the underlying mechanisms.This research was intended to provide a scientific basis for optimizing soil management and enhancing soil carbon storage.Three planting patterns,namely maize monocropping(Maize single),soybean monocropping(Soybean single),and intercropping of maize and soybean were set up,combined with conventional fertilization(CF)and fertilization management(TF),the responses of soil physicochemical properties,organic carbon fractions,organic carbon and in aggregates under six treatments and their mechanisms affecting soil organic carbon were studied.Maize-soybean intercropping improved soil physicochemical properties,easily oxidizable organic carbon,and organic carbon content in large aggregates(>0.25 mm),but under the fertilization pattern,there was a trend of decrease in soil organic carbon,Particulate organic carbon,mineral-bound organic carbon,and microaggregates(0.053-0.25 mm)organic carbon.Fertilization management resulted in significantly increasing of soil physicochemical properties,organic carbon,Particulate organic carbon fractions,and organic carbon in aggregates,compared to conventional fertilization.The specific results were as follows:1)The soil available phosphorus content in the intercropping treatment was significantly increased by 3.31%(CF),1.88%(TF)compared to Maize single,and by 15.40%(CF),11.62%(TF)compared to Soybean single;while the soil organic carbon content was reduced by 6.96%(CF),4.24%(TF)compared to Maize single,and by 7.80%(CF),7.03%(TF)compared to Soybean single.2)Under intercropping,the organic carbon content in fine large aggregates(0.25-2 mm)was increased by 27.36%(CF)and 6.46%(TF)compared to Maize single,but decreased by 7.47%and 9.87%compared to Soybean single;the organic carbon content in microaggregates(0.053-0.25 mm)was significantly lower under intercropping compared to both Maize single and Soybean single,with a reduction range of 12.90%-20.26%,and the decrease was greater under TF than under CF.3)Different planting patterns showed a significant negative effect on soil organic carbon[standardized path coefficient(λ)=-0.43],that was,although intercropping increased the content of available phosphorus and fine large aggregate organic carbon,it more significantly led to a decrease in microaggregate organic carbon,thus reducing the soil organic carbon content.Additionally,the change in pH under intercropping further reduced microaggregate organic carbon,leading to a decrease in the total soil organic carbon organic carbon(λ=-0.23).Fertilization management significantly improved the soil chemical properties and organic carbon content of the cinnamon soil in the North China alluvial plain compared to conventional fertilization.Intercropping,due to its significant reduction in soil microaggregate organic carbon,led to a decrease in the total soil organic carbon,but the enhancement of soil large aggregate organic carbon by intercropping is key to improving soil fertility and structural stability,and this effect is not easily manifested in the short term.When formulating agricultural management measures,the complex effects of planting patterns on soil aggregate structure and organic carbon cycling should be considered comprehensively to optimize soil organic carbon storage and agricultural sustainability.关键词
玉米大豆间作/培肥模式/土壤团聚体/土壤有机碳Key words
maize-soybean intercropping/fertilization model/soil aggregates/soil organic carbon引用本文复制引用
孙傲,安宇,魏郡毅,孟思宇,王洋,许华森..间作与培肥模式对潮褐土土壤团聚体和有机碳的影响[J].中国土壤与肥料,2025,(8):13-22,10.基金项目
国家"十四五"重点研发计划项目(2021YFD1901004). （2021YFD1901004）
