土壤与作物2024，Vol.13Issue(2)：173-180,8.DOI:10.11689/sc.2023041601
黑土物理特性变化及改善途径
Changes of physical properties and ameliorating approaches in Mollisols farmland
摘要
Abstract
Mollisols in Northeast China is one of the four major black soil regions in the world,known for its high fertility and organic matter.The region is a dominant grain production base in China,playing an important role in national food security.However,due to the intensive cultivation,the structure and eco-function of Mollisols in Northeast China worsens,and its soil fertility decreases,which threatens regional food security and ecological security.The physical properties of Mollisols changed with the increased soil bulk density as well as reduction in soil porosity,water-stable aggregates and field water holding capacity.Soil structure is closely associated with soil aeration,water and fertilizer retention properties.Effective tillage and fertilization may improve soil structure to curb the trend of soil fertility decline.This paper summarizes previous studies in terms of the changes in soil bulk density,water-stable aggregates,field water holding capacity and saturated hydraulic conductivity since Mollisols'reclamation,highlights the importance of cultivation and organic fertilizer input on soil physical properties,discusses how the different conservative measures may improve soil physical properties and enhance soil fertility,and prospects the future research to optimize tillage system and organic fertilization,to optimize crop planting mode.关键词
黑土/水稳性团聚体/容重/饱和导水率/田间持水量Key words
Mollisols/water-stable aggregates/bulk density/saturated hydraulic conductivity/field water holding capacity分类
农业科技引用本文复制引用
张敏,韩晓增,陆欣春,陈旭,严君,邹文秀..黑土物理特性变化及改善途径[J].土壤与作物,2024,13(2):173-180,8.基金项目
国家重点研发计划(2022YFD1500100) （2022YFD1500100）
中国科学院战略性先导科技专项A类(XDA28070100) （XDA28070100）
财政部和农业农村部:国家现代农业产业技术体系资助(CARS-04). （CARS-04）
