Subsoil tillage enhances wheat productivity,soil organic carbon and available nutrient status in dryland fields  

作　　者：Qiuyan Yan Linjia Wu Fei Dong Shuangdui Yan Feng Li Yaqin Jia Jiancheng Zhang Ruifu Zhang Xiao Huang 

机构地区：[1]Institute of Wheat Research,Shanxi Agricultural University,Linfen 041000,China [2]State Key Laboratory of Sustainable Dryland Agriculture(in preparation),Shanxi Agricultural University,Taiyuan 030031,China [3]College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,China [4]Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization,National Engineering Research Center for Organicbased Fertilizers,Nanjing Agricultural University,Nanjing 210095,China

出　　处：《Journal of Integrative Agriculture》2024年第1期251-266,共16页农业科学学报（英文版）

基　　金：financially supported by the Joint Funds of the National Natural Science Foundation of China(U22A20609);the National Key Research and Development Program of China(2021YFD1901102-4);the State Key Laboratory of Integrative Sustainable Dryland Agriculture(in preparation);the Shanxi Agricultural University,China(202003-3);the Open Fund from the State Key Laboratory of Soil Environment and Nutrient Resources of Shanxi Province,China(2020002)。

摘　　要：Tillage practices during the fallow period benefit water storage and yield in dryland wheat crops.However,there is currently no clarity on the responses of soil organic carbon(SOC),total nitrogen(TN),and available nutrients to tillage practices within the growing season.This study evaluated the effects of three tillage practices(NT,no tillage;SS,subsoil tillage;DT,deep tillage)over five years on soil physicochemical properties.Soil samples at harvest stage from the fifth year were analyzed to determine the soil aggregate and aggregate-associated C and N fractions.The results indicated that SS and DT improved grain yield,straw biomass and straw carbon return of wheat compared with NT.In contrast to DT and NT,SS favored SOC and TN concentrations and stocks by increasing the soil organic carbon sequestration rate(SOCSR)and soil nitrogen sequestration rate(TNSR)in the 0-40 cm layer.Higher SOC levels under SS and NT were associated with greater aggregate-associated C fractions,while TN was positively associated with soluble organic nitrogen(SON).Compared with DT,the NT and SS treatments improved soil available nutrients in the 0-20 cm layer.These findings suggest that SS is an excellent practice for increasing soil carbon,nitrogen and nutrient availability in dryland wheat fields in North China.

关 键 词：TILLAGE dryland wheat fields soil aggregate size soil nutrients soil carbon and nitrogen fractions 

分 类 号：S512.1[农业科学—作物学] S153.6