山东农业科学2023，Vol.55Issue(12)：119-126,8.DOI:10.14083/j.issn.1001-4942.2023.12.016
轮耕模式与秸秆还田量对土壤碳氮及相关酶活性变化的影响
Effects of Rotary Tillage Mode and Straw Returning Amount on Changes of Soil Carbon,Nitrogen and Related Enzyme Activities
摘要
Abstract
In order to explore the effects of rotary tillage mode and straw returning amount on the changes of soil carbon,nitrogen and related enzyme activities in wheat-peanut rotation field,the three-year positioning experiment was conducted by setting six combinations of rotary tillage methods and straw returning amount.The combinations were rotary tillage/rotary tillage/half straw returning(T1),no tillage/rotary tillage/half straw returning(T2),no tillage/subsoiling/half straw returning(T3),rotary tillage/rotary tillage/full straw retur-ning(T4),no tillage/rotary tillage/full straw returning(T5)and no tillage/subsoiling/full straw returning(T6),and their effects on soil organic carbon,total nitrogen and microbial biomass carbon and nitrogen con-tents,microbial entropy carbon and nitrogen and soil invertase and urease activities were studied.The results showed that compared with other treatments,T6 treatment could obviously increase the content of soil organic carbon,total nitrogen,microbial biomass carbon and nitrogen,microbial biomass C/N,microbial entropy car-bon and nitrogen,and also the activities of sucrase and urease in 10～20-cm and 20～40-cm soil layers;among them,the contents of soil organic carbon,total nitrogen,microbial biomass carbon and nitrogen were signifi-cantly increased.In the 0～10-cm soil layer,the soil microbial entropy nitrogen of T6 treatment was the highest and increased by 5.57%～15.19%compared with the other treatments,and the activities of sucrase and urease of T5 treatment were the highest and increased by 1.94%～5.95%and 1.63%～11.61%respectively;the soil microbial biomass C/N ratio of T3 treatment was the highest and increased by 2.43%～12.55%with significant difference compared with other treatments except T6.In 10～20-cm and 20～40-cm soil layers,the activity of soil urease under T6 treatment increased by 5.49%～11.63%and 7.14%～25.00%,respectively.The correla-tion analysis results showed that there was a positive correlation between soil carbon and nitrogen contents and soil enzyme activities.To sum up,no tillage/subsoiling/full straw returning was a better protective tillage mode,which was worth popularizing in practical production.关键词
轮耕/秸秆还田/土壤碳氮/微生物量碳氮/土壤酶活性Key words
Rotary tillage/Straw returning/Soil carbon and nitrogen/Microbial biomass carbon and ni-trogen/Soil enzyme activity分类
农业科技引用本文复制引用
杨铭,贾利元,王红军..轮耕模式与秸秆还田量对土壤碳氮及相关酶活性变化的影响[J].山东农业科学,2023,55(12):119-126,8.基金项目
河南省科技攻关项目(152102110030) （152102110030）
高职高专国家级示范专业基金项目 （）
