Effects of Rotary Tillage Mode and Straw Returning Amount on Changes of Soil Carbon,Nitrogen and Related Enzyme Activities
Yang Ming
Jia Liyuan
Wang Hongjun
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.
Keywords：Rotary tillageStraw returningSoil carbon and nitrogenMicrobial biomass carbon and ni-trogenSoil enzyme activity
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 119-126 )