Effects of tillage on soil N availability, aggregate size, and microbial biomass in a subtropical karst region
Soil and Tillage Research(2019)
摘要
•Tillage at various frequencies sharply reduced the content of soil TN and NO3−.•Soil NO3− was the main form of dissolved N in karst region probably due to high pH.•Tillage decreased the large soil aggregate (5–8 mm), MBC and MBN.•SEM showed tillage notably affecting soil N loss by break of the 5–8 mm aggregate.
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关键词
Calcareous soil,Plowing,N,Aggregate distribution,Microbial biomass
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