Effects of Long-term Returning Corn Stalks to the Field Combined with Applying Fertilizer in Autumn on Microbial Biomass C,N and Enzyme Activity in Cinnamon Soil

doi:10.7668/hbnxb.2008.02.031

Abstract

Abstract: The soil of long-term experimental field(0-20 and 20-40 cm)was detected and analyzed in Shouyang county,Shanxi province.The changing of the microbial biomass C,N and soil enzyme activity in cinnamon soil and the correlation among them were both approached by long-term returning corn stalks to the field combined with applying fertilizer in autumn.The results were as follows:the amount of BC,BN and the activity of Urease and Alkaline phosphatase in cinnamon soil both decreased from 0-20 cm layer to 20-40 cm layer.BC and BN in cinnamon soil could both increased through long-term returning corn stalks to the field combined with applying fertilizer in autumn and long-term returning corn stalks to the field combined with applying fertilizer in spring.Urease activity in cinnamon soil could increase by long-term returning corn stalks to the field combined with applying fertilizer in autumn.Alkaline phosphatase activity in cinnamon soil was obviously enhanced by returning corn stalks to the field combined with applying fertilizer in autumn or spring in a long term.The apparent positive correlation was found between microbial biomass C,microbial biomass N and activities of urease and alkaline phosphatase.The four kinds of soil quality indicators-microbial biomass C,microbial biomass N,urease and alkaline phosphatase can be considered as a comprehensive index which reflected the change of soil microbial entironment.

Key words: Long一term fertilizer application, Returning corn stalks to the field combined with applyng fertilizer inautumn, C'innatmn soil, Microbial biomass, soil enzyme activity

CLC Number:

JIA Wei, ZHOU Huai-ping, XIE Wen-yan, GUAN Chun-lin, GAO Chun-hua, SHI Yan-qin. Effects of Long-term Returning Corn Stalks to the Field Combined with Applying Fertilizer in Autumn on Microbial Biomass C,N and Enzyme Activity in Cinnamon Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(2): 138-142. doi: 10.7668/hbnxb.2008.02.031.

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