The Effect of Biochar on Soil Enzyme Activity，Microbial Community Structure and Soil Nutrient Content in the Soil Amended with Cinnamic Acid

doi:10.3969/j.issn.1000-7091.2013.03.038

Abstract

Abstract: We investigated the effects of biochar in different proportions on the quantity of soil microorganisms，enzyme activities and soil available nutrients in the soil amended with phenolic acids． The cinnamic acid was added into the soil treated with different proportions of biochar within 40 days incubation under room temperature． The results obtained are listed as follows． Cinnamic acid had different effect on four soilenzyme activities． Proteinase was impacted most strongly． Bacterial numbers increased while fungi decreased． Cinnamic acid reduced soil available N，available P，available K and NH +4 -N content and promoted NO-3 -N accumulation in the soil． When 2．5% or 5%carbonized maize cob was added into the soil treated with Cinnamic． Activities of soil urase， acid phosphatase，polyphenol oxidase and proteinase were increased． The quantity of soil bacteria was increased while the quantity of soil fungi and the ratios of B/F were decreased． The inhabitations on soil available nutrients were alleviated by applied biochar． Which showed that biochar could absorb allelochemicals， and release the toxic function of allelochemicals．

Key words: Biochar, Cinnamic acid, Soil enzyme, Soil micro-organism, Soil available nutrients

CLC Number:

S158

Li Liangliang, Li Tianlai, Zang Jian, Chen Bin, Liu Wene, Wu Zhengchao. The Effect of Biochar on Soil Enzyme Activity，Microbial Community Structure and Soil Nutrient Content in the Soil Amended with Cinnamic Acid[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(3): 210-216. doi: 10.3969/j.issn.1000-7091.2013.03.038.

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