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[1]JIA Fenmei,ZHANG Shuhua,WEI Yadong.Variation of Soil Nutrients and Soil Microbial Activities of Different Tillage Systems in Farmland[J].Research of Soil and Water Conservation,2018,25(05):112-117.

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Variation of Soil Nutrients and Soil Microbial Activities of Different Tillage Systems in Farmland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 05 Page number: 112-117 Column: Public date: 2018-09-06

Title:: Variation of Soil Nutrients and Soil Microbial Activities of Different Tillage Systems in Farmland

Author(s):: JIA Fenmei, ZHANG Shuhua, WEI Yadong; College of Agriculture and Water Conservancy Engineering, Suihua University, Suihua, Heilongjiang 152061, China

Keywords:: tillage system; farmland; soil nutriens; soil microbial activities

CLC:: S174.5

DOI:: -

Abstract:: Soil nutrients and soil microbial biomass play an important role in material cycling and energy transformation in farmland ecosystem. We present a comprehensive analysis of soil nutrients and soil microbial activities of different tillage systems in farmland through three successive years’ field investigation and indoor analysis. The results showed that the soils of different tillage systems were slightly acidic, pH decreased in the order:no tillage > ploughed tillage > rotary tillage, and soil bulk density had the opposite trend compared with total soil porosity; soil organic matter and total nitrogen and available nutrients (available phosphorus, ammonium nitrogen and nitrate nitrogen) of different tillage systems had the same change trend, which decreased in the sequence:rotary tillage > ploughed tillage > no tillage, while contents of soil total phosphorus were no significantly different among different tillage systems (p > 0.05); compared with no tillage, there were the significantly increases in soil microbial biomass (carbon and nitrogen), soil microbial quantites (bacteria, fungi, actinomycetes, nitrogen-fixing bacteria and cellulose bacteria), decreased in the order:rotary tillage > ploughed tillage > no tillage; soil microbial activities ranged from 0.41 to 0.69, which decreased in order:rotary tillage > ploughed tillage > no tillage with the difference significant (p < 0.05). Overall, the soil microbial biomass carbon turnover rate was higher than the soil microbial biomass nitrogen turnover which indicated that the microbial biomass carbon updates faster than microbial biomass nitrogen. Path analysis showed that soil organic carbon, total nitrogen, nitrate, ammonium nitrogen and bacteria had the direct effect on soil microbial activity, and soil microbial biomass carbon, microbial biomass nitrogen, fungus quantity and nitrogen fixation bacteria had the indirect effect on soil microbial activity.

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