【摘 要】
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Subsoil denitrification is an important mechanism to reduce nitrate leaching into groundwater.However,factors limiting subsoil denitrification,especially in
【机 构】
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University of Chinese Academy of Sciences,Yuquan Road,Beijing 100049,China
【出 处】
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第七次全国土壤生物与生物化学学术研讨会暨第二次全国土壤健康学术研讨会
论文部分内容阅读
Subsoil denitrification is an important mechanism to reduce nitrate leaching into groundwater.However,factors limiting subsoil denitrification,especially in the soil beneath the root zone,have not been well investigated.We collected intact soil columns of 0-12 m from fields in the North China Plain with long-term nitrogen(N)fertilization input of 0(N0),200(N200)and 600(N600)kg N ha-1 yr-1.Within the 0-12 m soil profiles we determined physical properties and chemical properties related to denitrification,i.e.soil texture,water content,nitrate,dissolved organic carbon(DOC),soil organic carbon(SOC),denitrifying enzyme activity(DEA)and actual denitrification rate(ADR).
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