玉米秸秆及其根茬不同分解时间对土壤有效微量元素的影响

Effects of Corn Stalk and Stubble in Different Decomposition Stage on Available Microelements of Soil

通过对黑钙土的培养试验 ,研究了玉米秸秆及其根茬施入土壤后不同分解时间对土壤有效微量元素的影响。在整个培养过程中 ,玉米秸秆及其根茬处理的土壤有效微量元素含量均高于对照。施用玉米秸秆土壤有效锌、锰、铁、铜提高幅度分别为 0 70～ 2 0 5、4 77～ 5 94、3 2 4～5 2 8和 0 19～ 0 63mg/kg ;施用玉米根茬土壤有效锌、锰、铁、铜分别为 0 2 1～ 0 64、2 30～ 3 72、3 96～ 6 63和 0 2 1～ 0 68mg/kg。

Effects of corn stalk and stubble applied into soil in different decomposition stage on available microelements of soil were studied by cultural experiment with churnozem.In the course of cultivation,the available microelement contents of the soil with corn stalk and stubble were higher than control treatments.The contents of the available Zn,Mn,Fe and Cu were raised respectively by 0.70～2.05 mg/kg,4.77～5.94 mg/kg,3.24～5.28 mg/kg and 0 19～0 63 mg/kg in the soil applied with corn stalk,and raised respectively by 0.21～0.64 mg/kg,2.30～3.72 mg/kg,2.96～6.63 mg/kg and 0.21～0.68 mg/kg in the soil applied with corn stubble.