The content of the available ferrum enhanced by recycled straws, but that of the available zincum, copper and manganese had no changed obviously in soil.
秸秆直接还田提高了土壤的有
铁
量,但对有铜、有锌和有
量影
不大。
The content of the available ferrum enhanced by recycled straws, but that of the available zincum, copper and manganese had no changed obviously in soil.
秸秆直接还田提高了土壤的有铁量,但对有铜、有锌和有量影不大。
：
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