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地膜覆盖和秸秆还田对玉米地与土壤氮素转化相关的土壤酶活性影响研究
学位论文
硕士, 兰州: 兰州大学, 2016
Authors:
孔雪静
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Submit date：2019/01/17
氮素转化
秸秆还田
地膜覆盖
蛋白酶
脱氨酶
脱氢酶
脲酶
