文章摘要
Study on the dynamical changes of soil enzyme activity in protected vegetable soiactivity in orotected vegeta ble soil
  
DOI：10.3969/j.issn.1004-874X.2009.03.023
Author NameAffiliation
王娟 定西市旱作农业科研推广中心,甘肃,定西,743000 
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