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大豆科学  2009 

行间覆膜栽培对大豆根际土壤微生物区系和土壤肥力的影响

DOI: 10.11861/j.issn.1000-9841.2009.05.0875, PP. 875-878

Keywords: 大豆,行间覆膜,微生物区系,土壤肥力

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Abstract:

为了解大豆行间覆膜栽培增产的产量生理基础,以高光效大豆品种黑农40为材料,进行了行间覆膜和不覆膜处理,对行间覆膜栽培大豆根际土壤微生物区系和土壤肥力进行了研究。结果表明:行间覆膜并没有改变土壤根际微生物主要的三大类群种类的变化,仍是细菌总量最高,其次为放线菌、真菌数量最少。覆膜比不覆膜增加了大豆根际土壤微生物总量,细菌、放线菌、真菌增量高峰期分别出现在R1、R2、R1时期,总数量高峰出现在V2期;覆膜比不覆膜增加了大豆根际土壤微生物生物碳含量,覆膜栽培大豆各生育时期速率N、速效P、速效K的含量高于不覆膜(CK)。因此,行间覆膜栽培增产的产量生理基础之一,是提高了大豆根际土壤微生物数量和生物碳的含量,促进了土壤养分转化,促进了大豆生长发育,提高了大豆群体光能利用效率,导致提高了产量。

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