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不同施肥模式下潮棕壤微量元素含量及其变化状况

DOI: 10.7668/hbnxb.2009.S1.046, PP. 195-200

Keywords: 微量元素,施肥,养分循环,潮棕壤,茬口

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Abstract:

了解下辽河平原地区不同施肥模式对于土壤微量元素含量及其变化的影响。利用下辽河平原18年的定位试验,对不同施肥处理下土壤中Fe、Mn、Zn、Cu、Pb的含量及其变化进行研究。下辽河地区所测微量元素含量均略低于全国平均水平,长期采用常规施肥方式不会对土壤造成污染;除了Fe以外,试验前后所测元素的变化量在施肥处理与CK间均有显著差异,而各元素的变化量在养分循环处理与化肥处理间无显著差异;长期试验过程中,对照处理除了Zn以外均表现出下降的趋势,施肥处理除Cu以外均表现为增加的趋势;重茬玉米地中Cu含量比豆茬玉米地高。下辽河平原地区不同施肥模式下微量元素含量均低于国家限定标准,不会对土壤造成污染;不同施肥模式下微量元素变化不同,但养分循环再利用能够增加农田中微量元素的输入,对于维持农田生态系统的可持续发展有重要意义。

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