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太湖竺山湾小流域果园养分投入特征及其土壤肥力状况分析

DOI: 10.11654/jaes.2014.10.010, PP. 1940-1947

Keywords: 太湖流域,果园,,,钾投入,有机肥,养分盈余

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Abstract:

以太湖竺山湾周边5个镇为研究区域,采取资料调研与实地调查相结合的方法分析果园养分投入特征,并采集典型果园土壤样本评价土壤肥力状况。结果表明,太湖流域果园总体氮、磷、钾平均投入量分别为N522、P2O5674、K2O462kg·hm-2,其中来自于有机肥的比例分别为51.3%、58.3%和44.0%.化学肥主要为氮、磷、钾三元复合肥,有机肥以鸡粪和牛粪为主。土壤有机质、全氮、全磷和全钾含量均处于适宜至很丰富水平,土壤速效磷和速效钾基本上处于较丰富状态,氮、磷、钾养分平均盈余量分别为N320、P2O5426、K2O108kg·hm-2.太湖流域果园氮、磷的高投入不可避免地加大了氮、磷向水体迁移的风险,因而亟待研发有效的果园节氮控磷技术。

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