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大豆科学  2014 

黑龙江垦区土壤肥力现状与大豆优化施肥研究

DOI: 10.11861/j.issn.1000-9841.2014.02.0211, PP. 211-214

Keywords: 黑龙江垦区,土壤肥力,大豆,优化施肥

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Abstract:

土壤侵蚀导致东北黑土退化,土地生产力下降。为确定黑龙江垦区的土壤肥力现状,优化大豆施肥,在黑龙江省农垦九三管理局鹤山农场选择轻度、中度、严重和极严重侵蚀4个样地,设计了8个施肥处理的大豆盆栽试验。结果表明:该区开垦后,有机质、速效磷、速效钾含量减少,碱解氮含量则呈增加趋势;随侵蚀程度的加强,有机质、碱解氮、速效钾含量逐渐减少,而速效磷含量则先减少后增加。土壤供肥量处于中等水平,其中土壤供氮量中等偏下,土壤供磷量中等偏上;随侵蚀程度的加强,土壤供氮量和供钾量逐渐降低,供磷量先降低后增加。该区大豆对钾肥利用率较高,对氮、磷利用率较低;随侵蚀程度增强,大豆的氮肥利用率和钾肥利用率逐渐增加,而磷肥利用率则先增加后减小。根据养分平衡法,建议提高施肥总量为当地的1.2~2.5倍,增加氮肥用量,保证施肥配比。

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