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Influence of incorporation of green manure, wheat straw and chemical fertilizer on rice growth and fertility of purple clay-based paddy soil
Author(s): 
Pages: 1797-1801
Year: Issue:  10
Journal: Acta Agriculturae Zhejiangensis

Keyword:  ricegreen manurewheat strawpurple claysoil fertility;
Abstract: 通过田间试验,研究了紫云英、小麦秸秆以及二者各半混合还田与化肥配合施用对水稻产量构成、氮素利用特性以及青紫泥土壤养分含量的影响.结果表明,与单纯施用化肥相比,有机物料还田能够显著提高稻谷产量,增产幅度在13.2% ~ 18.1%.紫云英全量还田显著增加了水稻单位面积穗数,而秸秆全量还田则使每穗粒数显著增加;有机物料还田提高了成熟期水稻的总干重和氮素累积量,增加比例分别为12.5% ~17.1%和10.0% ~ 12.8%.有机物料还田在一定程度上提高了水稻的氮素生理利用效率,包括氮干物质生产效率和氮谷物生产效率.此外,有机物料还田不同程度地提高了土壤有机质、全氮、碱解氮、速效磷和速效钾含量,其中速效钾和有机质含量增加幅度分别达9.7%~12.1%和7.8% ~15.6%.小麦秸秆全量还田条件下,土壤速效钾和有机质含量增幅最高.
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