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OALib Journal期刊
ISSN: 2333-9721
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农田施用水葫芦对水稻磷素吸收利用的影响
DOI: 10.3724/SP.J.1145.2011.00803, PP. 803-808
Keywords: 农田施用水葫芦,水稻,磷素吸收,磷素分配,磷素效率
Abstract:
为促进农田流失养分的循环利用，2009、2010年以粳稻品种运2645为供试材料，设计农田施用水葫芦（将晒干水葫芦按4500kghm-2农田施用）、不施用水葫芦处理和施氮（n）量为120kghm-2（ln）、240kghm-2（nn）处理，研究其对水稻不同生育时期磷（p）素含量、吸收、分配和利用效率的影响.结果表明：1）农田施用水葫芦后，水稻不同生育时期植株含p率显著提高，各生育时期p素吸收量显著提高；2）农田施用水葫芦对水稻不同生育时期p素在茎鞘、叶片和穗中分配比例均无显著影响；3）农田施用水葫芦后，除够苗期外，水稻不同生育时期p素干物质生产效率极显著降低，p素籽粒效率显著降低，但p素收获指数无显著变化；4）农田施用水葫芦后，水稻产量显著提高；5）增施n肥后，水稻不同生育时期的植株p素含量和吸收量多得到显著或极显著的增加，p素干物质生产效率和p素籽粒生产效率多明显下降；6）水葫芦×n处理对稻株p素吸收利用多无显著互作效应；农田施用水葫芦使水稻植株含p率、p素吸收量显著提高，使p素干物质生产效率和p素籽粒生产效率多显著降低.图2表6参19
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