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调查研究2008—2009年江苏武进区漕桥(品种为武香粳9号)和前黄(品种为武运粳7号)等2个大于6.7hm2机插粳稻高产示范方,探讨机插粳稻养分吸收分配特征,并对高产精确定量施肥参数进行定量。结果表明,高产机插粳稻产量的80%左右来自抽穗后的光合产物;抽穗后叶片的干物质积累呈表观输出,而茎鞘的干物质积累呈表观输入;抽穗后氮素的转运贡献率也主要来自叶片。机插粳稻对氮的吸收量随产量升高而增加,增加量主要来自抽穗后;随着产量提高,抽穗至成熟期氮积累量和积累比例均上升,对磷钾的吸收量上升但吸收比例却有下降的趋势;成熟期氮收获指数在0.51～0.61之间,磷收获指数在0.75左右,钾收获指数接近0.20;高产机插粳稻百千克籽粒需氮量为2.0～2.1kg,氮磷钾吸收比例为2.0∶0.9∶1.4。
Investigation and research Two high-yielding demonstration rice plants of more than 6.7 hm2 in japonica rice planting including Caoqiao (variety Wuweijing 9) and Qianhuang (variety Wuyunjing 7) in 2008-2009 were investigated. Absorption distribution characteristics, and quantitative high-yield precise quantitative fertilization parameters. The results showed that about 80% of the high-yield Japonica rice came from the photosynthetic products after heading; the dry matter accumulation of the leaves after heading was apparent and the dry matter accumulation of the stem-sheath was an apparent input; The rate is also mainly from the leaves. The uptake of nitrogen by machine-inserted japonica rice increased with the increase of production, mainly due to the increase of yield. The nitrogen accumulation and accumulation ratio increased from heading to maturity, while the absorption of phosphorus and potassium increased However, there was a downward trend. The harvest index of nitrogen in mature stage was between 0.51 ~ 0.61, the phosphorus harvest index was about 0.75, and the potassium harvest index was close to 0.20. The nitrogen requirement of 100 kg grain of high yielding Japonica rice was 2.0 ~ 2.1kg, The absorption ratio is 2.0: 0.9: 1.4.