| 氮素营养对水稻干物质和氮分配的影响及氮肥需求量 |
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| 引用本文： | 傅庆林,俞劲炎,陈英旭. 氮素营养对水稻干物质和氮分配的影响及氮肥需求量[J]. 浙江大学学报(农业与生命科学版), 2000, 26(4) |
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| 作者姓名： | 傅庆林 俞劲炎 陈英旭 |
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| 作者单位： | 浙江大学环境与资源学院!浙江杭州310029 |
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| 基金项目： | SupportedbytheZhejiangProvincialNaturalSci.Foundation(396 2 6 2) |
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| 摘 要： | 研究了氮素营养对杂交水稻 51 8的干物质和氮素分配的影响,结果表明:在营养生长期高氮肥用量显著增加了叶片干物质重。叶片干物质的分配量随着叶片氮含量的减少而减少。与干物质相比,在营养生长早期叶片氮素的分配量高,并且变化很小。但从幼穗分化开始叶片氮素的分配量可能因叶片、茎和颖穗发育的竞争而显著减少。采用Stanford模型估计和预测了水稻氮肥的需要量,发现Stanford模型可作为我国南方水稻生产施用氮肥的一个实用工具。
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| 关 键 词： | 氮素 干物质 氮肥需要量 Stanford模型 水稻 |
Effect of nitrogen applications on dry matter and nitrogen partitioning in rice and nitrogen fertilizer requirements for rice production |
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| FU Qing lin,YU Jing yan,CHEN Ying xu. Effect of nitrogen applications on dry matter and nitrogen partitioning in rice and nitrogen fertilizer requirements for rice production[J]. Journal of Zhejiang University(Agriculture & Life Sciences), 2000, 26(4) |
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| Authors: | FU Qing lin YU Jing yan CHEN Ying xu |
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| Abstract: | The present study evaluated the effects of nitrogen nutrition on dry matter and N partitioning in hybrid rice 518. Higher N application significantly increased dry matter partitioning of leaf at the vegetative stage. Partitioning of dry matter to leaves decreased as the N concentration in the leaves (LNC) decreased. Leaf partitioning of absorbed N, compared to dry matter, was higher and varied little during early vegetative growth, but varied greatly from panicle initiation onwards, probably due to competition for N among leaves, stem and the developing panicle. In this study, the Stanford model was selected for evaluating and predicting N fertilizer requirements for rice production. The Stanford model might be a useful tool for predicting average N fertilizer requirements for rice production in south China. |
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| Keywords: | nitrogen nutrition dry matter nitrogen fertilizer requirement Stanford model rice |
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