| 结实期水分与氮素对水稻氮素利用与养分吸收的影响 |
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| 引用本文： | 陈新红,徐国伟,王志琴,杨建昌.结实期水分与氮素对水稻氮素利用与养分吸收的影响[J].干旱地区农业研究,2004,22(2):35-40. |
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| 作者姓名： | 陈新红 徐国伟 王志琴 杨建昌 |
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| 作者单位： | 扬州大学农学院农学系,江苏,扬州,225009 |
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| 基金项目： | 国家十五重大攻关项目(2001BA507A-09-01-03)，江苏省科技攻关项目(BE2001331)，江苏省作物栽培生理重点实验室开放课题项目。 |
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| 摘 要： | 以武育粳3号和汕优63为材料,研究了结实期水分与氮素对水稻氮素利用与养分吸收的影响。结果表明:随氮素水平的提高,稻株吸氮量增加,氮素的利用率、产谷效率和营养器官的氮素转运率下降,稻草中氮的滞留量提高;氮肥促进了稻株对P、K的吸收;水分胁迫降低了稻株的吸氮能力,但提高了氮素的利用率、产谷效率和营养器官的氮素转运率;水分胁迫降低了稻株对P、K的吸收,但提高了对P的利用率;水分与氮肥有明显的互作效应,在一定的氮肥水平下,轻度的水分胁迫,可不降低产量或提高产量,同时提高了水稻的氮素利用率,减少稻田氮的损失。
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| 关 键 词： | 水分 氮素 水稻 氮素利用 养分吸收 |
| 文章编号： | 1000-7601(2004)02-0035-06 |
| 修稿时间： | 2003年7月7日 |
Effects of water and nitrogen on nitrogen utilization and nutrient uptake of rice at late stage |
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| CHEN Xin-hong,XU Guo-wei,WANG Zhi-qin,YANG Jian-chang.Effects of water and nitrogen on nitrogen utilization and nutrient uptake of rice at late stage[J].Agricultural Research in the Arid Areas,2004,22(2):35-40. |
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| Authors: | CHEN Xin-hong XU Guo-wei WANG Zhi-qin YANG Jian-chang |
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| Abstract: | Using Wuyujing 3 and Shanyou 63 as experiment materials, this article studies the effects of water and nitrogen on nitrogen utilization and nutrient uptake of rice at late stage. The results show: with the rise of nitrogen application, the plant nitrogen uptake and the nitrogen remained in straw are increased, while the nitrogen dry matter production efficiency (NDMPE), the nitrogen grain production efficiency (NGPE) and the nitrogen transportation efficiency (NTE) of rice are reduced; Nitrogen fertilizer can improve the P and K uptake of rice; Water stress can lower the nitrogen uptake ability of plants, but increase the NDMPE, the NGPE and the NTE of vegetative organs; Water stress can lower the P and K uptake amount of plants, but raise the use efficiency of P; There is an obvious interaction between water and nitrogen, therefore, under certain nitrogen application condition, a moderate water stress is beneficial to raise the nitrogen use efficiency and reduce the nitrogen loss as well as to get a satisfactory yield of rice. |
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| Keywords: | water nitrogen rice nitrogen utilization nutrient uptake |
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