| 氮肥运筹模式对双季稻北缘水稻氮素吸收利用及产量的影响 |
| |
| 引用本文： | 吴文革,张四海,赵决建,吴桂成,李泽福,夏加发.氮肥运筹模式对双季稻北缘水稻氮素吸收利用及产量的影响[J].植物营养与肥料学报,2007,13(5):757-764. |
| |
| 作者姓名： | 吴文革 张四海 赵决建 吴桂成 李泽福 夏加发 |
| |
| 作者单位： | 1.安徽省农业科学院水稻研究所农业部长江中下游稻作技术创新中心 安徽合肥230031; |
| |
| 摘 要： | 在双季稻北缘地区,以常规品种早籼65和杂交组合香两优68为试验材料,在施氮量150.kg/hm2的条件下,研究了不同氮肥运筹模式对早稻产量及氮素吸收利用特性的影响。结果表明:减少基、蘖肥,提高穗肥比例可增加抽穗成熟期的叶片含氮量,使SPAD值维持较高水平,提高齐穗后的绿叶面积和有效叶面积率,提高群体光合势,有利于促进干物质积累而提高产量和氮素吸收,常规稻和杂交稻均以基∶蘖∶穗=50∶25∶25运筹模式产量最高;前氮后移增施穗肥因能为水稻整个生育期提供比较平衡的氮素供应,可促进氮素的吸收;氮肥当季利用效率随穗肥比例提高而增加,但氮肥的农学利用率与产量有更好的对应关系。基∶蘖∶穗=50∶25∶25的运筹模式是双季稻北缘地区早稻合理的施肥技术。
|
| 关 键 词： | 早稻 氮肥运筹 产量 吸氮特性 |
| 文章编号： | 1008-505X（2007）05-0757-08 |
| 收稿时间： | 2006-06-05 |
| 修稿时间： | 2007-01-29 |
Nitrogen uptake, utilization and rice yield in the north rimland of double-cropping rice region as affected by different nitrogen management strategies |
| |
| WU Wen-ge,ZHANG Si-hai,ZHAO Jue-jian,WU Gui-cheng,LI Ze-fu,XIA Jia-fa.Nitrogen uptake, utilization and rice yield in the north rimland of double-cropping rice region as affected by different nitrogen management strategies[J].Plant Nutrition and Fertilizer Science,2007,13(5):757-764. |
| |
| Authors: | WU Wen-ge ZHANG Si-hai ZHAO Jue-jian WU Gui-cheng LI Ze-fu XIA Jia-fa |
| |
| Affiliation: | 1.Rice Cultivation Technology Innovation Center in the Middle and Lower Reaches of Yangtze River;Ministry of Agriculture;Institute of Rice Science;Anhui Agriculture Academy;Hefei 230031;China; |
| |
| Abstract: | Two early indica rice cultivars of Xiangliangyou 68 and Zaoxian 65 were used to study nitrogen uptake,utilization,yield and yield components as affected by different split N application strategies when the total nitrogen application amount was 150 kg/ha in the north rimland of double-cropping rice.Results showed that reducing N application before transplanting and at tillering stage but increasing N application at booting stage could increase rice yield and nitrogen uptake and utilization,by increasing leaf nitrogen content and SPAD in top 3 leaves during heading stage to mature stage,and increasing LAI and effective leaf area percentage.When nitrogen fertilizer was applied before transplanting(50%),tillering(25%),booting (25%),both hybrid and conventional rice cultivars had highest yield.The main benefit of postponing N fertilizer application time on yield formation was related to its improved splitting and timing of fertilizer N applications leading to a more balanced supply of N nutrition for rice growth than the common fertilizer practice,and to increase total amount of N-absorption(ANA).Nitrogen fertilizer use efficiency(NUE) increased with the percentage of panicle fertilizer,but the agronomic use efficiency of N fertilizer had better relationship with yield. It is concluded that the split application of N before transplanting(50%),at tillering stage(25%) and at booting stage(25%) is a rational N application strategy in the north rimland of double-cropping rice. |
| |
| Keywords: | early rice nitrogen management yield characters of nitrogen uptake |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
|
点击此处可从《植物营养与肥料学报》下载全文 |
|
