低氮对沈农702的库源关系及灌浆进程的影响  

Effects of Low N Fertilizer on Relation of Source-sink and Grain Filling on Shennong 702

作　　者：张雪[1] 郭玉华[1] 朱彩云[1] 

机构地区：[1]沈阳农业大学农学院,辽宁沈阳110161

出　　处：《中国农学通报》2006年第3期221-224,共4页Chinese Agricultural Science Bulletin

基　　金：农业部结构调整重大技术研究项目"北方优质专用水稻新品种选育及高产高效技术研究"(编号05-01-02A)。

摘　　要：试验通过比较沈农702在正常肥区和低氮肥区进行剪叶疏花处理后的源库关系以及灌浆进程各个方面的变化来研究低氮对沈农702灌浆和产量的影响。试验结果表明,沈农702在低氮条件下的产量降低幅度小,表现出一定的耐低肥特性,低氮使茎鞘输出率有小幅度的降低。在源不足时低氮延迟灌浆,在库不足时低氮促进灌浆。沈农702在正常肥区强弱势粒同步灌浆,表现库限制型特性,在低氮条件下强弱势粒异步灌浆,表现出源限制型特性。根据以上结果在生产中可以通过调节施氮水平,缓和库源矛盾,达到降低环境污染,提高产量的目的。The effects of low N fertilizer on grain filling and yield in shennong 702 were studid through source-sink adjustment experiment of cutting leaves and glume flowers. The results were as follows： the yield was a little lower in low N fertilizer then in average N fertilizer, it showed tolerance of low N fertilizer. Low N fertilizer treatment made the export rate of stem and leaf sheath decrease a little. When the source was short, grain filling was delayed. When the sink was lack, grain filling was accelerated. Grain filling in Shennong702 was synchronous in average N fertilizer, so it was sink limiting type. Grain filling was asynchronous in low N fertilizer, so it was source limiting type. According to these results, we can ease up the conflict between source and sink, decrease environment pollution and improve production through adjust the level of N fertilizer.

关 键 词：水稻 源 库 灌浆 低氮 沈农702 

分 类 号：S511[农业科学—作物学]