穗肥施用时期对水稻氮素利用及产量的影响  

Effect of application stage of panicle fertilizer on rice grain yield and the utilization of nitrogen

作　　者：丁艳锋[1] 赵长华[1] 王强盛[1] 

机构地区：[1]南京农业大学农业部作物生长调控重点开放实验室,江苏南京210095

出　　处：《南京农业大学学报》2003年第4期5-8,共4页Journal of Nanjing Agricultural University

基　　金：江苏省农业技术更新工程"水稻优质高效集约化生产技术体系"及"水稻精确施肥技术研究"项目资助

摘　　要：以越光和武香粳 9号为材料研究了不同穗肥施用时期施氮对水稻氮素利用及产量的影响。结果表明 :倒 1 5叶 ,倒 2 5和 0 5叶 ,倒 3 5、 2 5和 1 5叶施肥提高了花后高效叶片叶绿素含量和含氮率。穗肥施用提高了水稻的产量 ,倒3 5、 2 5和 1 5叶 ,倒 3 5和 1 5叶 ,倒 2 5叶施肥对增加两品种产量 ,提高穗肥利用率和生产力作用显著。施用穗肥增产的机制两品种表现不一致 :越光主要表现在结实率的提高 ,武香粳 9号主要表现为每穗总粒数的增加。生育期较短的越光穗肥利用率略低于生育期较长的武香粳 9号。Effect of application stage of panicle fertilizer on the rice grain yield and quality was studied with two Japonica rice(Koshihikari and Wuxiangjing 9).The results were showed as follows:panicle fertilizer was applied at 1.5 leaves from top(LFT),2.5 and 0.5 LFT,and 3.5,2.5 and 1.5 LFT could increase the chlorophyll and nitrogen content of higher effective leaves,and thus increased the rice yield.The yield increment for Koshihikari mainly resulted from the percentage of ripen grain,as a contrast,Wuxiangjing 9 resulted from the increment of the grain number per panicle.Panicle fertilizer was applied at 3.5,2.5 and 1.5 LFT,3.5 and 1.5 LFT, and 2.5 LFT could increase the rate of panicle fertilizer utilization, the productivity of panicle fertilizer in two varieties.Nitrogen use efficiency of panicle fertilizer of Koshihikari was lower than that of Wuxingjing 9.

关 键 词：穗肥 施用时期 水稻 氮素利用率 产量 生长发育 

分 类 号：S511[农业科学—作物学]