摘要： 在池栽条件下,研究了不同施氮水平对强筋小麦8901和弱筋小麦1391生育后期旗叶叶绿素含量、光合速率、灌浆速率和产量的影响。结果表明,两品种表现为随施氮量的增加,叶绿素含量、光合速率都有增加的趋势,但是过量氮肥又使它们降低。在本试验条件下,两品种均以中氮处理(240kg/hm²)光合速率大,灌浆进程合理,产量水平高。研究发现,强筋和弱筋小麦生育后期叶光合特性和子粒灌浆进程差异显著;旗叶光合速率和叶绿素含量及子粒产量呈正相关。

关键词: 小麦, 氮素水平, 叶绿素含量, 光合速率, 灌浆速率, 产量

Abstract: In pool culture, the ef fects of nitrogen rate on chlorophyll content, photosy nthesis rate, grain filling rate and yield w ere studied w ith strong-gluten w heat 8901 and w eak-g luten w heat 1391. The results ind-i cated that chlorophyll content and photosy nthesis rate of the tw o dif ferent gluten cult ivars w ere grow ing higher w ith the increasing of N. But in 240-360 kg/ ha, the t rend was weaken. In the condit ions of this experiment, w e found that the chlorophyll content, photosynthesis rate andYield of the two cult ivars were hig her under the moderate nitrogen t reatment ( 240 kg/ ha), and the g rain filling course w as reasonable. We also discovered that photosynthesis rate in f lag leaves and grain filling course of tw o different genetic-type cult ivars differented signif icantly. In the reproduct ive stage, the photosynthesis rate was posit ively correlated w ith grain yield and the chlorophyll content of the flag leaf.

Key words: Key words:Wheat, Nit rogen rate, Chlorophyll content, Photosynthesis rate, Grain filling, Yield

中图分类号: 

• S512.01