Effects of Nitrogen Rate on Photosynthesis Rate in Flag Leaves and Grain Filling Course of Two Different Genetic-type Wheats

doi:10.3321/j.issn:1000-7091.2004.04.011

Abstract

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

CLC Number:

S512.01

CAI Rui-guo, WANG Zhen-lin, LI Wen-yang, ZHANG Min, ZHOU Zhu-nan. Effects of Nitrogen Rate on Photosynthesis Rate in Flag Leaves and Grain Filling Course of Two Different Genetic-type Wheats[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2004, 19(4): 36-41. doi: 10.3321/j.issn:1000-7091.2004.04.011.

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