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1986—1987年对不同氮素水平和密度条件下棉花群体光合速率进行了研究。结果证明,合理增施N素和适当的栽培密度能明显地提高棉花群体的光合能力,这种使棉花群体光合速率提高的效应,还随生育进程而增加。棉花盛花期群体光合速率日变化为“午休型”。棉花群体光合速率与皮棉产量无相关。
From 1986 to 1987, the photosynthetic rate of cotton population under different nitrogen levels and densities was studied. The results showed that the reasonable increase of N and appropriate planting density could obviously improve the photosynthetic capacity of cotton population. The effect of increasing the photosynthetic rate of cotton population also increased with the growth process. The diurnal changes of photosynthetic rate of cotton blooming group were “lunch break type”. There was no correlation between cotton photosynthesis rate and lint yield.