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不同株型水稻光合特性的研究
A STUDY ON THE PHOTOSYNTHETIC CHARACTERS OF DIFFERENT PLANT TYPES OF RICE
【摘要】 <正> 理想的株型,可以保证从空间结构上来提高光能利用率;而良好的光合特性,则是获得高产的生理基础。只有将两者有机地结合起来,才能获得较高的产量。 为了研究不同株型水稻品种的光合特性,1978年以中秆直立型、中秆较直立型及高秆披散型共5个品种做为试验材料,其中以当地农家品种“小白粘”为对照。现将试验结果报告如下:
【Abstract】 Series of experiments in ten rice varieties of different plant types were carried out for two years. It was found that the economical coefficient of erect middle tall types is bigger than that of the droopy-leaved tall type.The differences of chlorophyll content among rice varieties and leaves at different position was significant. Top leaves had a higher chlorophyll content and higher net photosynthetic rate, making a contrast to the lower leaves, which had a lower chlorophyll content and a lower net photosynthetic rate. Ghlorophyll content was positively correlated with the net photosynthetic rate(r=0.554).Rice varietal differences in the leaf area, net assimilation rate and assimilation capacity also existed. It was established that the correlation between leaf area and dry weight was still quite evident from the period of the recovery of growth to the time of heading(r=0.962), and it also had an evident correlation between photosynthetic potential and biological yield(in 1978 r=0.863; in 1979 r=0.93). The contribution of photosyhthetic potential to yield was different under different environmental conditions, yet the contribution to yield per unit phothsynthetic potential was nearly the same(regression coefficient b=54.51 in 1978; b=60.16 in 1979).
- 【文献出处】 中国农业科学 ,Scientia Agricultura Sinica , 编辑部邮箱 ,1980年03期
- 【被引频次】117
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