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绪言 阿什利等人(1965年)发现棉花叶面积指数与产量成正相关。叶面积足够接受95％的日光,可以认为是获得作物高产的重要因素。有效的叶面积指数是由植株枝叶的方位所决定的,因为植株中、下部被荫蔽的叶片无益于光合作用,甚至可以说是寄生的(阿米与格里尔,1967年;邓肯,1967年;卡拉米与韦弗,1972年)。与正常具有叶枝和果枝的类型比较,短果枝棉株具有较高的结实系数和较低的叶面积指数(布哈特,1970年;布哈特等,1974年)。这些结构不同的品种单位面积的籽棉产量既然相同,就有进一步研究其叶面积并涉及到叶片的发生与发展的必要。
Introduction Ashley et al. (1965) found a positive correlation between cotton leaf area index and yield. Leaf area sufficient to accept 95% of the sun, can be considered an important factor in high yield crops. The effective leaf area index is determined by the orientation of plant foliage, because the lower and lower shaded leaves are not conducive to photosynthesis and may even be parasitic (Ami and Greer, 1967; Duncan, 1967 ; Kalami and Weaver, 1972). Shorter shoots had higher rooting coefficients and lower leaf area index than those with normal branches and fruit branches (Buhat, 1970; Buthart et al., 1974). Since the seed cotton yield per unit area of these different varieties is the same, it is necessary to further study the leaf area and relate to the occurrence and development of leaves.