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铃数是决定棉花产量的主导因素,减少蕾铃脱落,增加单位面积的总铃数是提高棉花单产的基本途径。儿年来,我们从利用边际效应的角度出发,就此问题进行了一些试验和调查。现总结于后,供作参考。一、边际效应的表现与影响因素棉花是喜光喜温作物,其边行和边际(指行端)植株有明显的产量优势(简称边际效应)。据在汲县孙杏村公社和鹿邑县城郊公社的
The number of bolls is the dominant factor that determines cotton yield. Reducing the number of bolls falling off and increasing the total number of bolls per unit area is the basic way to increase cotton yield. In the past few years, from the perspective of utilizing the marginal effect, we conducted some experiments and investigations on this issue. Are summarized later, for reference. First, the marginal effect of the performance and influencing factors Cotton is hi light temperature crops, its marginal and marginal (means line) plants have obvious yield advantages (referred to as the marginal effect). According to Sun Xing Village in Jixian commune and Luyi County suburbs commune