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据前人研究,一般高产甘薯的叶面积系数以达到4为宜,在此指数以下,单位面积产量随着叶面积的增加而提高。我县甘薯一般栽培,其叶面积系数大都在1左右,为了使地上部叶蔓生长繁茂,增加同化营养面积,制造更多的营养物质,以满足增产的需要,我们采用摘心的办法,促进分枝,多长叶蔓,来探讨其对增产的作用,以指导生产实践。本试验于1960—1963年在城关公社前型大队和南埔公
According to previous studies, the leaf area index of high-yield sweet potato in order to achieve 4 is appropriate, below this index, yield per unit area increased with the increase of leaf area. I County sweet potato generally cultivated, the leaf area coefficient is mostly around 1, in order to make the aboveground leaf vines grow lush, increase assimilation nutrient area, create more nutrients to meet the needs of production, we use topping method, Branches, leaves and more long, to explore its role in increasing production to guide the practice of production. The experiment in 1960-1963 in the former commune commune brigade and Nanpu public