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实践证明,在许多作物上,根据顶端优势的原理,应用打顶技术,有明显的增产效果。例如,棉花打顶可增产20％左右;南瓜打顶可增产30％以上;蓖麻打顶可增产40—50％;油菜和红薯打顶增产幅度更大。据报道,湖北省嘉鱼县农科所1972年对0.22亩油菜进行打顶试验,平均亩产达540斤;湖南省新晃县1976年对125亩红薯进行“挡尖繁枝”,一般亩产鲜薯10,000斤,最高亩产为17,800斤;又如,水稻收割后,出现的禾生稻,烟草刈秆,产生的二茬烟,也都是打顶的产物。
Practice has proved that in many crops, according to the principle of the top advantage, the application of topping technology, a significant increase in yield. For example, cotton tops can increase about 20%; pumpkin tops can increase more than 30%; castor tops can increase 40-50%; rape and sweet potato tops more yield increase. According to reports, Jiayu County, Hubei Province Agricultural Institute in 1972 to 0.22 acres of rape topping test, the average per mu up to 540 kg; Xinhuang County, Hunan Province in 1976 to 125 acres of sweet potato “block the sharp branches”, the general mu 10,000 kilograms of fresh produce, the highest yield of 17,800 pounds per mu; another example, after the rice harvest, the emergence of Wo rice, tobacco mulching, resulting in two stubble smoke, are also top product.