我县自1980年以来,就进行了甘薯摘心的试验、示范和推广工作。至1985年全县累计推广应用该项措施面积已达29.29万亩,占甘薯总面积的21.4%。其中1984、1985两年甘薯摘心面积分别为9.7万亩和5.563万亩,占当年甘薯面积的51.3%和33.8%。几年来的生产实践证明,甘薯摘心的增产效果显著。而且,这种方法简单易行。一、增产效果据近几年甘薯摘心的试验和大田生产示范表明,摘心的增产幅度虽受到多种因素的影响,但是,摘 Since 1980, my county has carried out trials, demonstrations and popularization of sweet topping. By 1985, the total area of ​​this measure popularized and applied has reached 292,900 mu, accounting for 21.4% of the total area of ​​sweet potato. In 1984 and 1985, sweet-potato inpping areas were 97,000 mu and 55,600 mu, respectively, accounting for 51.3% and 33.8% of the sweet potato area in that year. Over the past few years of production practice has proved that sweet potato topping yield significant effect. Moreover, this method is simple and easy. First, the effect of increased yield According to recent years, sweet potato topping test and field production demonstration shows that although the yield of topping is affected by many factors, but the pick