地瓜生产受季节限制较小,只要温度适合,又有足够的秧苗,一年之内可以多次栽植。因此,地瓜是备荒、抗灾(可随时抢种、补种)的理想作物。但是,我省大部分地瓜产区受旧生产习惯束缚,春薯栽完,就从苗床取出母薯做饲料或供他用。这样,失去了秧苗供应基地,也就起不到应急补种作用。原有剪春薯秧苗供夏栽习惯的地区,近几年由于受干旱影响, Sweet potato production season less restricted, as long as the temperature is suitable, there are enough seedlings, within a year can be planted many times. Therefore, sweet potatoes are prepared for the shortage, the disaster (ready to grab seed, replanting) the ideal crop. However, most of the sweet potato production areas in our province are bound by the old production habits. After the spring potato plants are finished, the raw potato is taken out of the seedbed for feed or for other purposes. In this way, lost seedling supply base, it will not play the role of emergency replanting. Original cut sweet potato seedlings for summer planting habit areas, due to drought in recent years,