甘薯在本地区种植已有几百年的历史了,但对其需肥、水规律的研究及推广普及应用还相当不够。按传统的种植模式,甘薯大都是种植在二、三类土地上,管理也是比较粗放的。整个生育期不施或很少施用肥料,而在栽插时浇定植水之后,整个生育期几乎不浇水。 甘薯号称粮食之王,是一种高产粮食作物,如果按5kg甘薯折合1kg粮食计算,尽管是二类地、三类地,甘薯的 Sweet potatoes have been planted in the region for hundreds of years, but research on their needs of fertilizer and water and their popularization and application are still not enough. According to the traditional planting mode, sweet potato is mostly planted in two or three types of land, management is more extensive. Fertilization throughout the growth period or rarely applied fertilizer, and planted planting planted water, the entire growth period is almost no watering. Sweet potato known as the king of grain, is a high-yielding food crops, if calculated according to 5kg sweet potato 1kg grain, although the second type, three types of sweet potato