一、播前准备1.品种与种薯(1)正确选用品种:选用抗病、优质、丰产、抗逆性强、适合当地栽培条件,商品性好的各类专用品种。(2)种薯选择及处理,种薯在播种前15~20天进行严格挑选,标准为:薯块完整、无病烂、无冻伤、薯皮光滑、色泽鲜艳的幼嫩薯块,淘汰尖头,有裂痕、薯片暗淡的薯块。2.种薯催芽播种前15~20天将冷藏或经物理、化学方法人工解除休眠的种薯置于15~20℃黑暗处平 First, the sowing preparation 1 varieties and seed (1) the correct selection of varieties: selection of disease resistance, high quality, high yield, strong resistance, suitable for local cultivation conditions, good variety of specialty varieties. (2) seed selection and treatment, the seed before sowing in 15 to 20 days to conduct a rigorous selection, the standard is: complete potato disease, disease-free rot, no frostbite, sweet potato skin, bright color of the young potato block, out of sharp Head, cracked, dim potato chips. 2. Seed germination 15 to 20 days before sowing will be frozen or physical and chemical methods to manually remove the dormant seed placed in the dark at 15 ~ 20 ℃ level