红薯切块直播比传统栽秧提前种植20—30天,增产30—100%地下5厘米地温稳定在15℃以上即可种植,采用保护剂浸种,克服了切块薯母直栽易烂种的弊端,并利于生根、发芽,在苗高20厘米清棵,是该技术成败的关键。其技术规程如下:(1)选种。选用早熟高产新品种“SQ52—7”或适合当地种植的优良夏薯作种薯,剔除受病、冻、虫害的薯块,亩用种50—70公斤。(2)切块。200克左 The planting of sweet potato cuttings is 20-30 days earlier than that of traditional planted rice and the yield is increased by 30-100%. The underground temperature is 5 centimeters and the temperature is stable at above 15 ℃. Soaking seeds with protective agent overcomes the problem that cut potato Malpractice, and conducive to taking root, sprouting, clearance of 20 cm in height, is the key to the success of the technology. The technical regulations are as follows: (1) Selection. Select the early maturity and high yield new variety “SQ52-7” or suitable for local cultivation of sweet potato as seed tubers, remove disease, freezing, insect pest tubers, mu 50-70 kg. (2) cut into pieces. 200 grams left