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多年来，人们总是习惯把上年的甘薯留下做种，这种办法留种用量大，保管不善还会烂种，影响春甘薯的栽插面积和产量的提高。而利用甘薯藤越冬做种好处很多：（１）每亩可节约薯种５０公斤以上；（２）薯藤经过一冬的生长，根系发达、营养充足、秧苗粗壮，栽插后活棵快、发秧早?
Over the years, people are always accustomed to leave the sweet potato last year to do a kind of cultivation, this method to leave a large amount of seed, poor storage will rotten species, affecting sweet potato planting area and yield increase. The use of sweet potato vine wintering do a lot of benefits: (1) per acre can save more than 50 kg of potato; (2) after a winter’s root growth, root system, adequate nutrition, seedling sturdy, Hair seedling early?