留种甘薯以气温稳定在15℃时开始收刨,我市收刨时间一般在10月中旬前后,霜降前收完.收刨时要选晴朗暖和天气,做到“四轻”,即轻刨、轻装、轻运、轻放,尽量不碰伤薯块,以免病菌从伤口侵入造成烂薯烂窖。薯种入窖的贮藏量一般占窖总容量的60％左右,最多不能超过70％,过多过少都不易管理。具体应抓好以下四方面的技术措施。一、旧窖消毒。一般在甘薯收获前10天左右进行消毒,方法是:(1)采用2％的石灰水涂墙壁; Leave the sweet potato to the temperature stable at 15 ℃ began to collect planing, the city received planing time generally before and after mid-October, before the end of the frost to collect. Harvest sunny weather when planing, so that the “four light” , Light equipment, light transport, light, try not to touch the potato, so as to avoid bacteria invaded from the wound caused by rotten rotten cellar. Storage of potato seed into the pit generally accounts for about 60% of the total capacity of the pit, up to 70%, too much or too little is not easy to manage. Specific should do a good job in the following four aspects of technical measures. First, the old pit disinfection. Generally about 10 days before harvest sweet potato for disinfection, the method is: (1) 2% lime water wall;