山西省雁同地区历年种植马铃薯150多万亩,其中90％分布在丘陵和山区的旱坡地上。春天搞好抗旱保苗,秋天最大程度地满足需水盛期所需水分,对马铃薯生产十分重要。为此,我们在实施“六六六”工程中把小整种薯适期晚播作为两项主要抗旱技术进行了试验、示范、推广,在晋北旱坡地上增产效果明显,一般增产幅度在20％以上。我们于1988和1989两年在广灵县进行了调 Over 150 million mu of potatoes were planted in YanTong area of ​​Shanxi Province in the past years, 90% of which are distributed on the arid slopes of hills and mountains. Drought seedlings do a good job in spring, fall to maximize water demand to meet the peak water demand, is very important for potato production. Therefore, in the implementation of the “666” project, we conducted trial, demonstration and popularization of the small whole potato late sowing as two major drought-resistance technologies in the implementation of the “666” project. More than 20%. We transferred in Guangling from 1988 to 1989