马铃薯实生籽很小,千粒重仅有0.5克,人们怕直播不容易出苗,而采用阳畦育苗的方法,培育实生苗,花工较大,成本较高。虽然当年能获得比较高的产量,但由于在小面积的营养床内,植株密度过大,出现病株很难淘汰,给病毒造成了传播的机会。此外,还不便于进行类型合并选,所以影响了种薯质量的提高和第二年的产量效果。因此,多 Potato seed is very small, only 0.5 grams of grain weight, people are afraid of direct seeding is not easy to emerge, but the method of raising nursery stock, nurturing seedlings, flower workers larger, higher cost. Although a relatively high yield could be obtained during that year, it was difficult to eliminate the diseased plants due to the over-density of plants in the small-area nutrient bed, creating a chance for the virus to spread. In addition, it is not convenient for the type of merger selection, thus affecting the improvement of seed quality and the yield of the second year. So much