Simultaneously the complex infection of Potatovirus Y(PVY)and Cucumber mosaic virus(CMV)is also a crucial problem to be resolved at present.
同时，黄瓜花叶病毒（CMV）和马铃薯Y病毒（PVY）的复合侵染也是当前生产上亟待解决的主要问题。
2
Therefore, virus free potato has a higher energy utilization efficiency and more accumulated photosynthate which are of benefit to high yield.
因而，脱毒马铃薯光能利用率高，积累的光合产物多，有利于高产。
3
There is the reward decrement relationship between K amounts from organic and inorganic fertilizer and yield of virus-free potato, and the reciprocal effect presents a negative value.