我们收到内蒙古呼和浩特市郊区糖农王月贵给本刊的来信,信中说:“我们村里过去种甜菜产量比较低,现在有了塑料薄膜,甜菜覆盖地膜后增产效果很显著.但是有人说.覆盖地膜以后甜菜的含糖率降低了,虽然农民收入多了,可国家受了损失.是这样吗?有没有解决的办法?”现就信中所提问题作如下答复. We received a letter from our correspondent Wang Yuegui, a sugar beehive on the outskirts of Hohhot, Inner Mongolia, saying: “In the past, the yield of beet in our village was relatively low. Now there is a plastic film. The sugar content of beets after the film mulching is reduced, although the farmers have more income, but the country has suffered a loss. Is that the case? Is there any solution? ”I now give the following reply to the questions raised in the letter.