编辑同志: 我们这里搞育苗工作的人员普遍反映,旧塑料薄膜育苗或育秧效果比新的好。据我们在苏庄大队对棉花营养钵苗床的调查,确实是这样。透光强。使用过的塑膜表层失去油脂,早上膜内层不积水珠,光线能直接照射到苗床内。而新塑膜内层,每天早上布满了水珠,有时床内形成雾气,阻挡了阳光的照 Editor comrades: We work here nursery staff generally reflect the old plastic film nursery or nursery effect better than new. According to our investigation of cotton nursery bed seedlings in the Su Zhuang brigade, this is indeed the case. Strong light transmission Plastic film used to lose the surface layer, the inner layer of the morning film does not accumulate beads, the light can be shined directly into the seedbed. The new plastic film inner layer, filled with drops of water every morning, and sometimes the formation of fog within the bed, blocking the sunshine