In the shed of the vegetable farmer's friend, the reporter found a problem. The vegetable farmer's friend always tears the film hole left by covering the mulch film even more when he is pruning.
   Covering the mulch is to maintain the soil moisture and weeding effect. If the membrane hole is torn large, it will lose the important role of maintaining soil moisture, but why do farmers still want to do this?
   The Bu teacher who repeated similar operations in the shed gave the reporter an answer. The film hole is torn to a larger extent for two main reasons:
   1. Prevent stem and leaf burns
   Because the soil in the arch shed has a large area of ​​idle space, there are many weeds. The mulch covered in the shed can only choose black, but in the environment of strong sunlight, the black mulch absorbs more heat and the temperature is high. The stems and leaves of the plants on which they are shackled will be affected by the growth of the "barrel". In order to avoid the branding of stems and leaves, the vegetable farmers often tore the membrane holes, and the lower leaves were able to lie on the soil.
   2 , the film hole is gradually enlarged
   "I don't know what happened this year. After the colonization of the melon, the dead tree is serious. For this reason, we have to irrigate the roots again and again. But the membrane pores were just simmered soon after planting, which was very suitable at the time. But with the growth of the plants. The membrane hole facing the growing plant has appeared to be relatively small, and the plant stems and leaves have completely blocked the membrane hole. At this time, the rooting operation is more difficult. Like the arch shed of 2.8 mu of land , I can't pull the plant to find The roots are rooted in a tree, so the amount of labor is too great." Master Bu reflects.
   Because of the need to root and prevent disease, Master Bu chose to tear the membrane hole. In this way, the liquid medicine can be accurately poured around the root system, and the labor amount is reduced, and the disease prevention effect is also better.
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