When planting potatoes, which is better, white film or black film?

Compared with white plastic film, black plastic film absorbs heat quickly, and of course the ground temperature rises quickly. Therefore, if the potato seedlings are covered with black plastic film, it is necessary to adopt the method of artificial ventilation in time. Black plastic film can't directly irradiate the soil because of its poor light transmittance, so the ground temperature rises slowly, which is suitable for crops with low requirements on light and temperature. Like growing strawberries.

The white plastic film has good light transmittance, suitable thickness, aging resistance, and warming and moisturizing effect on the middle and surface soil. After plastic film mulching, the ground temperature can be increased by about 3℃, which is beneficial to promote the early emergence of potatoes. Especially for potatoes planted in spring, after planting, cover the ridge with a special black film for potatoes and slightly press the surrounding soil. This not only saves labor, but also has the function of heat preservation and moisture preservation, and the emergence of seedlings is 3 ~ 5 days earlier than that of conventional straw or white film mulching.

In our local area, black plastic film is generally used in winter, because it has better thermal insulation effect and can effectively control the formation of soda water. Black plastic film can prevent the surface temperature from rising in warm winter, which is not conducive to potato growth. During potato emergence, it can be said that transparent plastic film is completely superior to black plastic film. During the emergence of potatoes, it may be necessary to dig seedlings. Transparent plastic film is obvious, but black plastic film is hard to find. Judging whether it is necessary to buckle seedlings only by the distance between plants.

There are two main forms of potato peritoneum, one is pre-seed peritoneum and the other is post-seed peritoneum. No matter in the peritoneum before or after planting, the potatoes planted in the peritoneum return to seedlings quickly, and the potato seedlings grow healthily and have grown leaves. The first benefit of plastic film mulching cultivation in spring is to increase the land area of planting plots. I am transparent. On sunny days, sunlight can shine on the ground through plastic film and be converted into heat energy to be stored in the soil. In the cultivation of promoting early maturity, if plastic film and small arch shed are used, or the sowing area is relatively small, it is advisable to choose the way of black film mulching first and then drilling.