After the end of November, northern China will welcome frequent cooling, snowfall and rainy weather. Low-temperature and low-light weather has caused adverse effects on vegetable production. In this regard, effective response measures must be taken to ensure that agricultural production increases.
Plastic film mulching has functions of increasing temperature, keeping water, conserving fertilizer, improving soil physicochemical properties, increasing soil fertility, inhibiting weed growth, and reducing disease damage. In the case of continuous snowfall, it also has the function of reducing humidity, thereby promoting plant growth and development. Early flowering results, increase production, reduce labor costs and so on. The effectiveness of vegetable mulch film coverage to increase production and income is good. It has been recognized by most vegetable farmers, but in the production process, the following four kinds of incorrect practices must be avoided to avoid double the effectiveness and affect the output value.
One, can not use industrial film
Membrane is broadly divided into industrial membranes and agricultural membranes. It is important to choose agricultural membranes for vegetable production. Do not use industrial membranes because some industrial membranes contain some toxic substances, causing damage to crops and even causing outbreaks. Absolutely. The agricultural film is further divided into a transparent film, a black film, a silver-gray film, etc., and according to the season, the type of the crop, and the purpose of the covering, a different film is selected. Such as shed vegetables to increase temperature and moisture for the purpose of selecting the transparent membrane; to reduce the temperature, weeding and moisturizing for the purpose of selecting the black membrane; anti-mites available silver gray film.
Second, bogey ignore water management
Some people think that covering the film has a water retention effect, neglecting the water management, in fact, the water must be protected. Therefore, the moisture in the soil must be sufficient before the mulch is covered. This is the key to ensure the normal growth of seedlings and seedlings. On the contrary, if the soil is heavy, excessively watery, and lacks oxygen, it will be detrimental to seed germination and root growth. Such plots should be dried first, and when the humidity is appropriate, they should be covered with plastic film. Otherwise, the roots will be destroyed.
Third, avoid blindly sowed in advance
Filming can not be planted too early, because the cover film has good ground temperature, good sensation, rapid emergence, and the late frost is susceptible to freezing, resulting in the destruction of seedlings. To determine the seeding period must consider three factors: First, seedlings on environmental conditions requirements; The second is the local frost period: The third is the number of days from sowing to emergence. In the case that all three conditions are suitable, it is best to seed before the final frost period before sowing, so that it will be beneficial to increase production and income.
Fourth, avoid blindly applying fertilizer
Some vegetable farmers blindly increase the amount of fertilizers for high yields. In particular, simultaneous planting or application of planting will not only cause waste, increase costs, and even cause seedlings to be destroyed. Some vegetable farmers believe that the cover film can increase production, use less agricultural fertilizer, and use less fertilizer, resulting in later defermentation and affecting yield. When applying base fertilizer, no matter organic fertilizer or chemical fertilizer, it is necessary to fertilize the whole layer, and deepen 20-30 centimeters deep and fully mix with the soil to prevent shallow application on the topsoil. The amount of fertilizer used must be accurate, not too little, and the applied organic fertilizer must be fully decomposed.
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