Plastic Film mulching for soil Management in Walnut Orchard

As a form of orchard soil management,    plastic film mulching has been applied more and more in recent years, showing a broad application prospect. The cutting culture method of plastic film mulching in walnut young orchard can affect the phenological phase of walnut development, prolong the walnut growth period and promote the flower formation and fruit setting of walnut young trees. Through plastic film mulching, soil physical and chemical properties can be effectively improved, soil temperature and soil heat accumulation can be increased, thus promoting the vegetative growth and flower bud differentiation of walnut trees; plastic film mulching can reduce water leaching and increase soil permeability, which is conducive to microbial activity, so it can increase the content of available nutrients; plastic film mulching can reduce wind and rain, artificial trampling, and keep the soil loose. Plastic film mulching can enhance the reflected light, especially the scattered light in the morning and evening, which is beneficial to improve the photosynthesis of walnut, increase the accumulation of dry matter, and facilitate flower formation and fruit setting.

The picture shows walnut

   plastic film mulching is to cover the rows of walnut trees with plastic film and punch holes in the film to facilitate the infiltration of Rain Water. The best time for plastic film mulching is in autumn. Plastic film mulching in early spring has fewer advantages and more disadvantages. Plastic film mulching in early spring can be kept basically intact until the end of summer, while the summer temperature is high and Rain Water is big, so the soil temperature and humidity are too high, which is not conducive to the growth of fruit trees. In the late autumn, when plastic film is needed to increase temperature and preserve soil moisture, most of the mulch covering in early spring has been seriously damaged, making it difficult to play its due role. In autumn, soil moisture is sufficient, and plastic film mulching can protect soil moisture, which can reduce the dryness of autumn, winter and spring, prolong the growth period of roots, and increase the number of new roots and total roots of fruit trees. promote the reflux of aboveground organic assimilates and the synthesis of amino acids in the roots, and increase the storage of nutrients by the roots. If plastic film mulching is combined with base fertilizer, it can enhance the effect of applying base fertilizer in autumn, effectively prolong the activity time of soil organisms, promote the dispersion and release of nutrients, improve tree nutrition, and provide good conditions for fruit trees to survive the winter safely and grow in the following year. Film mulching in autumn can also play the role of heat preservation and anti-freezing in winter, and can also play the effect of covering in spring, and the plastic film has been damaged in summer, which can eliminate the adverse effects.

  , however, it is worth noting that in arid and cold areas, plastic film mulching of young walnut trees in autumn and winter will aggravate the overwintering freezing injury of young walnut trees. Due to the high temperature of the film-mulched land, the root activity of young trees is exuberant, the degree of dormancy is shallow, and it is easy to cause frost damage, so other measures should be taken to prevent soil drying in winter in order to preserve water and moisture.