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    Rotation

    • Last Update: 2021-03-06
    • Source: Internet
    • Author: User
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    the same land for a certain number of years, the planting system for planting different crops is rotated in a predetermined order. In the one-year-old area, a fixed-zone rotation is used, that is, each rotation area rotates a different vegetable year by year according to the predetermined crop rotation order, the number of rotation areas is equal to the number of rotation years; It is difficult to implement the zone-type rotation, more use of the rotation, that is, rotation is carried out on the basis of re-breeding, requiring not only in the same land and the previous year's season cultivation of vegetables are different, but also with its before and after vegetables are not the same. The rear rotation area of the reseeding rotation is used to grow different vegetables year by year in a predetermined order. Reasonable rotation can effectively prevent vegetable diseases, insects, grass damage, reduce pesticide pollution, maintain soil strength, improve yield, reduce costs.the types of rotations are divided into dewy rotations and protective rotations according to production conditions. According to the composition of crops are divided into vegetable rotation and vegetable food rotation. In the vegetable grain rotation, it is divided into dryland rotation and water drought rotation. The vegetable rotation is mainly used in vegetable bases in the suburbs of the city and near industrial and mining areas, and the vegetable grain rotation is mainly used in the seasonal vegetable areas or processed vegetable production areas in the outer suburbs of the city. Most of the dry rotations are used to grow wet-resistant vegetables in the rice paddies after harvest, or to grow melons and fruit vegetables in the rice paddies of the previous year. Water and dry rotation is effective in preventing soil-transmitted diseases. Protection land for years (or even) planting the same vegetables, soil nutrients uneven use, salt accumulation, serious disease and insect hazards, should be implemented specific rotational zone, more melon and eggplant rotation. However, easy-to-removed protective facilities, such as assembly-type pipe racks, can be rotated with food crop lots after vegetable rotation.cycle of rotation is mainly based on the main pathogens of various types of vegetables in the cultivation environment survival and infection of different circumstances. Potatoes, yams, ginger, cucumbers, peppers, etc. need to be separated by 2-3 years, whites, taro, cabbage, tomatoes, eggplants, winter melons, melons, peas, garlic, , etc. To determine the sequence of rotations, we should take into account the biological characteristics of vegetables, the characteristics of fertilizer needs, the influence on the physical and chemical properties of soil, the needs of the mouth in reasonable arrangement, production and market and other factors. In order to ensure that a vegetable has a more stable planting area each year, it is required that the area of each round of the same rotation system is similar. In order to facilitate management and mechanized operations, rotating areas are also required to be connected as much as possible. In the rotational division, the same section or similar vegetables may be concentrated in adjacent areas as a rotation area, with other sections or other types of vegetables in annual rotation, or vegetables with similar growth and length can be arranged in the same rotation area, while rotating with the district. Aquatic vegetables in the taro,vegetables, white, lotus, etc. can be rotated year by year, self-owned independent rotation system.
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