In recent years, the replacement of apple trees is even more urgent. The selection of apple seedlings should start from two aspects. First, choose the right variety, and second, choose the high-quality rootstock.
Suitable varieties
Apple planting needs to adapt to local conditions. The area above 800 meters above sea level is apple eugenic area. Most apple eugenic areas do not have irrigation conditions. Arborization rootstocks with large root depth, long tree age, drought resistance and long fruiting years should be selected, and generally late-maturing varieties, such as Fuji, should be selected. The old course and old producing areas of the Yellow River are suitable for apples. Most of the suitable areas have fertile soil and convenient irrigation. Therefore, you should choose dwarf rootstocks with early fruiting, high yield, large size, and high light and efficiency, which can bring greater economy benefit.
High-quality rootstock
To choose apple rootstocks, you must know the basics, understand the source of the rootstock, the source of the variety, and the situation of virus prevention and control, and choose the rootstock with qualified test results. The choice of rootstocks should prevent repeated cropping. Often only one crop of fruit trees with the same attributes can be planted on the same plot, otherwise the rootstocks will grow poorly and become more diseased. When choosing a rootstock, you must choose a rootstock that is well-groomed, well-grown, well-developed, has a plump crown, straight trunk, straight tree shape, complete root system, no pests, and no mechanical damage. When purchasing, we should give priority to the formal trading market, and *** choose a closer market, which is convenient for after-sales contact. In addition, retail investors with good reputation and good quality rootstocks can also be selected, but the premise is to know the basics.
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Many improper technical actions in sports are easy to cause knee joint injury. The fitting function of knee pad makes the knee joint stable during the movement, and wraps the lower end of quadriceps femoris, limiting the knee joint over-extension; The opening knee pad has a stronger restrictive effect, which greatly reduces the range of knee flexion and extension. Its good compression effect can effectively disperse the pressure on the knee and reduce the risk of sports injury.
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