Fruit trees can not stand fruit, there are three main factors, first, if you encounter low temperature frost or dry hot air during flowering, pollination will be invalid, there will be flowers without realization. Second, the nutrient accumulation after fruit harvesting is insufficient. If there are too many fruits, premature leaf senescence, photosynthetic function will be reduced, and the quality of flower bud differentiation will be poor. The third problem is that pollination trees are not properly matched and cannot be fully pollinated. The reason for fruit drop in the coloring period of kiwifruit is summarized as the following six points:
First, a single nutrition. At present, the orchards managed by fruit growers generally have the undesirable phenomenon of “heavy output, light weight, heavy inorganic, light organic, heavy weight, and slight quantity, heavy underground, and light weight.†The ratio of various elements of crops is unscientific and unbalanced. Affects the balanced absorption and utilization of nutrients by plants, and it is easy to induce deficiency diseases and cause fruit drop.
Second, serious "overload." Due to Huayou, Hongyang, Zaojin and other kiwifruit varieties, buds are dense, frost-tolerant, and budding rate is high. If you do not pay attention to brushing, topping, and thinning and fruit thinning, excessive consumption of nutrients is ineffective. Once you enter the reproductive growth period, trees The potential will gradually weaken, and it will not be possible to guarantee the necessary nutrition for fruit growth. This will inevitably cause falling, falling fruit, and even premature death.
Third, the tree tends to be prosperous. Due to excessive nutrient growth, large amounts of nutrients are consumed by shoots, resulting in insufficient stamina after fruit setting, which results in the almost complete loss of large fruits in the periphery of the fruit trees and induce ulcers in the following year.
Fourth, neglect prevention. It is very important to sterilize and spray boron and calcium after flowering before flowering. If you do not prevent and supplement nutrients in advance, the bacteria will fall from the wound where the petals fall.
Fifth, abuse of hormones. In recent years, in some places in the kiwi fruit using "big fruit", cell division is too fast, resulting in cracking of the heart, hardened brown, pulp flesh. The fruit has poor disease resistance.
Six, bagging early. Due to excessive fruiting, the proportion of leaf and fruit is seriously out of balance, and the sunburn of the fruit is serious. The fruit bagging time is generally ahead of schedule. Proposed bagging is best to avoid the hot weather, coloring the best bagging, but also can take appropriate increase in the thickness of the curtain layer, cancel the bagging.
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