During the growth of kiwifruit, most of the nutrients in the tree are used for the growth of the fruit. With the harvesting of the fruit in the fall, the nutrients in the tree are largely lost. It is necessary to fertilize the nutrients timely after fruit picking for the next year. The harvest of kiwifruit laid the foundation. In this regard, Shaanxi Mingte Fruit Industry Research Association expert An Anmin gave several suggestions for fruit growers on the application of autumn kiwifruit.
Fertilizing time

Autumn is the key period of kiwifruit flower bud differentiation. According to the different maturity of different varieties, the fertilization period is between 10 and 12 months. The time should be controlled before the leaves fall after fruit picking. The sooner the better.

During this period, the nutrients synthesized by the leaves largely flowed back into the root system, which promoted a great deal of hair growth and formed another growth peak. However, due to the loss of fruit's water regulation after fruit harvesting, a temporary functional decline often occurs. Early application of base fertilizer supplemented with proper irrigation plays an important role in accelerating recovery and maintaining leaf function and maintaining strong photosynthetic productivity. The fertilization in autumn can improve the storage of nutrients in the kiwifruit tree body, which is beneficial to the flower bud differentiation before and after the deciduous defoliation of kiwifruit and before the flowering of the kiwifruit. It is conducive to budding, new shoot growth and flowering quality, and also beneficial to pollination and fruit setting.

Fertilization ratio

After harvesting fruit, the leaves lose a lot of nutrients, and it is especially important to supply nutrients to the tree body. Spraying the 0.5% urea solution on the foliage before the defoliation can increase the photosynthesis of the leaves, promote the return of nutrients to the roots and stems, and increase the nutrient reserve.

Qiang Changmin pointed out that in this stage, fertilization of kiwifruit trees should be combined with NPK, mineral fertilizers, and organic fertilizers. Kiwifruit trees in full fruit period, the total amount of nitrogen, phosphorus and potassium fertilization per plant is 1 pound, according to the ratio of 1:1:1; mineral fertilizer is applied to every tree half a catty; the total amount of fertilization for each tree of bio-organic fertilizer should be Stay at 3 to 5 pounds.

Fertilization method

(1) Root fertilization method The root fertilization method can be applied in three ways: whole garden application, hole application and furrow application. Among them, fertilization is divided into ring-shaped groove fertilization, radiation groove fertilization, and strip trench fertilization. Irrigation water is applied once after fertilization.

(2) Foliar spraying method The method of foliar fertilizer application is to uniformly spray a certain concentration of fertilizer solution on the leaves. This method is simple, easy to use, with a small amount of fertilizer, and the fertilizer effect is fast, and can also avoid certain nutrient elements. Loss of fixation or leaching in the soil. However, it should be noted that the foliar spraying of fertilizers is best carried out on a cloudy or sunny day in the morning and in the evening when there is no wind.

Qiang Anmin pointed out that according to the current market price of fertilizer, the fertilization investment per kiwi should be kept at a minimum of 10 yuan, and the investment per mu of fertilizer should be more than 1,000 yuan.

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