Prevention and control measures of kiwifruit in large and small years

Kiwifruit is what we often call kiwi fruit in our daily life, which is rich in vitamins and is welcomed by many people. At present, the planting area of kiwifruit in China is still very large, but when we plant kiwifruit, it is easy to appear the phenomenon of big and small years, which is very disadvantageous to the output of kiwifruit. So how to control kiwifruit in big and small years? The following editor brings you the prevention and control measures of kiwifruit, let's have a look!

1. Reasonable load

The annual phenomenon of kiwifruit may be caused by the overload of kiwifruit trees. If the yield per mu of kiwifruit is about 2000kg, as long as a robust tree is maintained, the commercial fruit rate of kiwifruit trees can reach more than 90%. However, if there are few supporting measures for all kinds of production, it may lead to the occurrence of the phenomenon of big and small years. Therefore, the amount of fruit retained per mu should be controlled between 10000 and 18000, and the amount of branches per plant should be kept at about 15 long fruit branches. It is necessary to maintain the tree potential of kiwifruit trees and ensure stable production.

2. Fertilizer and water management

When we are fertilizing, we should test the soil and distribute fertilizer. Understand clearly the demand of various nutrients for yield per mu, and control the amount of fertilizer application after determining the amount of absorption. For example, about 0.08:0.25:0.05kg of nitrogen, phosphorus and potassium is needed for every fresh fruit produced 100kg or so. And the flying crane should also have the right amount of trace elements and organic matter. In the growing period of kiwifruit, we usually have to topdressing about four times, including fruit picking fertilizer, budding fertilizer and strong fruit fertilizer and so on. When topdressing, you can apply it with water, control the amount of water, keep the soil moist, but do not produce stagnant water, and avoid retting roots.

3. Flower and fruit retention

We also need to control the amount of flowers and fruits on Anhui fruit trees. for kiwifruit in the big year, there are about 5 strong long fruit branches, 3 medium fruit branches and 2 short fruit branches. If it is a clump of strong branches, then no fruit can be left. On the other hand, the umbrella flower fruit only retains the middle fruit and removes both sides of the fruit. In addition, it should also point out the stiff fruit, abnormal fruit and so on. Among them, the proportion of leaves and fruits of fruit trees should be kept at about 7:1. Young trees should leave less fruit, with three long fruit branches, 1-2 medium fruit branches and no short fruit branches as far as possible.

4. Proper pruning

For crown corn, fruit trees with poor permeability should be thinned in time to grow too dense, and branches and so on. In general, a fruiting mother branch should be retained about 20 cm, and branches such as thin and weak branches, pest branches and clump branches should be strengthened to be thinned from the base. Then the exchange pruning branch group should be updated after the result of the current year. If excessive application of nitrogen fertilizer leads to excessive growth of branches and leaves, then the main vine should be cut in a loop. After ring cutting, fungicides should be sprayed for sterilization to avoid excessive growth, accumulate tree nutrition and promote the formation of flower buds.

The above is a brief introduction to the prevention and control measures of kiwifruit. That's all for today's introduction. This article is for reference only. I hope it can be helpful to everyone.