The cold winter has come, and there are higher requirements for fruit tree management, because it is related to whether the next year is a good harvest. Severe cold will cause certain harm to the kiwi fruit tree. Frozen may cause tree body disease and affect the growth and yield of the kiwi fruit tree. The tolerance of kiwi fruit to extreme temperatures is different in different development stages.
Dr. Jing Zhaobin, Dean of Weinan Fruit Industry Research Institute, has been engaged in scientific research related to kiwi fruit for a long time, and he has put forward some suggestions for the majority of kiwi fruit growers.
In terms of winter pruning, it should start in mid-December and end in January of the following year. Adopt a "V"-shaped tree shape, change the shelf with multiple main vines to single-main vine, with fewer branches and long branches at one time, and change the short cut and long branches to more buds and fewer branches. And after pruning, apply medicinal liquid to the wound in time to prevent germs from invading. At the same time, the "8"-shaped method is used to tie the vines of fruit trees.
Regarding the whitewashing of the orchard, Jing Zhaobin said: “This step should not be lazy. The orchard should be cleaned from the end of October or November. The fallen leaves, rotten fruits, discarded fruit bags, weeds and weeds in the garden should be cleared. The diseased branches should be removed in time to prevent harmful germs from growing in the orchard, which is extremely detrimental to the later management." After the garden is cleared, 5 Baume lime sulfur mixture is used to spray the whole garden to completely eliminate the diseases and insects in the budding state, and then use quicklime to add A small amount of lime-sulfur mixture is mixed with water to whiten the fruit tree, and the main stem and main vine should be the mainstay.
In order to prevent freezing damage, fruit growers should pour frozen water once before freezing, and pour 30-40 cm of soil on the roots and stems of the kiwi tree, and wrap the trunk up from the ground with plastic film about 50 cm. If there is a lot of snow on the vines in the later stage, it should be cleaned up in time to prevent frostbite and crushing branches.
The scion storage of kiwi fruit in winter should be divided into small bundles according to different varieties, strains, female or male plants, labeled, and stored in moist sand or buried in cellars. Special attention needs to be paid to moisturizing, keeping fresh and preventing mildew.
Jing Zhaobin said: “Fruit tree management is a very tedious process. Every step needs to be strictly controlled and implemented by fruit growers. The application of basal fertilizer in autumn before winter is also a very important link, which determines whether the fruit trees will have sufficient nutrition and healthy growth in the coming year. Therefore, if you want to have good fruits, you must make corresponding efforts."
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