Kiwi “little old tree” updated rejuvenation measures

There are a lot of kiwifruit gardens. After they were planted and grafted, the seedlings have been growing unsuccessfully and have not been energetic. A considerable part of the kiwifruit tree has just entered the early fruit period, there will be early signs of aging, namely: small leaves, short branches (mostly aging or self-sealing branches), no new branches, no new leaves, the knot The fruit does not inflate, and the fruit of the whole tree is "small egg." The formation of "little old trees" is mostly due to poor quality of seedlings, shallow planting, improper selection of garden sites, etc. To do a good job of updating and rejuvenating "small old trees", we must take the following measures:

Scientific fertilization After fruit picking, before defoliation, a sufficient amount of base fertilizer is applied to change the past practice of “a luck on the basis of luck, 2nd on the day, and 3rd on nitrogen and diamine”. The composition of nitrogen should be highlighted before June to promote long shoots, long leaves, and long trunks. In the period from July to October, phosphorus and potassium fertilizers should be used to promote fruit growth. The basal fertiliser from Akashi should be an all-element fertilizer with the long-term and slow-acting properties of organic fertilizers, the immediate effects of chemical fertilizers, the synergies of mineral fertilizers, and the special effects of microbial fertilizers to ensure that the kiwifruit sprouts and grows in the coming year. Needs for flowering, flowering, pollination, fruit setting. In addition, to increase the content of humus in the soil, timely supplement the trace elements and highlight the content of zinc.

Deeply turning tree plates, expanding holes, and updating the root system is the key to transforming the "old tree." Before harvesting fruit, before deciduous, at the same time of applying basal fertilization, deepen the burrowing of the burrowing hole, and combine the burrowing, cut the roots of senescent roots, promote new roots, apply organic fertilizer after cutting the roots, and immediately bury the water. .

Irrigation and soil conservation should effectively strengthen underground water and fertilizer management, do a good job in irrigation and flood protection, pay attention to multiple base fertilizers, and frequently chase nitrogen fertilizers. Due to the aging of the “old old tree”, the lack of capillary roots, and poor absorption, it is necessary to seize the top-dressing, irrigating, and water-retaining work before the Xinwangwangchang. Such as coating rods, spraying foliar fertilizer, etc., can promote new root growth and promote new roots.

Scientific retention and fruit retention For trees with severe aging, leave less flowers, less fruit, or leave no flowers or fruit, and avoid causing wounds on the backbone branches, especially if large wounds are to be avoided. The growth potential of the tree is weakened, which is unfavorable for the healthy growth of the tree.

Scientifically pruning serious, reasonable, scientific summer, autumn, winter cut, and promote control and integration. When pruning wangshu, choose to keep the middle weak branches; when pruning the weak trees, choose to stay in the middle branches; in the timely update and rejuvenation of the results of the branches, implement the "three three system" pruning method, which retains a result Branches, cultivated one year in preparation for the next year, maintain a vegetative branch.

Prevent pests and diseases before spraying fruit to spray 2~3 times 70% maggot worms 3000 times or 20% acetamiprid 6000 times, mainly to kill plagiodendron melanocarpa, tea wing larvae, small beetles, green leafhoppers, Scorpions and other pests. After harvesting fruit, the whole garden sprayed 20% Yefenzi 500-600 times or 20% thifenacetin 600 times or sprayed 15 million units of agricultural streptomycin 1000 times, or spray 0.15 diammycin 800 times Alternately sprayed kiwifruit leaves, branches and stems, sprayed once every 10 to 15 days, and even sprayed 2 or 3 times to prevent kiwifruit canker.

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