Special interview with this reporter: Expert of the expert group of this newspaper, Liu Zhande, associate professor of the College of Horticulture, Northwest A&F University
At present, it is the key period for the expansion period of kiwi fruit and the determination of fruit quality. It is also the peak period of fertilizer demand and the most serious period of pest and disease hazard. It is essential to grasp the management of this period. Liu Zhande, an associate professor at the College of Horticulture of Northwest A&F University, said that during this period, it is necessary to timely fruit-sorch, fruit-expanding, and control pests and diseases, irrigation and weed management.
Timely fruit thinning 15 to 20 days after fruiting, fruit thinning, first sparse pollination of poorly deformed fruit, pests, fruit, fruit, small fruit, etc., while retaining the fruit stems strong, well-developed normal fruit; As a result, the length of the branches adjusts the number of fruits, generally 3 to 4 long healthy fruit branches, 2 to 3 medium-sized fruit branches, and 1 fruit in short fruit branches. During the fruit-bearing period, the average kiwifruit is 23,000 to 25,000 per acre, and the number of Chinese kiwifruit per acre is 24,000 to 28,000. In view of the unsatisfactory fruit set in some orchards this year, different measures should be taken according to the growth and results of fruit trees to timely eliminate the pollinated fruits.
Topdressing in early June, the application of organic whole nutrient fertilizer 200 kg per mu, or 1 kg of NPK compound fertilizer per plant, plus 0.5 kg of microbial fertilizer.
Irrigation in June is the critical period of kiwifruit water demand, water supply must be guaranteed, in order to meet the growth of kiwi fruit, should be timely irrigation according to soil moisture, combined with fertilization, conditional orchard implementation of water and fertilizer integrated fertilization. The irrigation should be avoided at noon, otherwise the ground temperature will decrease rapidly and the tree will be wilted.
After the pest control and control, the whole plant is used once, mainly to prevent pests such as cockroaches, spotted wax mites, oriental small salaries and brown spot. The agent can be selected from 2.5% cyhalothrin 2500 times solution, and the agricultural anti-120 or polyclonal anti-mycin is 800 times.
Biological control In the middle and late June, the whole garden artificially released predatory cockroaches to control red spiders. Generally, each kiwifruit can be hung with a bag and hung in the branch of the branches.
The scientific summer shears in the first half of May this year, the low-temperature rainfall weather, is very unfavorable for the pollination of kiwifruit, causing some orchards to have poor fruit setting and strong shoot growth. The dense branches and entangled branches should be removed to maintain the balance of vegetative growth and reproductive growth. At the same time, the vines should be evenly affixed to improve the ventilation and light conditions. It is better to distribute the shades evenly under the shelf at around 12 noon.
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