Right now, it is the key period for the management of kiwifruit. He Bingrong, director of the Huayou Kiwi Industry Professional Cooperative in Zhouzhi County, Shaanxi Province, recommends that the fruit growers should strengthen their management of fertilization, fruit thinning, and pest control during the fruit period to lay the foundation for the autumn harvest.
Fertilizer management
Drainage In August, more rainfall was concentrated and it was extremely important for the park to drain. Check the situation of stagnant water at any time, clear the ditch, and reduce damage to the root system due to accumulated water, high temperature, and excessive humidity.
During the drought-proof period, the temperature is too high and the water evaporation of the tree is too large. As a result, the tree vigor weakens due to loss of water, and premature leaf loss occurs, which directly affects fruit development and nutrient accumulation and transformation. At the same time, it also affects flower bud differentiation and slow growth of saplings. According to the actual situation should be taken to drought and moisturizing measures (watering, covering).
During this period of time fertilization continued to increase fertilizer. It can continue to be carried out according to the June-July fertilization plan. The high-potassium compound fertilizer 150-200g/strain (except early-maturing or soon-to-be-picked varieties) can be applied to the hanging fruit trees. The high-nitrogen fertilizer can be used twice for the young trees and the amount can be 100g/plant. The fertilization interval is about 20 days. At the same time, the continued use of foliar fertilizer is also the key to keeping the leaves.
Tree Management
The results showed that the growth of shoots was slow, and only the shoots of the late autumn shoots were observed. For example, the early shoots were grown in an appropriate position and used to maintain the tree structure, while the rest were erased (including shoots sprouted in late autumn). For the overly thick tree of the leaf curtain layer, proper pruning will be carried out to achieve ventilation and light transmission, so as to increase the tree's effective demand for light and heat and enhance fruit quality.
Saplings take full advantage of the second peak of growth (8 to 10 months) to cultivate tree skeletons.
At the same time, attention should be paid to the protection of leaves, focusing on drainage, drought resistance, foliar fertilizer application, pest control (suspension of early-maturing varieties, and fruit picking). In addition, picking up fruits in a timely manner, the park picks fruit once every two weeks and brings them out of the park.
Pest control
Focus on the control of brown spot, stink bug, red spider and other pests and diseases, insecticidal lamp, artificial capture and other physical methods can be used to prevent and control. At the same time, to be combined with chemical prevention, it is possible to use 25% of 14% Fuchs (chlorinated chlorofluorocarbons) + 29% of Chloroquine 2000 times, or 20% of Fukuro 2000 times + 40% of fluorosiliconazole (Fuxing) 8000 times Liquid spray. Pay attention to the spraying time should be carried out after 5 pm or evening. Use strictly in accordance with the instructions. Do not increase the concentration arbitrarily to avoid phytotoxicity. 20 days before fruit ripening, pesticide use was stopped.
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