Right now, it is the critical period of kiwifruit management that fruit growers should strengthen the management of fertility, fruit thinning, and pest and disease control of kiwifruit that enter fruitful stages, laying the foundation for a good harvest in autumn.
Soil, fertilizer and water 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.
Weeding is based on the growth of weeds in the park (at high temperatures, proper retention of weeds can reduce soil temperature and reduce soil erosion caused by heavy rainfall). However, when weeds exceed 30 cm, they must be weeded. Artificial or mechanical grazing can be used. The weeds that are cut off can be covered with hummus or tree trays to moisturize and reduce the temperature. Try not to use herbicides.
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 is weakened due to water loss, and premature leaf loss occurs, directly affecting fruit development and nutrient accumulation and transformation. At the same time, it also affects flower bud differentiation, resulting in slow growth of young trees. Should be based on the actual situation to take drought and moisturizing measures (watering, covering).
This period of fertilization continued to increase fertilizer. It can continue to be carried out according to the June and July schedules. The high-potassium compound fertilizer 150-200g/strain (except the early-maturing or the soon-to-be-harvested varieties) can be applied to the hanging fruit trees. The young tree can be used twice as the high-nitrogen fertilizer with a dosage of 100g/strain. The fertilization interval is about 20 days. At the same time, the continued use of foliar fertilizer is the key to keeping the leaves.
Tree Management
Saplings fully utilize the second peak of growth (from August to October) to cultivate the skeleton of the tree. 1 Grafting seedlings: The principle of a trunk, two main vines, and multi-side vines has been implemented. The main vine has been formed with emphasis on cultivating side vines. When the new shoot grows to a certain length, it will be picked in time. When it is semi-woody, it will be kneaded with a soft base and evenly tied. Racks. Pay attention to check the release of the graft membrane. 2 seedlings: 20 cm from the ground to maintain smooth and straight for grafting; more than 20 cm to retain 2 to 4 branches, and timely picking.
As a result, the growth of the shoots is slow, and only the shoots of the late autumn shoots are noticed. For example, the shoots in the early autumn are suitable and used to maintain the tree structure. Eliminate the rest (including buds that germinate in late autumn). For the over-thick tree of the leaf curtain layer, proper pruning will be carried out to achieve ventilation and light transmission. This will increase the tree's effective demand for light and heat and promote the improvement of fruit quality.
Pest control
Focus on the control of brown spot, stink bug, red spider and other pests and diseases. 1Chemical control: 40% Fuxing 8000x + 2.5% Lambda-cyhalothrin 2500 times can be used (insecticide, bactericidal and acaricides can be selected according to the occurrence of pests and diseases). Pay attention to the spraying time should be carried out after 5 pm or evening, strictly in accordance with the instructions, can not arbitrarily increase the concentration, so as to avoid phytotoxicity; 20 days before the maturity of the fruit, stop using pesticides. 2 physical control (insecticide lamp, artificial capture).
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