Kiwifruit enters the fruiting stage, scientific management promotes high yield
At present, it is the key period for the management of kiwifruit. The fruit farmers should strengthen the management of fertilization, fruit thinning and pest control for the kiwifruit entering the fruiting stage, laying a foundation for the autumn harvest.
Soil, fertilizer, water management
Drainage In August, the concentration of rainfall was too high, and the drainage of the park was extremely important. The water accumulation should be checked at any time to dredge the ditch and reduce damage to the root system due to water accumulation, high temperature and humidity.
Weeding depends on the growth of weeds in the park (high temperature period, proper weed retention can reduce soil temperature and reduce soil erosion caused by heavy rain). However, when the weeds exceed 30 cm, weeding must be carried out. Artificial or mechanical cutting can be used, and the cut weeds should be covered in the ridge box or tree tray to moisturize and cool, and try not to use herbicides.
During the period of drought prevention, the temperature of the tree is too high, and the evaporation of the tree body is too large, which leads to the weakening of the tree due to the loss of water, and the premature senescence of the leaves, which directly affects the fruit development and nutrient accumulation and transformation. It also affects flower bud differentiation, resulting in slow growth of saplings. Drought and moisturizing measures (watering, covering) should be taken according to the actual situation.
Fertilization continued for the period of time. It can continue to be carried out according to the June and July schemes. 150-200 g/strain of high-potassium compound fertilizer should be applied to the fruit trees (except for early maturing or soon-to-pick varieties). The saplings can be used with high-nitrogen fertilizer twice, and the dosage is 100 g/plant. The fertilization interval is about 20 days. At the same time, the continued use of foliar fertilizer is also the key to leaf protection.
Tree management
Young trees make full use of the second growth peak (8 to October) to cultivate the tree skeleton. 1 grafted seedlings: the principle of performing a trunk, two main vines, and multi-side vines. The main vine has been formed to focus on the side vines. When the new shoots reach a certain length, they are topped in time, and the base is softened at the time of semi-lignification. Rack. Pay attention to check the release of the graft film. 2 Seedlings: keep 20 cm away from the ground and keep it smooth and straight for grafting; keep 2 to 4 branches above 20 cm, and pick the heart at the right time.
As a result, the shoots grow slowly, only pay attention to the buds of the late autumn shoots, such as: the early autumn shoots are properly positioned and can be used to enrich the tree structure. The rest is erased (including the buds sprouted in late autumn). Appropriate pruning of the tree layer with too thick leaf layer to achieve ventilation and light transmission, enhance the effective demand of the tree for light and heat, and promote the improvement of fruit quality.
Pest control
Focus on the prevention and control of brown spot, scorpion, red spider and other pests and diseases. 1 chemical control: optional 40% Fuxing 8000 times +2.5% cyhalothrin 2500 times, etc. (insecticide, sterilization, acaricide according to the occurrence of pests and diseases). Note that the spraying time should be carried out after 5 pm or in the evening. Strictly follow the instructions. Do not increase the concentration arbitrarily to avoid phytotoxicity. Stop using the pesticide 20 days before fruit ripening. 2 physical control (insecticidal lamps, manual capture).
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