After a year of growth, the apricot flat tree consumes a large amount of nutrients. After the fruit is harvested, it is necessary to strengthen the tree management in time to supplement the nutrients required by the tree. This promotes flower bud differentiation and increases complete flowering rate. And improving the fruit-setting rate in the second year has a positive effect. Specific management measures are as follows:
First, protect the leaves and strengthen pest control. After harvesting, the photosynthetic nutrients in the leaves were mostly used for late flower bud differentiation and accumulation of reserve nutrients. Therefore, protecting the leaves and preventing pests and diseases is crucial for prolonging photosynthesis time and increasing photosynthetic products.
The pests that cause damage to the leaves are mainly aphids, red spider mites, and early defoliation diseases. The control of aphids can be achieved by 20% speed killing and 2000 to 3000 times liquid spray, red spider 40%, and water amidophos 1200 to 1500 times spray. Prevention and control of early defoliation can be sprayed with 40% carbendazim WP 800 times and other fungicides. Apricot cures, is found at any time, cut off at any time.
Second, summer pruning, open up the light path. Gradually cut dry branches and branches and cut off branches and branches. After the result, the result is significantly weak and drooping. The result is a proper retraction, shrinkage and clipping to the branches of the head or the branches; the growth branches of the leggy branches that grow in the crown can be carried out. For example, if there is no space for growth, remove the stems, pull branches, etc., and remove them in a timely manner. For an early growth tree with stronger growth potential, the upright branches on the tree may adopt measures such as support, pull, and fall to change the growth direction and promote the results. At the same time, for the main lateral branches with smaller angles, the branches should be pulled so that their angles reach about 70 degrees.
Third, strengthen soil and fertilizer water management, improve the tree's nutritional conditions.
1. Loose soil: Apricot trees should be cultivated and retrenched after the fruit is harvested. The depth of the cultivator is generally 5 to 10 cm.
2. Deep ploughing: Deep ploughing can improve soil physical and chemical properties, enhance soil permeability, and promote the conversion and absorption of organic matter in the soil. The depth of general deep plowing is appropriate in the range of 30-40 cm, shallow in the near stem and deeper in the far stem. Deep plowing can be combined with organic fertilizers.
3. Fertilization: After apricot trees are harvested, a quick-acting fertilizer should be applied immediately. Each mature tree can be topdressed with 0.5-0.75 kg urea or 0.75 kg diammonium phosphate, and watered immediately after application. Top dressing should be done in small amounts and apply in soil below 15 cm. Before autumn deciduous apricot basal fertilization (from September to October), the basal fertilizer is mainly composed of high-quality farmyard manure, mixed with a small amount of potassium phosphate fertilizer, and applied to the vertical projection of the outer edge of the canopy from 30 to 50 cm in the soil. Generally 5 to 6 years of the initial fruit period, apricot tree strains of farmland fertilizer 30 to 50 kilograms, superphosphate 0.3 to 0.5 kilograms; fruit period apricot tree strains of farmland fertilizer 60 to 100 kilograms, superphosphate 0.6 to 1.0 kilograms. In combination with the control of pests and diseases, foliar spraying of 0.3% potassium dihydrogen phosphate solution 2 to 3 times, watering after fertilization.
4. Drainage: Apricot trees are not tolerant to radon. If there is more rainwater or water accumulation, they should be excavated in time.
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