Grape post-harvest management technical points
In actual production, many fruit farmers often relax the management of the grapes after fruit picking, resulting in poor maturity of the raw shoots in the same year, and the roots are inhibited in autumn, which affects the yield and quality of the grapes in the coming year. Therefore, strengthening the later management of the grapes is good for high quality and high yield in the coming year. Stable production is essential.
First, to protect the leaves after harvesting autumn leaves, enhance the photosynthetic capacity of the leaves has an important role in increasing the storage nutrients of the trees. In the later stage of growth, it is necessary to strictly control the use of antibacterial and sulfur preparation pesticides to prevent premature aging of leaves and reduce photosynthesis. Under normal circumstances, in addition to the Kyoho variety, the fruit should be used as little as possible after harvesting, or not on the old leaves.
Second, pruning and clearing the garden on the basis of doing the summer shear work, continue to do the topping, remove the tendrils and thin branches, remove the diseased leaves, reduce nutrient consumption, regulate the nutrient flow of the tree, promote the fullness of the buds Cooked. And remove the weeds in the garden, and cut off the diseased shoots, diseased leaves, diseased fruits, dead branches and sundries, and bring them out of the garden, buried or burned to reduce the source of pests and diseases.
3. After harvesting the harvested fat fruit, the quick-acting nitrogen fertilizer can be applied in the case of many results and weak tree to enhance the photosynthesis and restore the tree potential in the later stage. About 12 kg of quick-acting nitrogen fertilizer is applied per mu, and 0.3% urea solution can be sprayed on the foliage, and sprayed 2 to 3 times. If the tree is strong, it will be applied less to prevent the new shoots from stretching out and consume a lot of nutrients. Apply the base fertilizer as soon as possible after harvesting.
Fourth, the application of base fertilizer to the base fertilizer time is in the middle and late September, and the most suitable for the grape leaves before mid-October. The base fertilizer is mainly organic fertilizer, combined with phosphate fertilizer, and the application of organic fertilizer (farm fertilizer) is 3000~5000 kg and 50 kg of phosphate fertilizer. At this time, the peak root growth period is easy to heal, and the combined use of fertilized loose soil can cut fine roots and play a role in root pruning. It can promote many new roots in the same year, and can absorb a large amount of nutrients in the soil in early spring. substance. In the autumn, the upper part of the ground has gradually stopped growing, and the underground part is still growing vigorously. The nutrients absorbed are mainly accumulated and stored, which can improve the nutrient storage level of the tree, which is beneficial to the flower bud differentiation and enhanced wintering ability, which is conducive to germination in the coming year and further formation of flower buds. Early growth with new shoots after flowering. Due to the high nutrient level of the tree and the good quality of the flower buds, the fruit setting rate can be increased, which will lay the foundation for the high yield in the coming year.
Fifth, loose soil anti-staining and drought-proof Summer or autumn orchards are prone to weeds, and timely cultivating and weeding after harvesting. At the same time, deep turn. Deep ploughing of loose soil should be carried out between September and October, when the cut roots can heal quickly. This time, the soil cultivation is often carried out in combination with the application of base fertilizer. The general depth of cultivation is about 20 cm, which is shallower near the trunk and deeper outward. It is also possible to achieve the purpose of loosening the soil by opening the fertilizer ditch. When the rain is heavy for a long time, it is necessary to clear the ditch and drain in time. In case of autumn drought or winter drought, it should be irrigated in time to maintain the water holding capacity of the field not less than 60%, so as to benefit the soil moisture.
Sixth, the main diseases of pest control grape disease are downy mildew, black pox disease, rust and so on. August to September is the epidemic period of downy mildew, especially in rainy years. After grape harvesting, it is still necessary to continue to control the disease. 200 times half-volume Bordeaux mixture and 50% gram-free WP 500 can be used. Double spray, 65% Dyson zinc wettable powder 500 times solution, 70% methyl thiophanate wettable powder 1000 times liquid, etc., spray once every 10~15 days. If a lesion occurs, use Streptomyces WP WP 700 times or Defoiling 250 times solution, or use 50% bacteriostatic, 75% chlorothalonil 500 ~ 800 times solution.
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