Postharvest nitrogen supplementation

Protecting the leaves after harvesting of the grapes enhances the photosynthetic capacity of the leaves and plays an important role in increasing the storage nutrients of the trees.

Apply post-harvest fertilizer. After fruit harvesting, quick-acting nitrogen fertilizer can be applied in the case of many results and weak tree to enhance photosynthesis and restore tree potential in later stage. Apply about 12 kg of quick-acting nitrogen fertilizer per acre , or spray 0.3% urea solution on the foliage , and spray 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.

Apply base fertilizer early. Facilities into the basal time to late September, mid-October at the latest before the grape leaves as the most suitable. Base fertilizer organic fertilizer, with P fertilizer, organic fertilizer mu (manure) from 3000 to 5000 kg, 50 kg phosphorus. At this time, the root of the root growth period is easy to heal. The combined root fertilization can cut the fine roots and play the role of root pruning. It can promote many new roots in the same year, and can absorb the nutrients in the soil in the 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 in the same year, which is beneficial to the germination and early new shoots in the coming year. Growing.

Control pests and diseases. There are mainly downy mildew, black pox, rust and so on. Grapes should still be protected from downy mildew after picking fruit. You can use 200 times half-volume Bordeaux mixture, 50% gram-free WP 500 times, etc., spray once every 10 to 15 days. If a lesion occurs, it should be sprayed with 700 times of syphilis WP or 250 times of defrosting .