Whether the management of walnut trees after harvesting is in place or not and the quality and output in the coming year must be valued. The key points for the management of walnut trees in autumn and winter are described below. Epitalon,Amidate,Raw Epitalon Powder,Bodybuilding Epitalon Shaanxi Hongbaiyi Biotech Co., Ltd. , https://www.sxhongbaiyi.com
First, autumn base fertilizer
Walnut trees after harvest to the deciduous (north from mid-September to mid-November) are the third peak of root growth, and also the period of walnut tree recuperation and nutrient return. At this point should be combined with deep turning organic fertilizer. At this time, basal fertilization, due to higher soil temperature, soil nutrient conversion faster, the root of the wound easily healed new roots, is conducive to the accumulation of tree nutrients.
The application methods of organic fertilizer mainly include open ring ditch, radiation ditch, and whole garden applicator. Generally, 5 kg of organic fertilizer is applied per 1 kg of walnuts, and appropriate amounts of phosphorus and potassium are mixed in at the same time. Saplings apply 20 to 30 kilograms per plant. The initial result tree is 30 to 50 kilograms per tree and the fruit tree at maturity is 50 to 80 kilograms per plant. At the same time with the application of 2 ~ 5 kg of superphosphate. The amount of basal fertilizer should account for over 60% of the annual fertilization amount. It should be noted that the applied fertilizer must be fully decomposed, and no mature organic fertilizer must be used to prevent injury to the tree.
Second, watering
In combination with deep-sweeping basal fertilizer, it is necessary to pour water once before freezing in the soil. This will not only improve the soil moisture content, prevent the leap year in spring, but also promote the decomposition of base fertilizer, increase the nutrient reserve of the tree, and increase the ability of young trees to withstand cold and winter. Good for budding and flowering in early spring.
Three, autumn trim
1. Pruning time: It is best not to prune after the fall of the leaves - before the month and before the budding, before the fall of the fruit after the harvest to the fallen leaves, these two periods is the peak period of the wound flow.
2. Trimming method: At this time, the tree body is trimmed without injury, and it is appropriate to adjust the skeleton structure of the tree body. Mainly pruning large branches, eliminating dense branches, pests and branches, shading branches and back branches, retracting drooping branches. However, pruning will reduce the leaf area and affect the nutrient accumulation of the tree. Therefore, under the premise of ensuring the pruning effect, the amount of pruning should be reduced as much as possible. Other pruning work should be carried out before the second budding.
IV. Clear Garden, Pest Control
After the walnuts were harvested, they were cleared and deep-rooted to clear the diseased fruit and diseased branches and burn them together. Deep-turning can kill bacteria and eggs in the soil (deep turning can be combined with autumn fertilizing).
After the walnut tree is pruned and cleared, a broad-spectrum fungicide should be sprayed to prevent and treat pests and diseases. The spraying of the liquid medicine should be even and thorough, so that it can not only protect the wounds and branches, but also prevent the branches and branches.
Fifth, cold
An annual branch of walnut grows more prosperously, the organization is not full, and the cold resistance is poor. Therefore, in northern China (especially north of Shijiazhuang), wintering and cold-proof work must be done for the young walnut trees to prevent freezing damage and drawing.
1. For walnut trees, trunks can be painted white. In winter, the white trunks and backbone sticks are coated with whitening agent to prevent frost damage, extend sprouting and flowering of fruit trees, avoid late frost damage, prevent and treat trunk diseases and pests, and kill overwinter eggs in the bark. Whitening agent formulation: 10 parts of quicklime, 1 part of salt, 1 part of sulfur powder, 0.5 parts of vegetable oil, and 40 parts of water.
2. The saplings can be bent and buried. If the tree is not easy to bend down, it can be filled with grain stalks (or soil) in the middle, and the outer side can be cold-proofed by woven bags.
3. For newly refitted joints and annual branches, you can bind straw to prevent cold, or apply polyvinyl alcohol to prevent spring drawing.