Apple tree spring management must do three things
Spring management of apple trees is an important stage in the annual growth cycle of fruit trees. The spring climate is generally dry, and the temperature changes are more frequent. Under such climatic conditions, how to manage the spring management of fruit trees? Professor Yang Zongzhong, a fruit tree expert from Yangling Vocational and Technical College, combined with many years of practical experience, put forward the following reference suggestions.
Control pests and diseases at the time
In recent years, fruit farmers have generally paid attention to the prevention and control of pests and diseases in the growing period of fruit trees, while ignoring the prevention and control of pests and diseases in the spring germination period. Professor Lei Zongzhong believes that the pests and pathogens in the spring before the germination of fruit trees are concentrated, and the risk of spread is low. As long as this favorable opportunity is seized, combined with cultivation measures to improve the prevention and control of fruit trees and pests, it can achieve twice the result with half the effort.
Professor Lei Zongzhong said that the main pests and diseases of apple trees include apple rot, ring rot, rust, anthrax leaf blight, brown spot, apple leaf curler, pear small heart, aphids, cotton aphid, red spider, white spider, etc. Spring is a good time to prevent the above-mentioned pests and diseases, especially it can effectively prevent the occurrence of rot, round rot, leaf blight, etc. It is also a good opportunity to kill red spiders and mites.
It is important to deal with the cold spring water management
The rural farmer said that “there is no income in the water, and more income is in the fertilizerâ€. It is also said that “the manure is heavy and does not need to ask people†to explain the importance of fertilizer water for the growth of crops such as fruit trees. Reasonable fertilizer management.
After the beginning of spring, the temperature rises greatly, and the sprouting speed of new shoots and flower buds is accelerated. At this time, the pre-flowering fertilizer should be re-raised immediately to improve the overall nutrient level of the apple tree, enhance the growth potential of the apple tree, and enhance the apple tree. The level of stress resistance, especially in response to the "cold spring cold" hazard, improves the cold resistance of flower buds, and the effect is very good. This fertilizer is mainly based on quick-acting nitrogen fertilizer, accounting for 20% of the annual fertilization amount. The fertilization time is from the end of February to the middle of March. The fertilization type is mainly fast-acting fertilizer. The principle of fertilization should be adhered to. The amount of fertile trees and young trees should be small, and the weak trees and fruit trees should have a large amount of fertilizer.
In addition, the spring drought is a natural disaster that often occurs in the northern regions. At this stage, many fruit trees in the south have sprouted, the middle is still in the bud, and there may be no germination in the north. It is best to have a watering at this time. In the south, the irrigation is best, and in the middle of the year, watering is most suitable, and the north can be delayed a little.
Fruit trees grow strong spring shears can not be less
Spring pruning mainly plays a role in weakening, so the degree of pruning should not be too heavy.
First, cut before flowering. The main role is to adjust the amount of flowers, after the flower buds sprout and before flowering, the flower bud period is the best. The order of re-cutting is to cut the mature tree first, and then cut the young tree; first cut the weak tree, then cut the tree; cut the early flowering variety, and then cut the late flowering variety.
Secondly, the late spring pruning is a part of the young apple tree that is not cut in the winter, and is left to be pruned after the late spring apple tree sprouts. Late spring pruning is a technical measure to weaken the growth potential and can only be applied on Wangshuwangzhi. In addition, pruning in late spring can not be carried out on a tree year after year. The tree is moderated and then changed to regular pruning. It is forbidden to cut on the middle or weak branches.
Finally, buds and buds. From the 40th day before the germination of the apple tree in the spring to the early stage of germination, the fangs of the small hacksaw are used to injure the buds that need to be planted. Generally, it is necessary to pick up the shoots, and it is scratched in front of the buds. When it is necessary to suppress, it is scratched at the back of the buds. After the apple tree is germinated, the back buds and useless buds on the backbone branches and auxiliary branches are erased to save nutrients. The earlier the germination is carried out, the greater the effect, the better the effect.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Stenosis Ureteral Stent,Ureteral Stent,Urethral Catheter,double j catheter
Anesthesia Medical Co., Ltd. , https://www.medicaldiverse.com