Apricot trees that are left uncultivated due to tree disorder, many branches, bald guilt, overcrowded canopy, canopy closure, poor ventilation and light transmission, and the resulting parts of the apricot tree are shifted outward, and the tree vigor is strong and weak, resulting in low yield quality. difference. The pruning of this type of tree must be analyzed specifically for the specific situation, as the tree is trimmed. 1. Shaped with a tree. To prune trees, do not deliberately pursue the tree shape. For trees that are 5 to 6 meters tall and 6 to 7 meters tall, they must be "fallen" and happy to open the skylight. In the control of tree height, easy to operate while increasing the tree light, and promote the growth of the lower branch and the smaller branch. If the tree is too high, "falling" can be done twice. For a tree with a height of 5m or less, it can be transformed into a natural round shape, natural open shape, evacuation layered shape, and small crown free sparse layer according to specific conditions. 2. From less changeable. Laid-off trees do not pay attention to plastic surgery, often the number of main branches is too much, resulting in staggered overlapping crowns, canopy closure, poor ventilation and light transmission. If you want to select more branches and positions and have good positions, you should leave 5 to 6 main branches to keep them. For the remaining branches, those who use space can retreat year by year and cultivate large branches. If there is a competitor with the reserved main branch, it should be removed early. 3. From big to small. For apricots, the crowns are often too large. Branches, especially peripheral branches, have more branches and stronger growth. As a result, canopy closure occurs, and the inner branchlets naturally wither. The resulting parts move outward. To properly retract the main branch, extend the branch with weak branches and flat branches to control the increase of the main branch growth and crown diameter, and remove the outer dense branches, especially the strong branch, so that the crown becomes bigger and smaller. In order to achieve "control outside support," and improve the purpose of the light. At the same time, it is necessary to use the method of cutting and pulling the branches to develop branches within the indica to slow down the growth and promote flower buds. After the results, the indica grows back into small and medium-sized branches to make up for the bareness of the internal organs and to make the trees plump. 4. Transform the middle and small branch groups. Liberation trees are extensively managed, and unilateral extension of branches is redundant and overlapped, which increases the thickness of the leaf curtain, affects light, and adversely affects fruit quality. To reform the middle and small branch groups, we must first remove or retract the back upper branch group, followed by the retracted small and medium-sized branch groups to take the lead with strong branches, and the pendulous branches should be retracted to the strong buds to make them shorter. Rejuvenate. Imported Premium Fire Retardant Flame retardants, functional auxiliaries endowed with inflammable polymer flammability, mainly designed for flame retardancy of polymer materials; There are many types of flame retardants, which can be divided into additive flame retardants and reactive flame retardants according to their usage. Imported Premium Fire Retardant,Flame Retardant Cresyl Diphenyl Phosphate,Plasticized Flame Retardant,Flame Retardant Abs Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com
The additive type flame retardant is added to the polymer by mechanical mixing method to make the polymer flame retardant. At present, the additive type flame retardant mainly includes organic flame retardant and inorganic flame retardant, halogenated flame retardant (organic chloride and organic bromide) and non-halogenated flame retardant. Organics are some flame retardants represented by bromine, phosphorus and nitrogen systems, nitrogen systems, red phosphorus and compounds, while inorganic flame retardants are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide and silicon systems.