Different apple varieties, such as dryness, germination rate and branching rate, have different susceptibility to pruning, so different apple varieties have different pruning methods.
1. Ordinary Fuji line. Ordinary Fuji-type saplings grow vigorously with strong dryness and open branches. Sensitive to pruning, high bud rate and strong branching ability, 5-6 medium and long branches can be drawn after cutting in the branches. Yi Chenghua has the habit of flower buds and has good yield. In the early fruit period, the results of medium and long fruiting branches are the main results. After a large number of results, the results of medium and short fruit branches are dominant, the fruit setting rate is high, and the ability of the secondary drill shoots is strong, but the continuous result ability is low, and the phenomenon of large and small annual results is prone to occur. Therefore, ordinary Fuji saplings are mainly light sheared. Except for short stem extension stems, they are basically not short-cut, and the oblique branches and drooping branches are slowly laid flat to adjust the angles of the stem branches and other branches in time. In the growing period, measures such as budding, girdling, pulling branches, twisting tips, and picking the heart are adopted to promote flowering results. Fruit trees should be timely retracted drooping branches and thin branches, rejuvenation and renewed branches, cut in the middle, long fruit branches, reasonable thinning flowers and thinning fruit, in order to obtain high quality and high yield for successive years. In order to cultivate the branches and groups, we must first slow down and shrink them. After the general results, we can see that the fruit stage is retracted, the weak branches can be seen to have flower retraction, and the mean tree branch can be trimmed.
2. Spur-type apple varieties. Most short-stem cultivars have erect branches, compact and tight crowns and dwarf trees, suitable for dense planting. The germination rate is high. The first-year and second-year planting is moderate, and the resulting branching force is very low. For this reason, for short-stemmed apple cultivars, it is appropriate to cultivate short-crown trees, such as spindles and cylinders, and they must be cut and trimmed consecutively for 2-3 years to induce long branches and form crowns as soon as possible. Open the backbone of the branch. After the basic shape is formed, the whole tree is laid slowly to promote flowering results. After the results, attention should be paid to preventing crown canopy closure, removing erect and overlapping branches and crossing branches on the back. Appropriately retract long branches and long branches, and cultivate medium and small branches. During the fruit period, it is necessary to pay attention to controlling the yield, eliminating excessive flower buds or inflorescences and avoiding the phenomena of size and annual results.
Imported Bio-based Plastic Additives
Plastic additives, also known as plastic additives, are compounds that must be added to polymers (synthetic resins) to improve their processing properties or to improve the properties of the resin itself. For example, in order to reduce the molding temperature of PVC resin, to make the product soft and added plasticizer; Another example is to add foaming agent in order to prepare light weight, anti - vibration, heat insulation, sound insulation foam plastics; The thermal decomposition temperature of some plastics is very close to the molding temperature, and the molding cannot be done without adding heat stabilizer. Therefore, the plastic assistant agent occupies a particularly important position in the plastic forming process. A class of auxiliary agents for plastic molding products, including plasticizer, heat stabilizer, antioxidant, light stabilizer, flame retardant, foaming agent, antistatic agent, mildew agent, colorant and whitening agent (see pigment), filler, coupling agent, lubricant, mold release agent and so on. Colorants, brighteners and fillers are not special plastics chemicals, but the general use of materials.
Imported Bio-Based Plastic Additives,Hobum Elo Plasticizer,Arkema Elo Plasticizer,Polar Elo Plasticizer
Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com