Technical points of apple "double dwarfism" cultivation

Appropriate for suitable planting, large seedlings to build gardens. "Dwarfed" apples were selected in the 680-1000 meters above sea level, soil depth of more than 3 meters, water and fertilizer conditions, soil organic matter more than 0.8% Chuanxi. Hilly land, beach land, low-lying land or shallow soil layers are generally not suitable for planting "dwarfed" apples. If it is really necessary to plant "dwarfed" apples, soil replacement or ridge cultivation can be adopted according to soil conditions. The "double dwarf" apple seedlings should be selected as pure, virus-free seedlings. It will take at least 3 years for the "double dwarf" seedlings to breed. The seedlings have accumulated enough nutrients in the nursery, and the "childhood period" is shortened and the results are advanced. Reaching large seedlings into the ground and planting them with flowers can achieve the purpose of “planting in the year, flowering in the coming year, and results in the following year”. To use seedling height above 1.5 meters, stem diameter is about 2.0 centimeters, seedlings are robust, the groups are neat, the roots are intact, and the lateral roots are developed.

Line width plant density, stand cultivation. The existing traditional apple orchard cultivation, 2.0-3.0 meters 3.0-4.0 meters spacing, small row spacing, unreasonable spacing, after fruiting, the orchard closed, poor ventilation and light, the tree is not dry, inconvenient for work. Orchard production is low and quality is not good. In the long-term production, the fruit growers have accumulated the experience of “not afraid of the big crown, they are afraid to close the line”, how to reasonably increase the number of plants per unit area, increase the leaf area, maximize the use of light energy, and promote the effect of the plant population, and consider the tree. Body ventilation, light, easy to operate, machinery into the garden, wide line dense plant, stand cultivation as a new cultivation system becomes the best choice. The density of "double dwarf" apple orchards should generally be 1.5-2.5 meters and 3.0-4.5 meters. After the seedlings are planted, each shoot is equipped with a bamboo pole to straighten it up (to be removed after forming) or to set up a cement column swiftly, pulling 3-4 wires of No. 8-12, and the first wire is about 0.8-1.0 meters from the ground, and then A wire is pulled every 0.8-1.0 meters to fix the branches and cultivate the standard tree shape.

Fertilizer fertility, fertile soil to raise the roots. As the saying goes, "Tap trees first to root," soil and fertilizer water management is the basis of orchard management, "double dwarf" apple water and fertilizer requirements are very strict, need to "big and big fertilizers", from the establishment of gardens to fruiting, to comprehensively improve soil organic matter Soil fertility, organic fertilizer application, chemical fertilization, and irrigation, and where conditions permit the introduction of grass between the orchards, selection of clover, alfalfa, ryegrass, etc., when the grass grows to 30-40 centimeters, castration, Tree tray cover, establish fruit, livestock, marsh, grass cycle mode. According to the law of fertilizer requirement of fruit trees, the "Three Six Six" fertilization method was adopted, ie, soil fertigation after thawing in March, topdressing before flowering, nitrogen and phosphorus as main components, and trace elements in combination; and fertilization in June, the technology of fruit preservation and maintenance of apple trees Fruit fertilizer and flower bud fertilizer, mainly potassium, with nitrogen and phosphorus; September base fertilizer, is the most important one, fertilizer accounted for about 70% of the year, mainly organic fertilizer, with chemical fertilizers. Promote accurate fertilization techniques and implement water saving irrigation and water and fertilizer integration technologies.

Simple tree, sunny canopy. "Dwarfed" apple crowns are compact, with a small amount of tree growth and easy flowering. Compared with the traditional tree shape, there are no permanent backbone branches on the tree, there are many main branches, no side branches, few grades, large differences in grades, and obvious advantages in the center dryness. The spindle tree shape should be cultivated. The basic requirement is: dry height 40-50 cm. The tree height 2.5-3.5 meters, dry upright, distribution in the stem on the distribution of 15-25 small main branch, no interlayer, inserted empty arrangement, spiral rise, the main branch angle of 80 degrees -90 degrees, the main branch length 2.5-3.5 meters , Do not transfer between the lines, between the lines have a 1.0-1.2 meters channel, in the small main branch configuration medium and small branch group, in addition to the tree dry, no permanent branch, dynamic management, random update. The orchard is well ventilated and light-transmitting, and branches can be seen with light. The fruits are sunny, the leaves are effective, and the photosynthetic efficiency is the best. The method of pruning is mainly light shearing, multiple sparse cuts, and uniaxial extension. Sapling pruning, cultivating dry, widening differential, the main branch and the dry ratio of dry to less than 1:4 -5, the main branch extending the first time is not short cut. Mature tree pruning, timely removal of main trunks that are too thick, too long, too large, too dense, and over-prosperous in time, basically do not retract, eliminate sparsely competitive branches, speed up the renewal of branches, and leave small piles when large branches are removed. Promote the regeneration of the golden mean, cultivate loose, slender, sagging, robust result branches.

Absorbent cotton wool and cotton gauze products

Absorbent Surgical Cotton Wool,Cotton Absorbent Gauze Sponge,Sterile Surgical Sponge,Medical Cotton Wool

Shaoxing Gangfeng Hospital Products Co.,Ltd. , https://www.gangfenggauze.com