New Varieties and New Techniques of Nectarine Suitable for Promoting Early Cultivation in Greenhouse (2)

After spreading, it plows 25-30 centimeters, so that the soil is settled. For greenhouses with a short production life, only the soil at the planting hole can be replaced and applied to the farmhouse fertilizer. Planting seedlings First, the selected seedlings are planted in woven bags and managed according to the greenhouse management technology. After the fruits in the greenhouse are harvested, the old trees are eliminated, and the soil is changed and fertilized, the seedlings that are pre-planted in the woven bags are planted. Move into the greenhouse, remove the woven bags, and replant. If the outside temperature is high, shade the net or put some grasshoppers to shading, and timely watering to ensure the survival rate. The large trees moved by transplanting big trees can be obtained in two ways: first, colonizing with nutrition bags or other containers in advance, and planting them in the field, and finally completing the plastic surgery according to the plan of planting the position of each seedling in the greenhouse; It is directly planted in the field and completes the shaping. Transplanting large trees can be carried out in the greenhouse after fruit picking, or in the early spring before freezing to the bud (from early March to mid-April). The difference is that trees transplanted after harvesting have been planted. If the management of unsatisfactory survival rate is difficult to guarantee, the shifting tree guarantees a year's output. But before the budding tree is transplanted and the work of pulling out the trees is done in the previous year, there is no production for a year, but it can ensure survival. Whenever the tree is moved, the roots of transplanted trees are more damaged and the recovery ability is weak. In order to ensure the survival rate, we must be more careful and thorough than transplanting the false planting seedlings. The following measures should be taken for the transplanting of large trees directly planted in the fields: One year before transplanting, digging a ring-shaped groove cuts the roots of the trees ready for transplanting. From March to April or from September to October of the year, take a radius of 50 to 70 cm outside the trunk and dig a 15 to 20 cm wide and 30 to 40 cm deep groove to cut off the root system. For larger roots, cut the wound with a scissor (cut the mouth downwards), then mix and fill the ditch and water with garden field topsoil and soil dung to facilitate the production of more new roots and improve the survival rate and growth of transplanted trees. Potential. This is the most important technical measure to increase the survival rate of transplanting trees. If the soil is dry during transplanting, it should be irrigated 2 days in advance. After the soil is slightly dry, it is dug a little at the pre-cut root. Protect the lateral roots when excavating trees. The radius of the excavated soil should not be less than 5 times the diameter of the trunk. After the roots are trimmed and trimmed, straws or grass bags are used to wrap the earthworms and then transported to the greenhouse for planting. Use muddy roots to protect or spray rooting agents when planting trees that cannot be soiled. The planting hole is larger than the radius of the roots of the excavated tree, and the center is slightly taller, so as to stretch the root system. When planting, first put a layer of loose soil, put the tree into the hole, straighten the root system, and then fill in the solid, especially the gap in the lower part of the soil shall use wood sticks to consolidate the soil, so that the root and the backfill full contact. After planting, post-planting and filling with enough water, until the ground surface is slightly dry, cultivating and covering the mulching film, and then replenish the water in accordance with the soil moisture content, and remove the plastic film from June to July. If the tree is larger, 1-3 pillars are also used to fix it. After the tree has survived, it will be sprayed on the foliage or applied to the soil. Top dressing should be based on the principle of a few times. In the year of transplanting, the results cannot be allowed, and all flower buds must be removed. In addition, we must pay attention to the timely prevention of pests and weeding and weeding. (Quartz Research Institute of Fruit Science, Shaanxi Academy of Agricultural Sciences) (Source: Liaoning Peasant Daily)

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