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Covering film for peach seedlings
Traditional breeding methods to cultivate peach seedlings not only waste human, financial and material resources, but also have poor seedling emergence, low survival rate, and affect grafting. Since 2001, we have applied plastic mulch cultivation technology to the propagation of peach seedlings, which has enabled the emergence rate of peach seedlings to be as high as 95%. At the same time, the grafting time has been advanced to produce a large number of high quality seedlings. 1 Nursery choose nursery land to choose leeward sunny, fertile soil, well-drained land, mainly loam or sandy loam, it is best not to choose paddy soil, the previous year's winter will plow the nursery ground again, frozen in the soil Germs, pests, etc. 2 Seed treatment At the end of October or early November, the picked peach seeds will be poured into a bucket filled with warm water, warmed and dissolved in 2-5 grams of carbendazim, thoroughly stirred to remove the seeds and impurities from the floating water surface. Harvest the sinking seeds and mix them thoroughly with wet sand. In the indoor shady and high dry place trench digging, ditch depth 60-100 cm, length and width with the number of seeds. Firstly lay a layer of wet sand in the ditch, stack the seeds mixed with wet sand on it, stack it to a thickness of no more than 50 cm, and finally cover with a layer of wet sand, then cover the earth with about 50 cm, and raise the ground into a mound. It is beneficial to drainage, and the temperature and humidity should be checked frequently during the period. 3 Apply sufficient base fertilizer before ploughing and ploughing. Apply 50 kg compound fertilizer or 100 kg ammonium bicarbonate or 1000-1500 kg soil fertilizer per 667 square meters, then deepen the soil for excavation, dig trenches 60-80 centimeters in width and length. Depending on the length, the width of the ditch on both sides is about 25 cm and the depth is 15 cm, which is conducive to drainage. 4 Timely sowing The beginning of February and early March, the beginning of the seed cracking exposed white, where the seeds exposed when exposed white, sowing time by 30-40 cm, spacing 15-20 cm, open shallow trench on demand, after sowing 2-3 cm thick soil Then, it is stamped with a colorless transparent plastic film with a thickness of 0.015mm. The edges of the film are pressed with fine soil, which helps to increase the ground temperature. When the seedlings are sprouted, the seedlings grow. 5 Early grafting Seedlings began to grow in mid-April and were fertilized by drilling and fertilizing once on the membrane to promote its growth. When the seedling height is 50-70 centimeters, the base diameter is 0.4-0.8 centimeters when grafted early. Before the connection, the water should be properly watered, and the scion selection results in the middle of the woody shoots in the middle of the tree. The "T" shaped bud grafting grafting, grafting site 10-20 cm away from the ground, when grafting to retain the buds of the lower rootstock leaves, after 5-6d survived an anvil, 5-8d bud germination after timely eradication of rootstock germination . 6 Strengthen the management of seedlings growth period to the nursery, to strengthen the nursery fertilizer, water management, and pest control. When the seedling height is 30-40 centimeters, topdressing 10 kg of urea per 667 square meters, and pay attention to timely watering. In the seedling stage, pests and diseases mainly include ground tigers and various moths. 25 kilograms of water are used to spray seedlings on 5 grams of Lebensnite, which can effectively control the ground tigers and moths. When the nursery stocks are closed, the mulching film is removed and the grass is sloppy. After 25 kg of urea is applied per 667 m2, the ditch is mainly used. In late September, the fertilizer will be controlled to prevent the seedlings from prospering. For the prosperous seedlings, timely picking must be done to make them grow slowly or stop growing. In the late autumn and early winter, it is necessary to pay attention to the prevention and control of large green floating dust.