To determine the seedling transplanting project, we must first determine the nursery date and the date of seedling planting based on the local climate characteristics. Our province generally raises seedlings on May 10-20, and the seedling age is generally 5-10 days, and May 15-25. Throwing plant. In normal years, the seedlings of rice seedlings planted in the rice paddies in the north of the south of the South of Yingkou in Shenyang can be carried out from May 20 to May 25. It is not advisable to postpone and postpone the throwing period. Parts of the area south of Yingkou can be advanced to May 15 or so. get on. Variety selection in areas where the frost-free period is shorter than 150 days should not be used to cast milk. For the seedlings to be transplanted, the early-maturing varieties with dwarf, disease resistance, lodging resistance, high yield, and high quality should be selected, which is about 10 days shorter than the local main cultivars. In particular, choose high-efficiency varieties that are insensitive to temperature and light. The seedling coating materials are prepared to select yellow clay and fine sand for slack farming, prepare dry straw ash, smash the yellow clay and sifting. The fine sand and dry straw ash are also sieved and finely sifted and stored for future use. The cultivation of bed milklings should be carried out in a greenhouse or a plastic greenhouse. It is required that the heat insulation be good, and the temperature and humidity be easily controlled. 5-6 days before the nursery will be leveled, do a good job. Approximately 1 meter in width, 10cm thick dry straw on the surface, and a layer of plastic woven bag on dry straw. Seed treatment in the early spring to select good weather drying. According to the determined breeding period, the salt water with a density of 1.10 - 1.13 was selected about 10 days before the nursery and the water was used for scouring. The selected seeds are soaked and sterilized with 300-400 times of Bacillus subtilis or other suitable medicaments, generally 7-10 days, and can be appropriately shortened when the temperature is high. Soaked seed, remove and control dry, wrapped with plastic cloth, high-temperature germination (25-30 °C) to the rice seed naturally breaks the chest and white. (Ma Yangrong, Shenyang Agricultural University)
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