High-yield Seedling raising techniques of rapeseed

Rape seedling transplanting is the main planting mode of rape cultivation. seedling transplanting can not only make full use of the temperature and light resources before winter, match with the late rice stubble, ensure the farming season, but also benefit the high yield of rape rice. As the agricultural proverb goes, "the seedlings are well harvested, but half the seedlings are lost." Therefore, the cultivation of strong seedlings is the basis for rape to achieve high yield. In order to cultivate strong seedlings of rape, there are five key points: seed selection, field selection, field preparation, sowing and seedbed management. Select good varieties. It is required to select double-low rape varieties with high yield, high quality and good resistance, combined with the autumn sowing variety announcement of the Provincial Agricultural Department and the actual local production, reasonably select the main varieties, and select high-yield varieties such as Guangyuan 58, Huayou Za 13 and Huayou Za 14. Carefully select varieties to avoid loss. Choose a good seedling field. It is required to select the field with flat terrain, loose soil quality and convenient drainage and irrigation as seedling field, the area of seedling bed should be sufficient, and the ratio of seedling field to field area should be 1 ∶ 5. Fine tillage and fine seedling fields. Tillage is required for 2-3 times in a week before sowing, so that the soil is fine and loose, the topsoil is flat, and the dry and wet degree is moderate. At the same time, 1000 kg of rotten organic fertilizer, 50 kg of high content compound fertilizer and 400g of holding boron (or 1 kg of high quality borax) were applied in combination with ploughing. Pull the rope to open the ditch according to the standard width of 4 feet, and the box ditch is required to facilitate drainage and seedling management. Choose to sow seeds at the right time. Dual-purpose rapeseed was sown in mid-late August, transplanting rape was sown in the first and middle of September, and direct seeding rape was sown in late September. The seeding rate of transplanting rape is 1 jin per mu, and the sowing rate of direct seeding rape is 0.4 jin per mu. Cover it with straw after sowing and water it in time in case of drought to ensure that seedlings emerge quickly and neatly. Strengthen the management of seedbed. The seedling age is generally controlled at 30 per cent for 40 days. Seedling bed management mainly focuses on five key points: drought resistance and drainage, inter-seedling determination, spraying paclobutrazol, early topdressing of seedlings, and prevention of diseases and insect pests. First, it is necessary to resist drought and protect seedlings in time after sowing, and remove the mulch in time when rape just emerges, so as to facilitate seedbed management and seedling growth. The second is to plant seedlings in one leaf and one heart, pile seedlings and crowded seedlings, and set seedlings when the third true leaf appears, generally leaving 80 seedlings per square meter and 50-60 thousand seedlings per mu of seedling bed. Third, after the seedlings were fixed in the three-leaf stage, 15% paclobutrazol per mu of seedling bed was sprayed with 50 kg of water to cultivate strong seedlings. The fourth is to apply dilute water dung after fixing seedlings combined with drought resistance. Seven days before transplanting, 3 kilograms of urea per mu was used as marriage fertilizer to enhance root vitality and promote early life and early development after planting.