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Second, the fine soil preparation, application of base fertilizer (1) rapeseed seeds are small, in order to ensure Miao Qi Miao, must be fine soil preparation. (2) Applying organic fertilizer as the base fertilizer, about 15000 kg of pig manure or human excrement per hectare, about 450 kg of superphosphate per hectare.
Third, timely sowing, uniform broadcast shallow cover. Sowing on September 13th, the seeding rate should be 7.50- 10.50 kg per hectare. In order to guarantee broadcast and broadcast, uniform spread should be performed according to the seedbed area and tiller. After sowing, they will be covered with a thin layer of soil.
Fourth, strengthen seedbed management
1, early seedlings Dingmiao. When the seedlings to do weak seedlings to retain strong seedlings, weeds to stay pure seedlings, seedlings to keep healthy seedlings, to keep seedlings left seedlings, the seedlings between the seedlings 3 times. The first time was performed at the time of the seedlings' emergence, except for the plexus seedlings, the second time when the first true leaf appeared, and the seedlings did not leave the leaves, the seedlings did not depend on the seedlings, and the length was about 3-4 cm. Three times in the emergence of the third true leaf when the thinning, the gap between the seedlings and seedlings to 6-8 cm is appropriate.
2, drought protection seedlings. When the weather is dry, dilute the thin manure water every evening. After the emergence of watering drought, you can also furrow irrigation, irrigation to 2/3 of the trench to stop the discharge of water until the wet surface will drain the remaining water.
3, early fertilizer. After emergence of the first true leaf, use 1500-2500 kg of decomposed human animal manure per hectare, 5-6 times of water to irrigate, and apply 3000-3500 kg of decomposed human animal manure or 75 kg of urea after setting seedlings. After 5 leaves, Pay attention to control of fertilizer and water. Apply 77.5 kg of urea per hectare 7 days before transplanting.
4, chemical control. Rapeseed seedlings are planted with 75 grams of paclobutrazol for 15% of the effective amount or 300 grams of oxazole for 50% of the effective amount per hectare, and 750 kg of water is evenly sprayed on the seedlings of rapeseed, and do not spray repeatedly. It can promote strong roots, increase leaves, and shorten the stems of the rapeseed, achieve the effect of controlling and promoting the cultivation of dwarf seedlings, and is conducive to safe wintering after transplanting.
5, prevention and treatment of pests. Rapeseed seedlings are treated early, eradication of pests and diseases in the early stages of the occurrence and part of the land. The control of aphids and cabbage caterpillars is done with a 25% dilution of the emulsion 3000 times solution or a 500% dilution with 40% dimethoate emulsion 1000-1500 times.
The Breeding Techniques of Transplanting Rape Seedlings
First, choose a good plot, leaving footbed (1) rape seedbed should choose not to plant cruciferous vegetables, fertile soil, sandy nature, high terrain, convenient irrigation and drainage plots, made of 畦, 畦 width is generally 130 Centimeter, ditch 30 cm. (2) choose to do a good seedbed, to keep enough seedbed area, fine management. (3) The ratio of seedbeds to planted fields is generally 1:4-5.