High-yielding Cultivation Techniques of Rape in First Season Rice Field
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Second, timely sowing Hunan northwest September 5-15, Hunan, Central and South September 10-20 seeding, sowing rate per acre 0.5-0.8 kg. Before planting, the seedbed should be fully stocked. The fertile soil should be selected. The convenient place for irrigation and drainage should be the seedbed. The ratio of seedbed to field should be about 1:8. Secondly, the base fertilizer must be applied, and 50 tons of soil-fertilizer should be applied per mu, 40 kg of superphosphate, and borax. One kilogram is used as base fertilizer. Before seeding, the seedbed is poured with enough water; the third is to make good chemical control to prevent tall seedlings. When the rape is 3-4 leaves, it is sprayed with 15% paclobutrazol 50 grams per acre 50 kg per acre.
Third, nurture strong seedlings
(1) Drought and moisturizing promote Qimiao. To achieve "three wet" sowing in the dry season (seed wet, seedbed wet, cover species gray wet), sowing seedlings must maintain seedbed moist.
(2) and time Miao Dingmiao strong seedlings. 2-3 leaves during the seedlings, 4-5 leaf stage Dingmiao. When thinning seedlings, it is necessary to “go small to stay large and stay weak and stay strong†so that “leaves do not overlapâ€. In the three-leaf and one-hearted mu, 15% of paclobutrazol 1 was sprayed with 100 pounds of water (due to severe drought).
(3) timely recovery of fat to promote early hair. At the beginning of the 2-3 leaf period, fertilizer is applied, so that “the four leaves are tender and the four leaves are robustâ€. General use of 25 tons of human and animal fecal water or water per acre with 10 kg of urea poured.
(4) Strengthen the control of cabbage caterpillars and aphids.
Fourth, 8000-10,000 strains per mu of transplanted paddy fields should be planted in close range. According to the fertility of the field and the sowing date, the density, fertilizer field, and early sowing field should be adjusted.
Fifth, scientific fertilization
(1) Apply base fertilizer. Apply 3-4 kg of fertiliser per acre, 100 kg of 45% rapeseed compound fertilizer, 30 kg of boron fertilizer, 8 rapeseed partners or half a catty of boron fertilizer.
(2) Apply Miao Fei early. 7-10 days after transplanting, 10-15 kilograms of urea and 12 kilograms of potash fertilizer are used. In the middle and late November, 15-20 kilograms of urea are used.
(3) Reapply wax fertilizer. In mid-December, mu for 2-3 square soil miscellaneous fertilizers or 20-25 for human or animal manure or 30 kg for rapeseed compound fertilizer.
(4) Increase boron fertilizer. The quick-acting boron fertilizer was sprayed once during the bolting period and the early flowering period.
VI. Integrated control of diseases and weeds
(1) Chemical weeding. One is that 1-3 days before transplanting, mu is sprayed on the seedbed and the surface of the seedlings with 90% of Kunsei EC 1 and 2 of 3 water evenly. Second, 7-10 days after planting and mid-November, we use 10.8% of high-efficiency grass covering for grassy weeds to spray 3 barrels of water in 3 packets. Mu with 2 packs of broadleaf weeds.
(2) Pest control. Insect pests mainly prevent cabbage worms and aphids. Mu shall be treated with 10% imidacloprid 2 (0.82) watered and two barrels of water shall be sprayed to cure aphids. Mu shall be treated with 5% high efficiency cypermethrin EC 2 or 20% or 50% methamidophos EC 2 to cure cabbage caterpillars. Sclerotinia mainly takes precautions. First, after the spring to clean up the three ditch, in late March, timely removal of old yellow leaves; second, in the early flowering period of mu with 2 more than 2% of Dailian water 100 kg spray.
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