How to plant rape, using post-management technology

Variety selection: varieties with high yield, high quality and high resistance are required, such as Zhongshuang 1 1, Huaza No.9 and Changza N

How to plant rape, using post-management technology

Variety selection: varieties with high yield, high quality and high resistance are required, such as Zhongshuang 1 1, Huaza No.9 and Changza No.2. Soil selection: Choose a section with loose and fertile soil, convenient irrigation and drainage and flat terrain. Application of base fertilizer: apply proper amount of decomposed pig cow dung, ammonium bicarbonate, calcium magnesium phosphate fertilizer and potassium chloride fertilizer per mu, mix them evenly before application and pile them up for about 10 day. Timely sowing: the sowing time is in the middle of September, and the sowing is carried out with borax and fireclay ash.

First, how to grow rape

1, select varieties.

Choosing a good variety is the key to high yield of rapeseed, which requires high yield, high quality ("double low", high oil content and so on. ) and high resistance (lodging resistance, Sclerotinia sclerotiorum resistance, etc.). ), such as Zhongshuang 1 1, Huaza 9, Changzayou 2 and 3.

Step 2 choose soil

Choose dry land or vegetable garden soil with loose and fertile soil, convenient irrigation and drainage, flat terrain and no rape planted for more than 2 years as seedbed. The best proportion of site area is 1: 5-6.

Step 3 Apply plantar fertilizer

Before sowing, the seedbed should be carefully arranged, and decomposed pig cow dung 1.25 tons, ammonium bicarbonate 20 kg, calcium magnesium phosphate 25 kg and potassium chloride 6 kg should be applied per mu. Before application, it should be mixed and fermented for about 65,438+00 days, combined with the arrangement of seedbed, and used as soil base fertilizer.

4, timely sowing

The sowing date of (1) rape is in the middle and early September, and 1 kg borax, fireclay ash and 0.4-0.5 kg rapeseed can be evenly mixed for sowing.

(2) Before sowing, the border surface should be kept at a certain humidity, and irrigation should be done in time in case of dry weather, otherwise the seedling emergence rate will be greatly affected. After sowing, cover with fireclay ash and spray acetochlor on the surface of the compartment when it is wet to prevent weeds from growing.

Second, the late management technology of rape planting

1, ok? Three flights?

(1) Seedling-raising fertilizer: 7- 10 days after transplanting, 2 kg of urea, 0.6 tons of farm manure and human excrement and urine should be poured per mu to prevent drought.

(2) Wax fertilizer: at the end of June, 65,438+February, 0.75 tons of pig cow dung, 1.25 tons of soil miscellaneous fertilizer, or 1 ton of fireclay ash were decomposed with farmyard manure per mu, and then 0. 15 tons of plant ash were applied in rows to loosen the soil and open ditches.

(3) Boron fertilizer: refers to the boron fertilizer sprayed before the flowering of rape, which is sprayed evenly with 0.2 kg borax and 30 kg water per mu.

2, pest control

(1) The main pests of rape are aphids and cabbage caterpillars. There are 10% aphids in the seedbed. When there are 1-2 aphids per plant, spray 40% omethoate emulsion 1000 times or 70% chlorpyrifos 1000- 1400 times.

(2) When Pieris rapae appears before 3rd instar, it can be sprayed with 50% dichlorvos emulsion or 20% pyrethroid emulsion 1000 times.

3. Prevention and treatment of diseases

(1) Rape diseases mainly include Sclerotinia sclerotiorum and seedling damping-off. In order to prevent damping-off at seedling stage, carbendazim bed soil disinfection and medicinal soil covering can be used, and pesticides such as hymexazol or triamcinolone acetonide and disinfectant alum spray should be used at the initial stage of the disease.

(2) In order to control Sclerotinia sclerotiorum, 80% carbendazim, 1000 times ultra-fine powder or 400 times 40% polysulfide suspension was sprayed on the rape field at the flowering stage in early and middle March, and the second control was carried out after 7 days.

4. Prevent early flowering and early bolting

If there is a tendency of early flowering and early moss before winter, paclobutrazol should be sprayed as soon as possible. If there are early flowers and early moss, it is necessary to pick the moss and flowers in time, and then topdressing nitrogen fertilizer according to the seedling situation, and applying about 2-3 kilograms of urea per mu.