Double-low rape high-yielding cultivation techniques

First, choose a thoroughbred, focus on contiguous. It is recommended to use double-low rape varieties with high yield, high oil, and good resistance, such as Youyan No. 10, Dingyouza No. 3, and Huanghuang No. 4, in order to meet the quality standards and production conditions of pollution-free farmland. In accordance with the regional layout, the villages, townships, etc. as a unit concentrated planting.

Second, timely sowing, nurturing strong seedlings. The plots with fertile soil, convenient irrigation and drainage, and non-cruciferous vegetables were selected as seedbeds. The ratio of seedbeds to fields was 1:5-6. Fine soil preparation and ditching, and based on the application of basal fertilizer, Mushi Boron 0.5 kg. The northwestern region of China is selected for sowing in the middle and early September, and southeastern Yunnan is planted in the middle or late September. In the same area, the place with high altitude is early, while the place with low altitude is slightly late. Seed acres per acreage of 0.35-0.5 kg. Timely seedlings, Dingmiao. According to the seedling condition, 1000-1500 kilograms of manure or 5-8 kilograms of urea can be applied to each acre after setting the seedlings. If the seedlings are prosperous, they can use 15% paclobutrazol 30 g water evenly for 40 kg per acre at the 3-leaf stage.

Third, open a good three ditch, fine soil preparation. After the harvest, the ridges were ploughed and ditched, and basal fertilizer was applied. Dryland is generally 2-3 meters wide, rice field is generally 1.5-2 meters wide, 20-25 cm wide, 20-30 cm deep, so that "three ditch" supporting.

Fourth, timely transplanting, rational close planting. Seedling age 30-35 days to start transplanting. It is required to do "three things", "three sides" and "four plants and four plants". The "three majors" means: The line must be planted straight, the root should be planted and the seedlings must be planted. "Three sides" refers to: taking seedlings while transplanting while planting root water. "Four plants and four plants are not planted" are: the size of the seedlings are not mixed and planted, planted fresh seedlings are not planted overnight seedlings, planted straight root seedlings do not plant bent root seedlings, planted root seedlings are not planted hanging root seedlings. According to the level of soil fertility, transplanting methods, the best transplanting density will be determined sooner or later, usually about 6000-8000 strains per mu. When transplanting, planting and pouring water will be used to remove the ground water. Mushi 1,000 kg of human and animal manure water plus 2.5 kg of urea will reduce the period of seedling sowing.

Fifth, formula fertilization, will apply boron fertilizer. After harvesting the former crop, it is necessary to use the base fertilizer in combination with site preparation. In general, the total fertilizing amount per field is 12.5-15 kg per hectare of pure nitrogen, 6-8 kg of phosphorus pentoxide, and 5-7 kg of potassium oxide. For high-yielding demonstration fields, appropriate fertilizing materials, especially organic fertilizers, should be added. Among them, 50% of the total nitrogen application, 80% of the total phosphorus and potassium fertilizers were used as base fertilizers, and the remaining fertilizers were used as topdressing fertilizers. In addition, 0.5-0.75 kg of borax should be applied at the end of each acre, and high-quality and high-efficiency boron fertilizer should be used for the foliar dressing during the seedling stage and budding period.

Sixth, control of pests and diseases in the field. Seedlings should focus on the control of cabbage caterpillars and aphids. Control of cabbage caterpillar can be used fresh red pepper 0.5 kg pounded with 5 kg of water, heating and boiling for 1 hour to take the filtrate, the higher the concentration the better. Or use 1 kilogram of fresh cucumber vines, add a little water to smash, remove the residue, and spray 3 times with water. Aphid can be used 50% of the anti-inferiority WP 2000 ~ 3000 times or 40% of giant Lei EC 1000 ~ 1200 times or 20% of a good year of 1000 ~ 1500 times emulsion of winter emulsion. During the seedling stage, artificial or chemical agents are used to control weeds according to field conditions. Weeds can be used 50% paracetamol 100 grams plus 12.5% ​​Gaifu 30 to 50 ml watered 50 to 60 kg spray control. Sclerotinia should be controlled early in the flowering period, and it should be controlled again after 5-7 days. Sclerotinia prevention and treatment can use 50% procymidone WP 50-75 grams per acre, or 25% prochloraz EC 40-60 ml, or 50% Pythium flummetone WP 130-180 g, watered 50-60 kg spray.