Rapeseed can be produced from the end of autumn to the following spring, which is a traditional source of increasing income for farmers who invest less in the cost of labor. In the winter, the rapeseed grows slowly and the price is high. Therefore, the high yield of rapeseed in winter is especially important for farmers' friends.
First, planting should be in China. The best seedlings were 4 to 5 leaves when planting, and 25 to 30 days after emergence in winter. Slowly took root early and delayed growth. Should choose organic fertilizer with high content, convenient irrigation and loam cultivation.
Second, fertilization should be uniform. Combine 2,000 kg of organic fertilizer in Mushi, 30 kg of superphosphate, 15 kg of urea and 30 kg of potassium sulfate as base fertilizer, or 90 to 120 kg of organic compound fertilizer, or 40 to 60 kg of compound fertilizer. Mix the soil and fat and make it flat. After planting the seedlings, fertilizers were promptly applied and the seedlings were cultivated immediately. After the seedlings are finished, they are topped with fertilizer in time. Generally 5 to 7 days topdressing once liquid fertilizer, 1, 2 to 3 days after seedling planting new roots, can be applied 20% of human excrement (without slag), or urea 10 kg; 2, plant buds, chase Application of 30% to 40% of human waste, or application of binary compound fertilizer or urea about 20 kg; 3, most of the main wolfberry harvest, topdressing 40% to 50% of human waste or nitrogen, phosphorus compound fertilizer or urea 10 kilograms to promote the development of lateral gills. In principle, fertilizer should be topdressed after each harvest.
Third, the soil should be wet. During the whole development period, the soil is kept moist and the soil is too dry. This not only reduces the yield and quality, but also prone to viral diseases. If it is too wet, it is susceptible to soft rot. Before entering the winter, control the fertilizer and water to avoid excessive growth and be prone to frost damage.
Fourth, prevention should be strict. The main diseases are downy mildew, soft rot and black spot, etc. The pests are aphids, cabbage caterpillars, Spodoptera litura and so on. Soft rot can be used for agricultural streptomycin, Preco control; downy mildew can be chlorothalonil, Anker and other prevention and treatment. Black spot can be sprayed with Triflum, Propene and others. Aphids, cabbage caterpillars, Spodoptera litura, etc. can be controlled by such agents as imidacloprid, Aketai, and Dinglong (Tai Ci Bao).
Fifth, suitable for harvesting. Dishes include main and side dishes. The main cultivars were mainly cultivars of early maturing varieties, and the main cultivars of middle and late varieties were both harvested. When the dish is higher than the leaves, the apex has been harvested before it can be harvested. The dish grows to 30 to 40 cm. It is harvested at the beginning of the flowering period. When the main pods are harvested, a few axillary buds must be kept at the base to ensure that they are thick.
Expert Reviews
Rape should not be used in conjunction with cruciferous vegetables. Rapeseed meal and cruciferous food habits are similar, continuous crop residues and accumulation of bacteria, mutual infection. When harvesting, it is best to use a knife, the incision is slightly tilted, so as not to cause accumulation of fertilizer and water and cross-section is not neat to cause soft rot disease; every harvest of vegetable vines best sprayed on the first time streptomycin sulfate liquid, timely fertilizer.
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