Rape science fertilization and yield increasing technology

　 Fertilization of rapeseed must be rationally applied according to the fertility characteristics, nutritional characteristics and fertilizer requirements of rapeseed. Rapeseed is needed more fertilizer crops, the higher the yield, the more need fertilizer, but fertilizer is not better, but not too much fertilizer will cause the appropriate cuts. According to the different fertilization characteristics of rapeseed, the fertilization of rapeseed is divided into base fertilizer and top dressing. The base fertilizer is to meet the needs of seedling growth and to be absorbed and utilized throughout the reproductive process. Topdressing is to supplement and coordinate the demand for nutrients in the whole growth process of rapeseed.

Base fertilizer: mainly based on organic fertilizer, with appropriate amount of nitrogen, phosphorus and potassium fertilizer. Generally, the application of the red Akan series of compound fertilizer is 30-40 kg and the urea is 10 kg. If you plant double-low rapeseed, you need to apply 1.5 kg of borax per acre when applying the base fertilizer .

Top dressing: It should be applied when the stolon is about 10 cm high . In the medium fertility soil, 10 kg of red compound fertilizer and urea are applied per mu , or about 15 tons of manure .

Appropriate amount of applied fertilizer, can make rapeseed more strong, increase grain and gain weight. The flowering and pod-forming period of rapeseed is longer. When the symptoms of de-fertilization are found, it should be timely applied with 1 kg of compound fertilizer and 100 kg of external fertilizer , or 300 g of urea mixed spray in 0.2% potassium dihydrogen phosphate solution .

Rape flowers do not realize the physiological diseases caused by boron deficiency. The application of boron fertilizer can play a preventive role, which is more important for hybrid rapeseed and high quality rapeseed. Generally, it is sprayed once in the flood season and the initial flowering stage. Each time, 50-100 grams of borax is used , first dissolved in hot water, and then sprayed on 50-60 kilograms of clear water , which can greatly improve the seed setting rate and increase the yield of rapeseed.

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