The latest course of fertilization techniques for High yield of rapeseed

Rape is widely distributed in China, and it is planted in many areas. Rape is a crop that needs a large amount of fertilizer, for rape. Only with reasonable fertilization can high yield be obtained. So how to fertilize rape to get high yield? Let's get to know it.

1. Characteristics of fertilizer requirement

Rape has a long growth period, developed roots, strong absorption of fertility, and a great demand for nitrogen, phosphorus and potassium fertilizer, in which the demand for nitrogen fertilizer is the highest, potash fertilizer is the second son, and phosphate fertilizer is the least. According to the research surface, the need for nitrogen fertilizer in the seedling stage accounts for about 44% of the whole growth period, 46% from bolting to flowering stage and 10% from bolting to flowering stage. Phosphorus seedling stage accounted for 20%, bolting to flowering stage accounted for 22%, mature stage accounted for about 58%, potash fertilizer seedling stage accounted for about 24%, bolting flowering stage accounted for about 54%, mature stage accounted for about 22%. In addition to nitrogen, phosphorus and potassium fertilizer, it is also sensitive to trace elements such as boron and calcium, and its yield is not high when it is lack of boron.

2. Apply sufficient base fertilizer

The plant of rape is as high as large and needs a large amount of fertilizer, so we should pay attention to the application of base fertilizer, insufficient base fertilizer and thin seedling growth, which will affect the plant growth and the yield of rape. The basic fertilizer is mainly organic fertilizer, supplemented by chemical fertilizer. Generally, 2500-3000 kg of organic fertilizer, 25-35 kg of compound fertilizer and 0.5-1 kg of boron fertilizer are applied per mu. Organic fertilizer, compound fertilizer and boron fertilizer are applied deeply in combination with soil preparation and ploughing, and it is important to keep in mind that fertilization is too shallow so as not to lead to fertilizer deficiency of seedlings in the later stage.

3. Reasonable topdressing

In the whole growth period of rape, in order to ensure sufficient nutrient growth, in addition to applying sufficient base fertilizer, topdressing is needed for several times. In order to promote root growth at seedling stage, 300-500 kg of human feces, 5-7 kg of urea and 10-15 kg of ammonium bicarbonate should be applied per mu at seedling stage. In order to increase the low temperature and make it safe to survive the winter, it is generally necessary to apply 3000-4000 kg soil fertilizer and 20 kg compound fertilizer per mu. Before applying fertilizer, we should first plough and weed, cover straw, and finally apply fertilizer. In the beginning of spring, when the temperature warms up, rape begins to bolt. at this time, it depends on the actual situation to apply nitrogen and potassium fertilizer reasonably.

4. Supplementary application of flower and leaf fertilizer

The flower and pod period of rapeseed is longer, once it is found that there are defertilized plants, it is necessary to apply flower and leaf fertilizer in time. It can be sprayed with 1 kg compound fertilizer diluted with 100 kg water, or with a low concentration of urea and potassium dihydrogen phosphate mixed solution. 、

The above is the introduction of high-yield fertilization technology of rape. I hope it can help you. If you want to know more about it, please follow us.