Fertilization technique of rape in spring

Rape enters the peak period of reproductive growth and vegetative growth after the beginning of spring, and there is a great demand for nutrients, so it is necessary to follow up the soil, climate and fertilization before spring. So how to fertilize rape in spring? Let's get to know it with the editor.

1. Early application of spring fertilizer

The early application of spring fertilizer can promote the multi-branching and early budding of insufficient growth in winter, especially in the rape field with insufficient application of base fertilizer and no wax fertilizer, early application of spring fertilizer is the key point to win high yield. Spring fertilizer is generally applied 15-20 ammonium bicarbonate per mu or urea 6-7 key dissolved water after the application, must not be applied directly, lest thick fertilizer hurt the root, play a counterproductive.

2. Skillfully applying bolting fertilizer

The budding and bolting stage of rapeseed is the key period for the construction of spring hair, when the demand for fertilizer is great, accounting for about half of the fertilizer needed in the whole growth period. For the insufficient application of base fertilizer and wax fertilizer, the plots with weak seedling growth should be applied early and re-applied. When the bolting height is 3-5 cm, each mu can be watered with human feces and urine, urea 4-5 kg or ammonium bicarbonate 20 kg. On the other hand, the bolting fertilizer should be applied late and lightly in the land where the seedling is too prosperous, so as not to cause excessive growth.

3. Supplementary application of chemical fertilizer

Proper application of flower fertilizer at the flowering stage of rapeseed can make rape more fruiting, increase grain and weight, and play a significant role in increasing yield. When rape bolts grow to 50-60 cm, you can choose a sunny and windless afternoon to spray flowering, and for poor growth plots, you can spray 300 grams of urea in potassium dihydrogen phosphate solution.

4. Increase the application of potassium and boron fertilizer

Increasing the application of potassium fertilizer can enhance the stress resistance, cold resistance, disease resistance and waterlogging resistance of rape, but after the application of potassium fertilizer, the effect of increasing yield is obvious, generally in 2-3 months, 150-200 kg of plant ash or 15 kg of potassium chloride per mu. In addition, cauliflower can increase yield because of boron deficiency, and the application of boron fertilizer can prevent this phenomenon. Generally, it is sprayed once at bolting stage and early flowering stage, with 50-100 grams of borax per mu and 50-60 kg of water.

The above is the introduction of rape spring fertilization technology, hope to help you, want to know more related knowledge, please pay attention to us.