Cauliflower cauliflower, also known as cauliflower, is widely cultivated in China because of its rich nutrition and delicious flavor. Cauliflower is a cruciferous plant that is a variant of cabbage. The cauliflower is divided into three types: early, middle and late-maturing. The planting method adopts the method of first seeding, followed by transplanting. The growth cycle is long and the yield is high. It needs to absorb a considerable amount of nutrients for its growth and development. Because of its own special growth, it requires stricter living conditions than other cabbages, and it also has strict requirements for fertilizer. Only by satisfying its requirements for living conditions and nutrients, can it achieve higher yields and better quality. Quality.
Cauliflower fertilization, in particular, should pay attention to nitrogen, phosphorus, potassium, boron, molybdenum, five kinds of nutrients sufficient supply and balance ratio. The specific plan is as follows:
First, seedling fertilization:
The cauliflower was planted by transplanting seedlings. The nutrients required for seedling growth were derived from the organic fertilizer added to the seedbed soil and the seedling nutrient soil and a small amount of quick-acting fertilizer. Nutritional soil formula: clean garden soil 70%, organic fertilizer (fully cooked and sieved) 30% superphosphate, 2-4 kg / square, compound fertilizer 2 kg / square. According to this recipe, the nutrients contained in the nutritious soil are sufficient to meet the growth needs of the seedling stage, and no additional fertilizer is required.
Second, planting base fertilizer:
Prior to planting, the N, P, K, B and Mo nutrient contents in the soil (except acid soil may be measured) were measured, and the base fertilizer and periodic top dressing application schemes were arranged according to the results. Generally need to apply organic fertilizer 3500 kg / acre, urea 5-20 kg / acre, potassium sulfate 5-15 kg / acre, superphosphate 0-30 kg / acre. Fertilizers and organic fertilizers are well-mixed and applied to the ground.
Third, top dressing:
1. During the period of rosette dressing: after the cauliflower grows slowly, it enters the rosette stage, and on the basis of applying low-fertilizer, it applies a small amount of fertilizer: 10 kg/mu urea, 5 kg/mu potassium dihydrogen phosphate, and appropriate amount of human waste.
2. For the first time, ball fertilizer: When the diameter of the flower ball is increased to about 3cm, the first ball fertilizer is chased: ammonium sulfate 10-25 kg/mu, potassium sulfate 5 kg/mu, combined with watering.
3, the second ball fertilizer: in the middle of the ball, Mushi 5-15 kg of urea, pouring manure once.
4. The third ball-bearing fertilizer: Generally, early and medium-maturing varieties do not need to be top-dressed for the third time, while late-maturing varieties will have 3 times to recover the fat. The amount is the same as the second time.
Fourth, trace element application:
With particular emphasis on the application of boron and molybdenum fertilizers, effective boron below 0.8 ppm in soil, and effective molybdenum below 0.2% should be supplemented by foliar spray. 0.2% borax solution and 0.05% ammonium molybdate solution were used during the vigorous growth period and sprayed once every other week for 3 consecutive times. If the soil deficiency is particularly serious, it should be sprayed once every 3-4 days and sprayed 5 times continuously.