In the early stage of the growth of kohlrabi, it is necessary to dilute phosphorus and phosphorus to control potassium. The specific practices are as follows:
When planting kohlrabi, apply 80-100 kg of calcium or calcium-magnesium-phosphorus fertilizer per mu as base fertilizer, spread the phosphate fertilizer evenly on the land where kohlrabi is planted, then plow the plough and arrange it into sorghum, so that the phosphate fertilizer is in full contact with the soil, and then Planting. After the germination of the kohlrabi seedlings, the nitrogen and phosphorus fertilizers should be applied every 7 to 10 days for 2 to 3 times, 8-10 kg of urea per acre, 5-6 kg of diammonium phosphate, and water or biogas slurry or mash. The mature human and animal manure water is made 60-80 times and then drenched. In the middle and late growth stages of kohlrabi, nitrogen and potassium fertilizers should be applied every 10 to 15 days for 3 to 5 times. Each time, 15 to 20 kilograms of urea per acre and 10 to 15 kilograms of potassium sulfate should be applied to the water or biogas slurry or tart. The human and animal manure water is 50 to 60 times and then drenched.
In addition, in the early stage of growth, it is also necessary to spray 2 to 3 times of 0.2% urea and 500 times of microbial active phosphorus mixed solution on the foliar surface, and spray once every 7 to 10 days. In the middle and late growth stages, 0.2% urea and 500 times of polymerization active potassium mixed solution were sprayed every 7-10 days, and sprayed continuously for 5-6 times.
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