Medium fertility level, the target yield of 1 mu is 1500 to 2000 kg. The fertilization amount per mu of the total growth period of the kale is 2500 to 3000 kg of farmyard manure ( commercial organic fertilizer 350 to 400 kg ) , nitrogen fertilizer (N) 7 to 9 kg, phosphate fertilizer ( phosphorus pentoxide ) 3 to 5 kg, potassium fertilizer ( oxidation) Potassium ) 5 to 7 kg. Nitrogen and potassium fertilizers were divided into base fertilizers and one applied fertilizer. The fertilization ratio was 4 to 6 , and the phosphate fertilizers were all used as base fertilizers. Base fertilizer: Organic fertilizer is used as a base fertilizer for one-time application. In addition, urea is applied to 5 to 6 kg per mu , 7 to 11 kg of diammonium phosphate , and 5 to 7 kg of potassium sulfate . Top dressing: 7 to 9 kg of urea per acre and 5 to 7 kg of potassium sulfate per acre . Top dressing: Foliar application of 0.3 to 0.4 percent potassium dihydrogen phosphate.
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