potato First, the northern potato area (1) It is recommended that 11-18-16 (N-P2O5-K2O) or similar formula be used as seed fertilizer, and urea and potassium sulfate (or nitrogen-potassium compound fertilizer) as top dressing. (2) The production level is 3000 kg/mu or more, the recommended dosage of formula fertilizer (fertilizer) is 60 kg/mu, and the application period of the seedling stage to the tuber expansion period is 18~20 kg/mu, and the potassium sulfate is 12~15 kg/mu. . (3) The production level is 2000~3000 kg/mu, the recommended dosage of formula fertilizer (fertilizer) is 50 kg/mu, and the application period of the seedling stage to the tuber expansion period is 15~18 kg/mu, and the potassium sulfate is 8~12 kg/ mu. (4) The production level is 1000~2000 kg/mu, the recommended dosage of formula fertilizer (fertilizer) is 40 kg/mu, and the application period of the seedling stage to the tuber expansion period is 10~15 kg/mu, and the potassium sulfate is 5~8 kg/mu. (5) The production level is below 1000 kg/mu. It is recommended to apply 19-10-16 (N-P2O5-K2O) or similar formula fertilizer 35~40 kg/mu, and apply once at the time of sowing. Second, the southern spring potato area (1) It is recommended that 13-15-17 (N-P2O5-K2O) or similar formula be used as base fertilizer, urea and potassium sulfate (or nitrogen-potassium compound fertilizer) as top dressing; or 15-10-20 (N-P2O5-K2O) ) or similar formula for top dressing. (2) The production level is more than 3000 kg/mu: the recommended dosage of formula fertilizer (base fertilizer) is 60 kg/mu; the seedling stage to the tuber expansion period is to apply urea 10~15 kg/mu, potassium sulfate 10~15 kg/mu, Or topdressing formula fertilizer (dressing fertilizer formula 15-10-20) 20~25 kg/mu. (3) The production level is 2000~3000 kg/mu: the recommended dosage of formula fertilizer (base fertilizer) is 50 kg/mu; the seedling stage to the tuber expansion period is 5~10 kg/mu, and the potassium sulfate is 8~12 kg/mu. Or topdressing formula fertilizer (dressing fertilizer formula 15-10-20) 15~20 kg/mu. (4) The production level is 1500~2000 kg/mu: the recommended dosage of formula fertilizer (base fertilizer) is 40 kg/mu; the seedling stage to the tuber expansion period is 5~10 kg/mu, and the potassium sulfate is 5~10 kg/mu. Or topdressing formula fertilizer (dressing fertilizer formula 15-10-20) 10~15 kg/mu. (5) The production level is below 1500 kg/mu: the recommended dosage of formula fertilizer (base fertilizer) is recommended to be 40 kg/mu; the seedling stage to the tuber expansion period is to apply urea 3~5 kg/mu, potassium sulfate 4~5 kg/ Mu, or topdressing formula fertilizer (dressing fertilizer formula 15-10-20) 10 kg / mu. (6) Apply 2~3 square organic fertilizer per mu as base fertilizer; if organic fertilizer is applied to the base fertilizer, reduce the amount of chemical fertilizer as appropriate. (7) For soils deficient in boron or zinc, 1 kg/mu of borax or 1~2 kg/mu of zinc sulfate may be applied. This article URL: Spring Fertilization Guidance for Major Crops in Spring 2018 (Potato Part) Galacto-Oligosaccharide Powder Food Grade Galacto Oligosaccharides,GOS Galacto-Oligosaccharides Powder,Organic Galacto-Oligosaccharide Powder Qingdao Bailong Huichuang Bio-tech Co., Ltd. , https://www.sdblcycn.com
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