How to Fertilize Chinese Yam? A Detailed Guide to Scientific Fertilization Methods
During the seedling stage and the vine-spreading stage, Chinese yam mainly grows leaves and branches, so fertilizers should be mainly nitrogen-based. After budding, it enters the peak growth stage, the underground tubers begin to expand, and the fertilizer demand is relatively large. This is the key period for fertilization, and nitrogen, phosphorus, and potassium should be applied in combination. I. Base fertilizer. Choose a good field, and before plowing, apply 2000 kg-4000 kg of decomposed farmyard manure and 60 kg-80 kg of compound fertilizer per mu as base fertilizer, then plow the soil 30 cm deep and harrow it fine.
During the seedling stage and the vine-spreading stage, Chinese yam mainly grows leaves and branches, so fertilizers should be mainly nitrogen-based. After budding, it enters the peak growth stage, the underground tubers begin to expand, and the fertilizer demand is relatively large. This is the key period for fertilization, and nitrogen, phosphorus, and potassium should be applied in combination.
I. Base fertilizer. Choose a good field, and before plowing, apply 2000 kg-4000 kg of decomposed farmyard manure and 60 kg-80 kg of compound fertilizer per mu as base fertilizer, then plow the soil 30 cm deep and harrow it fine.
II. Topdressing. During the seedling stage, mainly use nitrogen fertilizer, applying 10 kg-15 kg of high-nitrogen high-potassium compound fertilizer per mu. In early July, apply 20 kg-25 kg of high-nitrogen high-potassium compound fertilizer per mu, and spray 0.25% potassium dihydrogen phosphate once. Starting in late July, spray 0.25% potassium dihydrogen phosphate 2-3 times. In early August, apply 20 kg-30 kg of nitrogen-phosphorus-potassium compound fertilizer per mu. During the tuber-filling stage, soil topdressing is generally not used; instead, spray 0.25% potassium dihydrogen phosphate once to extend the vine growth period.