How to fertilize yam planting?

How to fertilize Chinese yam? Please introduce the main long branches and leaves of Chinese yam in seedling stage and vine-shaking stage, and the fertilizer is mainly nitrogen. After budding, the underground tuber begins to expand and requires a large amount of fertilizer, which is the key period of fertilization, and it is necessary to apply nitrogen, phosphorus and potassium together. First, base fertilizer. Select a good field, before ploughing, apply mature farm manure 2000 kg-4000 kg, compound fertilizer 60 kg-80 kg as base fertilizer, and then plough the soil 30 cm and rake it to pieces. Second, topdressing. Nitrogen fertilizer was the main fertilizer at seedling stage, and 10 kg-15 kg high nitrogen and potassium compound fertilizer was applied per mu. In early July, 20 kg-25 kg of high nitrogen and potassium compound fertilizer was applied per mu, and 0.25% potassium dihydrogen phosphate was sprayed once. Starting from late July, 0.25% potassium dihydrogen phosphate can be sprayed 2-3 times, and 20 kg-30 kg of nitrogen, phosphorus and potassium compound fertilizer per mu in the first ten days of August. Tuber filling period generally does not take soil topdressing, can be sprayed with 0.25% potassium dihydrogen phosphate once to prolong the vine growth time. Click to get more yam planting techniques click to get more vegetable planting techniques