What fertilizer should be used to grow yam? What fertilizer is best for growing yam?

1. Base fertilizer

When planting yam, you must apply base fertilizer. Because its growth cycle is relatively long, it requires a lot of fertilizer. Usually, organic fertilizer or decomposed farm manure is the main fertilizer. This type of fertilizer can release fertility slowly and persistently, thus providing nutrition for its entire growth period. Generally, 2000-4000 kg of farmyard manure is used per mu, together with 60-80 kg of compound fertilizer. If you use organic fertilizer, you need to apply about 2,000 kg, combined with 20-30 kg of urea and 40-50 kg of phosphorus and potassium fertilizers.

2. Topdressing

1. Before germination: After sowing yam, manure fertilizer needs to be applied once before germination. The fertilizer must be fully decomposed, otherwise it will burn the seedlings once fermented. This fertilizer not only provides nutrients for plant growth, but more importantly, it can increase ground temperature and accelerate seed germination.

2. After transplanting: Generally, fertilizer needs to be applied once after the seedlings are grown or transplanted. Fertilizer can continue to be manure or nitrogen fertilizer. As an early stage of fertilization, the main purpose at this time is to accelerate the growth of the plant's stems and leaves, so it is necessary to ensure that there is sufficient nitrogen. However, the concentration must also be controlled. If there is too much nitrogen fertilizer, it will cause the plant to grow too tall.

3. Bud stage: After the yam buds appear, fertilizer needs to be added. At this time, it has a high demand for fertilizer, and you must apply enough fertilizer to make its flowers bloom. Cake fertilizer or compound fertilizer is usually used, which can provide more comprehensive nutrients. 25 kg per mu is enough.