Yam must be planted with good base fertilizer, because its growth cycle is relatively long, so the demand for fertilizer is also very large, usually organic fertilizer or decomposed farmyard manure, this kind of fertilizer can slowly and persistently release fertility, so as to provide nutrition for its entire growth period.Generally, 2000-4000 kg of farmyard manure is used per mu, and 60-80 kg of compound fertilizer is used at the same time.If you use organic fertilizer, you need to apply about 2000 kg, with 20-30 kg of urea, and 40-50 kg of phosphorus and potassium fertilizer.
1, before emergence: aft that yam is sown, manure needs to be apply once before emergence.Fertilizer should be fully decomposed, otherwise it will burn seedlings once fermented.This fertilizer can not only provide nutrients for plant growth, but also improve ground temperature and accelerate seed emergence.
2. After transplanting: Generally, fertilizer needs to be applied once when the seedlings are all planted or after transplanting. The fertilizer can continue to use manure or nitrogen fertilizer.As early fertilization, at this time is mainly to accelerate the growth of plant stems and leaves, so to ensure adequate nitrogen.However, we should also control the concentration, if too much nitrogen fertilizer, it will also make it grow.
3. Bud stage: When the yam bud appears, it needs to be supplemented with fertilizer. At this time, it has a high demand for fertilizer. It must be fully fertilized to make its flowers open.Usually choose cake fertilizer or compound fertilizer, which can improve more comprehensive nutrients, as long as 25 kg per mu is enough.
