2, and the application of potash fertilizer to improve fruit quality has a better effect. Yangmei planting to hillside mainly, the soil nitrogen, phosphorus, potassium content is low, and topsoil easy to lose nitrogen, phosphorus, potassium fertilizer, the actual amount of fertilizer than the theoretical value is slightly larger. In addition, should also take into account the tree nutrient levels, tree growth potential is strong, nutrient accumulation is also more, and vice versa, weak growth potential, nutrient accumulation is also less.
3, fertilization time. Yangmei tree due to the growth of spring and summer tree tops and flowering and fruiting, consumed a lot of nutrients, July-August is the flower bud differentiation and autumn growth period, the growth of autumn directly affects the yield of the second year. Therefore, after the picking of fertilizer is the most important part, fertilizer time is generally 15-20 days after the picking of prunes is good.