Fertilization technology of chestnut orchard
Chestnut orchards are fertilized three times a year. The first fertilization in the spring before and after germination, mainly based on the application of quick-acting fertilizers (such as nitrogen fertilizer, urea and other fertilizers and fermented various farmyard manure), it plays an important role in promoting the development of new shoots and vegetative growth of trees. The second fertilization is mainly applied to nitrogen, phosphorus and potassium fertilizers (such as potassium dihydrogen phosphate, superphosphate, etc.) and a small amount of trace elements such as boron, manganese, zinc and magnesium during the fruit expansion period (about 7 months). It has obvious effects on increasing the number of female flowers, reducing empty space, maintaining fruit and fruit, increasing fruit weight and improving the quality of chestnut fruit. The third fertilization is carried out in the late autumn, that is, after fruit picking, combined with autumn turn, mainly based on the application of base fertilizer, such as decomposed pig cow dung, chicken manure, human waste, cake fertilizer, manure, bone powder and so on. It has a greater role in promoting the differentiation of flower buds and enhancing their ability to resist cold. The specific fertilization amount of each tree should be determined according to factors such as tree potential, yield and site conditions. In general, each adult tree of the adult fruit is to be fertilized with 50-75 kg of base fertilizer such as pig manure, 1 to 2 kg of urea, 1 kg of superphosphate, and a small amount of trace elements. The first, second and third fertilization amounts accounted for 20%, 30% and 45% of the total fertilization amount for the whole year.
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