Germination accelerating fertilizer Generally, it is applied before the grapes germinate. This time, nitrogen fertilizer (suitable for water soluble fertilizer) is mainly used to promote the orderly germination, thick leaves and large and strong inflorescences. If the tree is too strong and the spring is not too dry, the fertilizer and water can be omitted this time, so as not to cause the new shoots to grow in vain.

Swelling and fattening. After the grapes set fruit, that is, when the fruit grains are as big as mung beans and as big as soybeans, apply them. The fertilizer is mainly nitrogen fertilizer, and phosphorus and potassium fertilizer are also applied. High-nitrogen compound fertilizer or common three-element compound fertilizer can be applied, and nitrogen fertilizer such as urea can be added as appropriate. This time, the amount of fertilizer is large, which can account for about 50% of the amount of chemical fertilizer applied in the whole year.

Ripening fertilizer? It is divided into two stages. The first stage is applied 20-30 days before ripening, mainly with high-potassium water-soluble fertilizer, and the second stage is applied when the grape berries begin to soften and are not colored. Many fruit farmers do not apply ripening fertilizer after applying swelling fertilizer, resulting in fruit color change (commonly known as pot disease) or poor grape resistance due to lack of fertilizer, which is easy to get sick and high yield but not good harvest. Or poor coloring, low sugar content, can not sell at a good price. This fertilization is very important. It can be functional fertilizer or water soluble fertilizer. It is recommended to be high in phosphorus and potassium, and contains trace elements of boron and zinc.

"the moon is fat." Refers to the primary fertilizer applied after grape harvest, usually water soluble fertilizer (high nitrogen type)15kg. The function of this fertilization is not only to restore tree vigor, but also to promote flower bud differentiation, laying a foundation for high yield in the next year.

Overwintering fertilizer The traditional method is to apply grapes during dormancy. In recent years, it is advocated to apply grapes in August and September, and it is still applied during the growth of green branches and leaves after harvesting. At this time, it is the second peak of grape root growth, and fertilization can promote grape to produce a large number of fibrous roots, which will strengthen the tree and be more conducive to wintering. This time, the fertilizer is organic fertilizer (if farmyard manure is applied, please be careful that it must be decomposed! ) is given priority to, at the same time apply calcium fertilizer, or add a small amount of three elements.