Generally speaking, the grapes need to apply the following seven times of fertilizer every year, and after each fertilization, water is poured once to ensure the high yield of the grapes.
1, germination fertilizer. Applying nitrogen fertilizer as the main germination fertilizer can make the grapes germinated neatly, the leaves are thick, and the inflorescences are large and strong. If the tree is too strong and the spring is not very dry, the fertilizer can be saved, so as not to cause new shoots.
2, before the flower fertilizer. Before the germination of the grapes, the nutrients stored in the trees are mainly consumed. If the supply of nitrogen fertilizer is insufficient at this time, a large number of fallen flowers will fall, which will affect the vegetative growth. This time, it is advisable to apply manure and manure with ammonium nitrate or urea, and the amount of fertilizer accounts for 10% to 15% of the annual fertilizer.
3, after the flower fertilizer. After flowering, young fruit and new ones grow rapidly and require a lot of nitrogen nutrition. Fertilization can promote new normal growth, enlarge leaf area, improve photosynthesis efficiency, facilitate the formation of sugar and protein, and reduce physiological fruit drop.
4, bulk fat. After the fruit is placed in the grape, the fruit is like a green bean, and it is applied as late as the soybean. The fertilizer is mainly nitrogen, and phosphorus and potassium fertilizers are applied. It can be applied with high-nitrogen compound fertilizer, or can apply ordinary three-element compound fertilizer, and add nitrogen fertilizer such as urea as appropriate. The amount of fertilizer is large, accounting for about 50% of the amount of fertilizer applied throughout the year.
5, ripening fertilizer. It is divided into two. 20-30 days before maturity, high-potassium water-soluble fertilizer is applied, and the grape berry starts to be soft, and the fertilizer is applied once again when it is not colored. After many fruit farmers have applied large fertilizers, they will no longer apply ripening fertilizers, or cause fruit color change or lack of fertilizer. Grapes are poorly resistant, easy to get sick, and have high yields without harvest. Or poorly colored, sugar is not high, can not sell good prices and so on. It can be directly applied to functional fertilizers, and a large amount of elemental water-soluble fertilizers are converted to color. High-phosphorus and high-potassium types are recommended, and trace elements such as boron and zinc are contained.
6, "moon child fat." After harvesting the grapes, apply 1 time of fertilizer, usually apply 15 kg of water-soluble fertilizer. The effect of this fertilizer is not only used to restore the tree potential, but also promote flower bud differentiation, laying a foundation for the high yield of the next year.
7, winter fertilizer. The traditional method is applied during the grape dormancy period. In recent years, it is recommended to apply in August and September. After harvesting grapes, it is also applied during the growth of green leaves. At this time, it is the second highest peak of grape root growth, which can promote the grape to produce a large number of fibrous roots, so as to strengthen the tree, which is more conducive to wintering. The fertilizer is mainly organic fertilizer. If farmyard manure is applied, it must be decomposed and fertilized at the same time.
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