In recent years, as the price of grapes has risen step by step and the planting efficiency has increased steadily, the enthusiasm of farmers to grow grapes has gradually increased, and the investment in grape cultivation has also increased. The following are some unscientific methods in fertilization. Fruit farmers may wish to check to see if these problems exist.
First, the newly planted vines are fertilized early, causing the dead seedlings to be newly planted with vines. Generally, when the tendrils grow, only new roots grow. Excessive fertilizer is applied before the new root grows. On the one hand, the seedlings are difficult to absorb water, on the other hand, it is difficult for new roots to grow. In the case of high temperature weather, the ground part is dry and dead. Before the new root grows, it is only suitable for foliar supplement nutrition. It can be sprayed with urea water 500 times liquid + Nonglaixin potassium dihydrogen phosphate 600 times liquid leaf spray, sprayed once every 5 days, even sprayed 3 times.
Second, after germination, the leaves are yellowed and fertilized and watered. From germination to flowering, 65% of the nutrients come from the storage of the tree in the previous year. At this time, the tree shows yellowing, mainly the tree nutrient accumulation in the previous year. Insufficient, basically related to the root system is weak and weak. In this case, on the one hand, it is necessary to loosen the soil, improve the ground temperature, and at the same time, to supplement the nutrition of the foliage, you can refer to the above-mentioned foliar fertilization scheme.
Third, the treetop yellowing or whole tree yellowing will blindly iron some vineyards, the treetop leaves are yellow, and even the whole tree leaves are yellowish in color. The symptoms are very similar to iron deficiency, not necessarily the lack of iron in the soil. Mostly, the soil is cold and wet, the roots are poorly breathed, and the absorption capacity is weak, which is caused by difficulty in absorbing iron and other elements. The first thing to solve in this situation is the problem of soil permeability and root respiration vitality. Loosing and dehumidification are effective measures, physiological diseases are reduced, and production is going up.
Fourth, the more the fertilization, the higher the yield. Many grape growers believe that the more fertilized the grapes, the better the yield and the higher the yield. This is not the case. Vineyards that use high-concentration fertilizers have lower yields and worse quality than those with medium and low-concentration fertilizers. When the tree is too close to the fertilization, not only the absorption and utilization rate is low, but also the coarse root system is easily burned, which has a great impact on the growth of the tree. If a large number of roots die in the previous year, the germs spread along the roots of death, which will cause the branches in the next year to suddenly die.
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