Fertilizer with reasonable
Before flowering, in the young fruit period, during the expansion period, the grape shuangtingling is sprayed in time to match the nutrition, so that the grape pedicle (fruit handle position) becomes thick, and the transport channel is opened, so that the nutrients and moisture of the fruit tree mother can be saturated to supply the pulp. Developmental expansion needs.
Phosphate fertilizers should be used for flowering at flowering stage, with trace elements such as boron, zinc and iron. When the length of new shoots is appropriate, when the leaves are hypertrophied and green, less or no nitrogen fertilizer should be used. On the contrary, appropriate amount of nitrogen fertilizer should be used. Phosphorus and Potassium fertilizers are the main coloring period. Appropriate amount of nitrogen, phosphorus and potassium ternary compound fertilizer is applied after fruit is harvested to promote early restoration of fruit tree function and avoid premature aging. Grapes are fruit trees with more potassium, potassium sulfate is better when potassium fertilizer is used. Practice has confirmed that the result of potassium chloride application is thick skin with astringent tingling aftertaste, and potassium chloride should be applied as little or as little as possible.
Irrigation must be adequate
It is an effective measure to increase the rate of fruit set of grapes by applying proper irrigation before flowering, but the amount of irrigation should be appropriate and appropriate. Irrigation before flowering will inhibit the increase of soil temperature, affect root activity, and reduce the absorption of roots to fertilizer. Therefore, the soil is not very dry at this time, and irrigation is generally not required. When the soil is dry, the amount of irrigation should not be too large. During this period, the growth and development of leaves accelerated, and the need for trace element iron was more. Irrigation reduced soil temperature, iron absorption was hindered, and yellow leaves appeared easily, showing iron deficiency symptoms. At the same time, too much irrigation, resulting in increased humidity in the field, easily lead to disease. If it is indeed due to high temperatures, soil water shortage, severe drought when irrigation, it is best to take the inter-water approach, the amount of irrigation should not flood irrigation, to prevent excessive humidity in the garden and increase the probability of disease infestation.
Deep and shallow cooperation
According to the different types of fertilizers, fertilizers can be applied in deep or shallow forms. Chemical fertilizers have fast decomposition, easy absorption, and are also volatile. The growth period is within 0.8 to 1 meter from the main vine of grapes. Ditch cast, after the cover soil. The farmyard manure is carried out during the dormancy period of winter trees, combined with turning gardens to spread the fertilizer and topsoil together, changing the manure in the ditch, the concentration is large, the decomposition is slow, the root stretches and hits the wall, sometimes it is easy to cause the defects of burning roots, and the spreading can also be improved. The deepening of topsoil makes the soil fluffy, reduces compaction and improves the drought resistance of the plant.
High-temperature fertilization requires irrigation
Application of quick-acting phosphorus and potash fertilizers in the early fruit ripening stage can both improve fruit quality and strengthen the disease resistance of the tree. However, the climate is usually monotonous, the temperature is high, the soil moisture is not good, and if irrigation is not timely after fertilization, soil moisture is insufficient, and the root system The concentration of absorbed fertilizer is large, and the fronding of the leaf margin is easy to emerge after fertilization, which shows the symptoms of salt damage, impairs the function of leaves, affects photosynthesis, and then affects the quality of the fruit, and the disease resistance of the leaf decreases.
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