The cultivation of grapes needs to master certain techniques. What should be paid attention to in the management of grape fertilizer?
First, high temperature, lack of nutrient, fertility, fruit application, rapid application of phosphorus, potash fertilizer can improve the quality of the fruit, but also enhance the ability of the tree disease resistance. However, this climate is generally dry, high temperature, soil moisture is not good. If irrigation is not timely after fertilization Due to the lack of soil moisture, the roots absorb large concentrations of fertilizers, and it is prone to produce coking after fertilization. This shows salt symptoms, impairs the function of leaves, affects photosynthesis, and then affects fruit quality. At the same time, the disease resistance of leaves is reduced.
Second, the deep application and shallow application with the grape fertilizer According to the different types of fertilizers, can be applied deep or shallow way. Chemical fertilizer has a fast decomposition, easy absorption, but also has the characteristics of volatile. Growth period in the grape from the The main vine spreads in the range of 0.8-1m and then covers the soil.
Third, irrigation before flowering should not be combined with fertilization before flowering is an effective measure to increase the rate of fruit set in grapes. The amount of irrigation should be appropriate. Even if the drought before flowering, the temperature is higher, but the soil temperature is relatively low, after the irrigation, the inhibition of soil temperature rise Affect root activity, reduce the absorption of roots to fertilizer, so the amount of irrigation should not be too large at this time. So the leaf growth and development at this time is accelerated, the need for trace element iron is more, irrigation water makes the soil temperature is too low, iron absorption is blocked, easy Yellow leaves appear, showing iron deficiency symptoms. At the same time, too much irrigation, resulting in increased humidity in the field.
Fourth, fertilizer selection should be suitable for flowering Fertilization should be dominated by phosphate fertilizer, with boron, zinc, iron and other trace elements, when the length of the new shoots is appropriate, when the leaves are hypertrophic and green, there should be less or no nitrogen fertilizer. Into the amount of nitrogen, phosphorus and potassium ternary compound fertilizer, promote the early restoration of fruit tree function to prevent premature aging. Grapes are more potassium fruit trees, potassium sulfate is better when using potassium fertilizer.
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