The Key Techniques of Fertilizing and Irrigation Before Red Grape
According to the growth and development rules and botany characteristics of red grape, in order to ensure its good flowering and insemination, to meet the flowering needs, combined with the status of natural soil supply and output of local soil, the specific operations for ensuring sufficient water and fertilizer before flowering are as follows:
1, fertilization irrigation time: the middle and late Qingming Festival, the Gregorian calendar April 15-20.
2. Irrigation volume: 15-20 m/m.
3, fertilization principle: the ratio of nitrogen, phosphorus and potassium is 1:2:1.
4, fertilization method:
(1) For vineyards without droppers, 50-70 kg of compound fertilizer can be applied per acre. At the same time, foliar spraying with high concentrations of boron fertilizer 2 times;
(2) For vineyards equipped with droppers, a high-grade imported water-soluble compound fertilizer of 5-6 kg can be applied per mus. At the same time, foliar spraying of high-concentration boron fertilizer was performed twice.
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