Key Technologies for Grape Spring Management
Spring is the season when the grapes sprout, and the elongation, heading, and flowering of the branches and branches are increased. The strengthening of grape management in spring will increase the yield and quality of grapes.
From mid-to late March to early March, germinating water is used to initiate germination, and nitrogen fertilizer can be applied quickly. The conditional orchards at this stage should be filled with water in a timely manner to ensure budding and orderliness. At this time, it is the flower buds that continue to differentiate and the new shoots begin to thrive. When large amounts of nutrients are needed, the human feces and urine is blended with 0.2% urea. The amount of fertilizer applied is about 15% of the whole year.
From March to mid-April, set the shoots, wipe buds, spikes and disease control. After winter refurbishment, the winter buds on the mother twigs usually have 70% to 80% germination, and care should be taken to keep the buds. Leave too many buds, easy to waste nutrients, weak tree vigor, is not conducive to fruit set; but if too little to stay buds, easy to promote strong growth of branches and branches of severe easy to drop flowers, so pay attention to wipe shoots shoot.
Trimming buds: Usually when one bud of multiple buds germinates, one bud is left every 15 to 20 centimeters, leaving 2 to 5 new shoots for each result, and the rest are wiped from the base. When the buds are wiped off, the apical buds or weak buds in the two buds are generally wiped out, and only one shoot is left in one bud. In order to ensure the yield, it is also possible to determine whether to leave the first coil when the new shoot grows to 4 to 5 leaves, but this wastes more nutrients.
Pin tip binding vines: The preserved shoots leave 5 leaves above the flower spikes before flowering, and 8 leaves leave no flowers. After topping, a large number of axillary shoots were sprouted, leaving only 1 to 2 apical shoots on the top and leaving 2 leaves repeatedly topping. The rest of the auxiliary shoots were all erased. At the same time according to the growth of vines tied vines.
Spike processing: In order to ensure the fruit setting rate, one-fifth of the panicle spike is usually removed manually and 0.3% boron plus 0.5% urea is applied during the flowering period. Five days after flowering, artificial fruit thinning was performed on fruit trees with more fruits and then bagged.
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