1, fertilizer management out of control of the application of nitrogen fertilizer bias water supply bias

2, plant load light not up to the corresponding yield branches in vain

3, pruning reasonable tree strength and weakness

4, single application of fertilizer ignoring the use of organic fertilizers

5, the flowering of pinching and breaking the trailing period of the early leaves to stay less

6, the pre-flowering of a reasonable amount of fertilizer

7, the flowering of the rack surface of the dense branches to cause ventilation on the rack surface

7, the flowering of the rack surface of the water supply. p>

6, a reasonable amount of pre-flowering fertilizer

7, the amount of dense branches during the flowering period caused by the ventilation of the shelf surface during the flowering period to produce good ventilation and light during the flowering period to produce a low rate of sitting in the flower failure spikes loose and scattered

8, the plant's single and double trailing too short shelf surface is too low all lead to strong growth of plants, especially grafted seedlings are more pronounced

Two, to control the phenomenon of large and small grains of measures:

1, water: the ground surface of 10 cm down to be able to hold the soil can be used for the purpose of the flowering. 10 cm of soil under the hand can be held into a ball suitable general pre-flowering 2 times water that low-lying or sticky soil 1 time water or irrigation

2, control fertilizer: pre-flowering nitrogen fertilizer less to give or to give organic fertilizer to sit on the grains of long soybean grains big when you need to be large fertilizer and water hard core period to the coloring period to be more application of phosphorus and potassium fertilizer

3, the reasonable adjustment of the plant load: 4 years of age on the vines are about 10 kilograms of suitable flowering branching foot 20 cm long to stay More than 20 cm on the thickness of 1 cm to stay double spikes, especially the stand corner and the tip of the strong branches to stay double spikes or double single spikes pressure branch

4, reasonable pruning: knot branch distance of 25 centimeters from the strong branches (refers to the 1.2 cm thick on the branch) to be thinned out the knot branch distance of more than 20 centimeters on the buds should be taken to take multiple buds pruning to supplement the empty space in the following year's spring to wipe the buds to set the branch should be left on the two ends of the go to the middle of the branch to grasp the branch spacing between the branch spacing of 25 cm or so to stay 3 buds cut the following spring to wipe the buds set branching to erase the top buds to stay 1 to 2 buds knotting strong branch to stay double spikes knotting branch distance of 15 to 20 cm long to stay the base of the bud knotting the rest of the erase to maintain the momentum of the tree mediocrity

5, pinch break trailing: pinch break trailing time to be too early before the flower of 3 to 5 days before the appropriate double-bud knotting branching groups pinch tip to stay a long and short branches of 6 to 8 leaves long branches (strong branch) 8 to 10 leaves should be spikes of length of 10 cm under the pinch or less pinch 20 cm or so pinching Go 1/5

6, cut off the surface roots: 4 years old on the size of the grains have been produced on the giant grapevines need to cut off the surface roots of its method: fall before the shelf surface roots with a shovel to cut off the roots of the root from the base of the plant can be more than 10 centimeters, otherwise up to the effect of the root cut off in the spring, growth is slightly slow yellowing of the leaves to sit need to strengthen the fertilizer management to quickly restore the tree

7, twisting: 3 to 4 days before the flowering of the strong knotting spikes too The upper part of the twisting branch bending or twisting flat that

8, the use of two branch knot: grape grains nearly soybean grain size when it is already obvious to see the phenomenon of large and small grains 5 to 6 leaves at the cut off the upper branches and leaves to use the two branch knot time before June 20 to carry out the desirable with a high rate of sitting spikes neat ripening 7 to 10 days later

9, the use of expanding agent: the giant peak grapes is already obvious to see the size of the grains when (flower 15 days or so) For dip spike 1 time (or uniform spray) grains have elasticity to the coloring period found that the phenomenon of cracking should be timely water control or rain drainage

10, the use of new tree promoter and control agent-PBO: with the promotion of grape grains, color, early maturity, anti-cracking, yield characteristics of the dosage should be determined according to the tree 1 to 2 days before the flower of the first soil applied to the peak tree suitable for watering 5 to 7 grams per plant; strong trees per plant to apply 2.5 ~ 3 grams per mu trellis dosage of about 250 grams per mu hedgerow 250 ~ 500 grams the second time in about 25 days after the flower spray liquid concentration of 100 ~ 250 times the practice has proved that the use of peak trees of Jumbo Peak PBO sat significantly increased the need for nitrogen fertilizer should be poured in early April 100 ~ 150 grams of urea per plant germination combined with spraying to join the urea in the first half of June Potassium fertilizer main foliar fertilizers can be intermittent harvesting and immediately chased the 2 times the production of fertilizer and flooding 9 The end of the month to the beginning of October to apply 3000 kilograms of farmyard manure and irrigation 2 times