How to Make Grapes Sprout Better

As the temperature rises gradually, the grapes will end their dormant period and start a new year of growth and development. The earlier grapes have begun to germinate, and the grapes often have irregular germination, slow seedling raising, and self-capping during the germination period, which will affect the normal growth of the grapes. Development, such as less fruit hanging, slow fruit expansion and coloring, increased sun fruit cracking, poor differentiation of flower buds, etc., affect yield and quality.

Reasons for uneven budding of grapes

1 Insufficient cooling capacity

From pruning to germination, grapes generally need to go through dormancy at a temperature below 7.2°C for about 1,000 hours before they can germinate and grow normally. However, in the southern region or in early cultivation, irregular germination and growth disorders often occur due to insufficient cooling capacity (insufficient dormancy time).

2 Insufficient nutrient reserves

80% of the nutrients in the grape germination period are accumulated in the tree body in the previous year, and it is often due to improper management in the autumn and winter of last year, such as: the fruit fertilizer was not applied in time after the fruit was picked, and the tree vigor was not effectively restored; the pest control was not in place after the fruit was picked. Premature senescence or even early fall of leaves; not using or applying unreasonable overwintering fertilizers in autumn and winter; resulting in insufficient tree nutrients when budding in spring, resulting in weak tree vigor or irregular budding.

3 Root activity is weak

Most orchards do not pay attention to soil maintenance. When fertilizing, they mainly use chemical fertilizers and neglect the application of organic fertilizers, resulting in soil salinization, compaction, poor air permeability, and affecting root vitality. In addition, the ground temperature rises slower than the temperature rise in spring, which easily leads to weak root activity. , affect nutrient absorption, and are not conducive to the growth of trees such as germination and leaf expansion.

Grape germination is late and irregular, which brings a lot of inconvenience to field operations such as bud removal, topping and subsequent flower and fruit management, and hinders the production of high-quality grapes.

It is very important to solve the phenomenon of irregular grape germination.

1 Timely pruning

The branches that have been drained are retracted in time, and the branches and vines that are weak before budding and strong after budding are retracted to the position of good buds and branches, mainly to restore the tree vigor and predict the results.

2 Timely irrigation and top dressing

After the ground temperature rises, it is necessary to irrigate in time to ensure sufficient water supply for the branches and tendrils. After watering, the soil should be loosened in time to preserve moisture. Nitrogen fertilizer is the main topdressing fertilizer in the early stage, and more phosphorus and potassium fertilizers are applied in the later stage. It is advisable to fertilize an average of 5 times in mature orchards.

3 Promote new roots

The vitality of the root system is limited during the germination period, and it is still necessary to do a good job in antifreeze and antifreeze work through nutritional means, and at the same time, it is also necessary to promote capillary roots and improve the fertilizer absorption capacity of the root system.