Tips for grape fertilizer use.

1. Management of sweetening.

By controlling the yield, it can effectively increase the sugar level.

In the spring, the new shoots germinated, first of all the buds and branches, generally a fruiting branch leaves a second year new shoots.When the grapes are in bloom, they should be picked: 11-12 leaves;Deputy tip for 6 to 7 second pick heart leaf, second deputy long tail up, leave 1-2 leaf for the third time to pick a heart, after three times to pick a heart, fruit about 20 leaf, satisfy the fruit growth, and makes big grape sweetness.

Fertilization and sweetening.

The long-term application of fast effect phosphate fertilizer or potash fertilizer can promote the increase of sugar content in fruit.Through experimental study, the effect was most obvious with the addition of the phosphate fertilizer, the second of potash fertilizer, and the long-term application of nitrogenous fertilizer to reduce the sugar content of the fruit.

The compound use of NPK fertilizer can reduce the sugar content of the fruit.Adding organic fertilizer at the same time with the application of phosphate fertilizer will increase the sweet effect of potash fertilizer.Therefore, it is important to increase the application of phosphate fertilizer in the fruit growing period.It is better to add the organic fertilizer while applying the phosphate fertilizer and improve the effect.

It can increase the sweetness of grapes by spraying 800 to 1000 times of the fruit of the grape fruit, or 4%~6%.

Other sweeteners.

The rare earth solution of 0.05%~0.1% during the soft period of grape berry is required to be prepared in water with a pH of less than 7, and the pH will be adjusted to about 5 with nitric acid, hydrochloric acid or vinegar.

In the soft period of grape fruit, the spray is used to mediate the hormones such as phosphorus and cobolin, increase the sweetness of the grape and increase the color.

In the fruiting stage of the grape, apply sweet liquid to the leaf surface of the grape.Formula: 30 grams of borax, 1000 grams of sucrose, 5 grams of calcium chloride, 50kg of water, dissolved.Spray 25 to 30kg per acre.

It is necessary to strengthen the management of water and fertilizer, and it can not be used in combination with other chemicals such as pesticides.