Three golden time points for grape calcium supplementation

[ Agricultural Products Network] Calcium is mainly absorbed into the grape plant from the xylem through the roots under the action of transpiration. The transpiration of the leaves is about 30 times that of the fruit. Most of the calcium flows into the leaves, so that the fruits are directly absorbed from the soil. There is very little calcium, and in fact only 2% of the calcium absorbed by the roots can be transmitted to the fruit. Therefore, in particular acidification of vineyards, soil exchangeable calcium content of the lack of serious, widespread grape fruit calcium deficiency, calcium shortage of high-yield elements of these vineyards.

Grape calcium supplementation 3 stages:

1. The grape absorbs 40% of the whole year from the germination to the fruit setting period. The roots of the calcium foot grape are developed, the new shoots are neat and tidy, and the flowering fruit is good.

2. The grape absorbs 30% of the whole year from the fruit setting period to the hard core stage. The calcium foot skin is well developed, hardened and cracked; the leaves are thick, the root system is developed, the growth is strong, and the disease resistance is strong.

3, the grape from the hard core period to the coloring period to absorb 30% of the whole year of calcium, calcium foot fruit weight gain and yield; fruit peel thickened and less fruit; fruit handle thickening does not drop the grain; leaf health is not premature aging.

Grape calcium supplementation should be combined with leaf spray to effectively solve various physiological diseases caused by calcium deficiency in grapes. The specific methods are as follows:

1. Soil topdressing:

Fist, adjust the pH, grape ZUI suitable pH to 6.0 and 7.5, Adding organic fertilizer to improve soil organic matter content, increase the activity of the existing soil calcium, and calcium reduce the chance of new facilities to be fixed (high phosphorus fertilizer must not and calcium fertilizer used together, in order to avoid precipitation of calcium phosphate and is fixed), the young fruit of grapes, enlargement of calcium and sugar alcohol applied to maturity, to prevent cracking and other physiological harm caused by calcium deficiency grapes.

2, foliar spray:

For plots that are prone to calcium deficiency, foliar sprays should be applied before and after flowering. When spraying, choose windless or windless weather, spray finely onto the back of the leaves, and focus on spraying inflorescences, ears, and young tissues. Spraying once before flowering, the fruit is sprayed with calcium after 1 to 2 weeks.

Three golden time points for grape calcium supplementation