The absorption of calcium by grape roots is mainly concentrated in the flowering period to the color change period. Before the leaves are deciduous, the calcium content in the leaves increases, and 54% of the calcium in the plants is lost with the leaves. How to give calcium to the grapes, reminding the majority of fruit farmers to start from four aspects: 1. Add organic fertilizer. It is better to use organic fertilizer in autumn, and it should be sooner rather than later. The amount of fertilizer applied should be determined according to the yield per plant of fruit trees. It is more suitable to apply 100-150 kg of organic fertilizer per 100 kg of grapes. 2. Soil calcium supplementation. Combine the organic fertilizer of autumn application with 1~2 kg of calcium nitrate per vine. Control the amount of potassium fertilizer applied, adjust the potassium/calcium ratio of the vine, so that the potassium/calcium ratio is 1.2 to 1.5/1. In addition, the right amount of boron can promote the transport of carbohydrates to the roots, promote new roots, and facilitate the absorption of calcium. In combination with the application of organic fertilizer, a small amount of boron fertilizer, such as borax 0.1 to 0.15 kg, is added. The application of medium trace elements such as calcium magnesium boron zinc iron. 3. Foliar spray of calcium. For orchards with severe calcium deficiency, the fruit growers can spray calcium fertilizer, such as calcium nitrate, in the early stage of grape growth, early fruit expansion and 1 month before harvest, and the concentration is less than 0.5%. Calcium is poorly mobile in the grape, so a small amount of spray The effect is better. The calcium preparations with better effect are available calcium, amino acid calcium, calcium magnesium and the like. 4. Amino acid calcium solution soaked fruit. Before harvesting, the fruit is diluted with 300-400 times amino acid calcium solution to prevent calcium deficiency during storage. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Office Safe Box,Commercial Safe Box,Heavy Biometric Office Safe Box,Large Office Safe Box Hebei Yingbo Safe Boxes Co.,Ltd , https://www.yingbosafebox.com