Views:680 Author:VV Publish Time: 2016-07-28 Origin:Rech Chemical Co. LTD
After grape field planting, the management of water and fertilization become the important thing. Magnesium sulfate and other fertilizers fertilization effect is directly related to the quality and yield of next year. Except plenty of nitrogen, phosphorus and potassium fertilizer materials, grapes still keep sensitive to nutrient elements as magnesium, iron. Once nutrients lack, grape would show deficiency symptoms.
Magnesium deficiency symptoms: brown withered spots between the old leaves; veins; upper leaves of branches appear waterlogging, and then form the necrotic tissue until middle part old leaves fall off.
Solution: (1) For acid soil, topdress 1~2 grams of magnesium sulfate for each plant; For neutral soil, topdress 1~1.5 grams of magnesium sulfate for each plant; (2) spray 2%~3% magnesium sulfate solution 2~3 times, 2 ~ 3 days for each interval.