Vegetable crop is calcium, people tend to focus on nitrogen, phosphorus and potassium in the plant of the application, and mostly of calcium fertilizer is not taken seriously. With the proliferation of cultivation, is more likely to result in greenhouse soil calcium deficiency. Therefore, the vegetable calcium nutritional deficiency problems, has become a prominent issue in cultivation. So, how to crop the calcium?
Reasonable selection of calcium fertilizer
Different nature of the different calcium fertilizers, soil pH value for 6.5~7.5 in the greenhouse, should be alkali or neutral fertilizer, such as Hydrated lime, calcium nitrate, rather than physiological acid acid or lime nitrogen fertilizer containing calcium and nutrients, General p as superphosphate, calcium magnesium phosphate and calcium phosphates are also important sources of calcium. Bone meal, wood ash contains a certain amount of calcium, it is impossible to ignore the source of calcium and can be selected depending on the situation.