The application of calcium-magnesium fertilizer can achieve a threefold improvement at the same time:
Soil structure improvement: alkaline calcium ammonium nitrate (pH 8.0) can neutralize the acidity of southern red soil and reduce the concentration of active aluminum. Calcium ions regulate soil pH and promote the uptake of nitrogen, phosphorus and potassium by crops.
Physiological disease control: the control rate of tomato navel rot is more than 75%, and the incidence of apple bitter pox is reduced by 60%.
Improvement of photosynthetic efficiency: magnesium increases the content of chlorophyll, promotes the accumulation of starch and sugar, and increases the sugar content of dragon fruit by 1.5-2.0 degrees.
Especially in magnesium-deficient areas in the south (Jiangxi, Fujian, etc.), adding 10 kg of magnesium nitrate fertilizer per mu can increase the sugar and starch content of fruits. Drip irrigation can accurately regulate the ratio of calcium and magnesium in facility agriculture, and solve the problem of fruit softening caused by continuous cropping obstacles
