Aquaculture

Agricultural field: Magnesium and sulfur nutritional supplements

Core function: Magnesium is the core component of chlorophyll, and sulfur is a constituent element of amino acids (such as cysteine) and enzymes. Magnesium sulfate heptahydrate can simultaneously supplement the essential medium elements (Mg, S) for crops, improving crop quality and yield.

Specific products and usage:

· Foliar fertilizer: It is used for vegetables (tomatoes, cucumbers), fruit trees (citrus fruits, grapes), field crops (rice, corn), etc., to prevent "magnesium deficiency syndrome" (yellowing of leaves, decline in photosynthetic efficiency).

Usage: Prepare a 0.2%-0.5% aqueous solution of magnesium sulfate heptahydrate (e.g., add 200-500g to 100L of water), and spray it on the leaves during the growth period of crops (such as the young fruit stage of trees and the fruit setting stage of vegetables), once every 7-10 days for 2-3 consecutive times.

· Base fertilizer/top dressing: It is used in magnesium-deficient soil or sandy soil (magnesium is prone to loss), and can be directly applied as crystal or mixed with compound fertilizer.

Usage: Apply 500-1000g per fruit tree (along the drip line trench of the tree crown). Apply 10 to 15 kilograms per mu for vegetables (spread and then plough). For field crops, apply 8-12kg per mu (combined with sowing or topdressing at the seedling stage), which can increase the sugar content of fruits (such as the sweetness of grapes by 1-2 degrees) and the stress resistance of crops (drought resistance and disease resistance).

· Aquaculture: Regulate water hardness (Mg²⁺ concentration) and pH value, promote the reproduction of algae (such as chlorella), and provide natural feed for fish and shrimp.

Usage: Apply 5-10kg per mu of water body, dissolve it and then sprinkle it all over the pond to maintain a concentration of 0.5-1.0mg/L in the water body.