How to spray fertilizer on greenhouse vegetables? Teach you the correct method

Fertilizer solution concentration: During the spraying process, the fertilizer solution concentration must be appropriate to achieve good results. If the applied concentration is too high, it is not only unhelpful but harmful. Generally speaking, the suitable spraying concentrations for various micronutrient fertilizers are: boric acid or borax solution 0.05%-0.25%; ammonium molybdate solution 0.02%-0.05%; zinc sulfate solution 0.05%-0.2%; copper sulfate solution 0.01%-0.02%; ferric sulfate solution 0.2%-1%; if the fertilizer solution concentration is too low, the ideal effect will not be achieved.

Spraying period: The period for spraying micronutrient fertilizers must be determined according to different vegetable varieties and different micronutrient fertilizer types, and spraying at flowering time is generally suitable.

Usage and dosage: Generally, 40-70 kg of fertilizer solution is applied per mu, so that the vegetable stems and leaves are moistened.

Spraying frequency: Leaf spraying generally uses a relatively small amount of fertilizer, so it is difficult to meet all growth needs in one application, so the number of fertilizer applications should be appropriately increased to make up for the insufficient amount of fertilizer.