‌Core formula of corn foliar fertilizer spraying

Potassium dihydrogen phosphate + zinc-boron micro-fertilizer + Brassinolide
‌The core formula of corn foliar fertilizer spraying is a combination of potassium dihydrogen phosphate, zinc-boron micro-fertilizer and brassinolide. Adjusting the ratio in combination with different growth stages can significantly improve yield and stress resistance.

1. Core formula and function

‌Potassium dihydrogen phosphate (0.3%-0.5% concentration)‌
Provide phosphorus and potassium elements, promote filling and grain fullness, and enhance lodging resistance.
Experimental data show that after spraying, the weight of ears increases by 15%, and the thousand-grain weight increases to 330 grams.

‌Zinc-boron micro-fertilizer (chelated zinc + borax)‌
73% of my country's soils are zinc-deficient and 84% are boron-deficient. Supplementation can reduce the problems of bald tips and deformed ears, and increase yield by more than 15%.
Recommended concentration: 0.2% zinc fertilizer and 0.01% borax.

Brassinolide (10 ml/acre) ‌
Improve photosynthetic efficiency, promote root development, extend the filling period by 10 days, and increase stress resistance by 70%.


2. Phased spraying plan
Jointing stage (6-8 leaves)
‌Formula‌: 0.2% zinc sulfate + 0.01% borax + amino acid water-soluble fertilizer (diluted 1000 times)
‌Function‌: Promote ear row differentiation, increase the number of ear rows to 16 rows, and reduce bald tips.

Large trumpet stage (12-14 leaves)
‌Formula‌: Potassium dihydrogen phosphate (200 g/acre) + aminoethyl ester (height control)
‌Function‌: Shorten the base internode by 3 cm and reduce the lodging rate by 70%.

Grain filling period (15 days after silking)
Formula: Potassium dihydrogen phosphate (200g) + zinc sulfate (50g) + urea (0.5%)
Function: Prolong the grain filling time, increase the thousand-grain weight by 50g, and increase the yield per mu by 200 catties.

III. Precautions
Spraying time: Before 10 am or after 5 pm, avoid high temperature periods.
Spraying skills: Spray evenly on the front and back of the leaves, and the atomization should be fine to avoid burns.
Concentration control: Urea ≤2%, and the micro-fertilizer is strictly mixed according to the instructions.
Example effect: Experiments by the Inner Mongolia Academy of Agricultural Sciences show that the number of grains per ear increased by 15% in the plots sprayed with the above formula twice; after farmers in Shangqiu, Henan used it, the corn baldness rate decreased by 80%.