The application plan of liquid fertilizers on different crops needs to be precisely adjusted according to crop type, growth stage, and fertilization method to achieve efficient absorption and yield improvement. The following are specific application recommendations for the main crop categories:

1、 Facility vegetables

1. Fruits and vegetables (such as tomatoes, peppers, cucumbers)

Base fertilizer: Apply 2-3 tons of decomposed organic fertilizer and 30-50 kilograms of balanced water-soluble fertilizer (N-P ₂ O ₅ - K ₂ O=20-20-20) per acre before planting, and deeply plow into the soil.

Topdressing:

From slow seedling growth to budding stage: Apply nitrogen fertilizer lightly or not to avoid excessive growth.

Flowering and fruiting period: Apply balanced water-soluble fertilizer (5-8 kg/mu) every 10-15 days, combined with foliar spraying of boron fertilizer.

Blossoming period: Change to high potassium water-soluble fertilizer (such as 15-15-30), apply with drip irrigation every 8-12 days, and spray calcium magnesium fertilizer on the leaves to prevent fruit cracking and navel rot.

2. Leafy vegetables (such as spinach, lettuce, and bok choy)

Base fertilizer: Apply 1.5-2 tons of decomposed organic fertilizer and 30-40 kilograms of nitrogen phosphorus potassium compound fertilizer per acre.

Topdressing: After planting, apply 5-8 kg/mu of high nitrogen water-soluble fertilizer (such as 30-10-10) every 10-15 days, and stop fertilization 10-15 days before harvesting.

Foliar spraying: In the middle and late stages of growth, liquid fertilizers containing amino acids and alginate can be sprayed to promote leaf greening and thickening.

2、 Field crops

1. Wheat (Huang Huai region of North China)

Fertilization rate throughout the entire growth period: nitrogen 15-20 kg/mu, phosphorus 8-12 kg/mu, potassium 6-10 kg/mu.

Key fertilization period:

Upward stage, jointing stage, booting stage, and grain filling stage: Apply water-soluble fertilizers such as urea, monoammonium phosphate, potassium sulfate, etc. with water in 4 times.

Recommend pairing with water-soluble fertilizers containing amino acids and humic acid to promote tillering, strengthen roots, and cultivate large ears.

2. Corn

Seedling stage: Mainly nitrogen promotes root development.

From jointing to tasseling stage: Apply high nitrogen and high potassium water-soluble fertilizer to support robust stem and panicle differentiation.

Grain filling period: Spray foliar fertilizer containing potassium, zinc, and boron to enhance grain plumpness.

3、 Fruit trees (such as apples, citrus, grapes)

Before sprouting: Apply high nitrogen water-soluble fertilizer to the roots to promote the growth of new shoots.

Before flowering: Spray liquid fertilizer containing boron and zinc on the leaves to increase fruit setting rate.

Young fruit stage: Apply calcium fertilizer (such as calcium zinc phosphate liquid fertilizer) to prevent fruit cracking and navel rot caused by physiological calcium deficiency.

Blossoming period: High potassium water-soluble fertilizer+alginate foliar fertilizer promotes sugar accumulation and smooth fruit surface.

After harvesting: Apply balanced fertilizer to restore tree vigor.

4、 Economic crops (such as sugarcane, rice)

1. Sugarcane

From tillering stage to jointing stage: Apply 10-15 kilograms of high nitrogen and high potassium water-soluble fertilizer per acre to promote thick and robust stems.

Extension period: Spray foliar fertilizers containing silicon and zinc (such as Hechun Rich Suspension Silicon Zinc Fertilizer) to enhance lodging resistance and disease resistance.

2. Rice

Tillering stage: Apply nitrogen fertilizer with water to promote effective tillering.

From booting to heading stage: Spray foliar fertilizer containing phosphorus, potassium, and zinc to increase thousand grain weight.

It is recommended to use drones for fertilization, especially in the middle and lower reaches of the Yangtze River, to achieve precise and efficient application.

5、 General application points

Priority of water and fertilizer integration: Adopting drip irrigation, micro spraying and other methods to achieve "small amount multiple times" and improve fertilizer utilization efficiency.

Foliar spraying time: Choose early morning or evening, avoid high temperature and strong light, and reduce the risk of evaporation and burns.

PH control: Maintain the pH of the nutrient solution between 5.5-6.5 to facilitate nutrient absorption.

Avoid antagonistic reactions: Calcium containing fertilizers should not be mixed with sulfate containing fertilizers to prevent precipitation from clogging the drips.