Application of Ferrous Sulfate Heptahydrate in Agriculture

Ferrous sulfate heptahydrate (FeSO4·7H2O), commonly known as green vitriol, is an inorganic compound widely used in the field of sewage treatment. Its main functions include settling suspended solids, improving sludge characteristics, treating heavy metals, participating in redox reactions, removing sulfides and phosphates, promoting biological activity, and removing color.

Main functions of ferrous sulfate heptahydrate

1. Precipitation: Ferrous sulfate heptahydrate hydrolyzes in water to form iron hydroxide colloid, which can adsorb suspended solids, promote its coagulation and sedimentation, and accelerate the separation of solid particles.

2. Sludge characteristics: The sludge particles formed are large, small, and dense, and are easy to dehydrate.

3. Heavy metal treatment: Reduce heavy metal ions such as hexavalent chromium to trivalent chromium with lower toxicity and promote its precipitation.

4. Redox reaction: Participate in the redox reaction in wastewater to help remove certain difficult-to-degrade organic matter.

5. Removal of sulfides and phosphates: React with pollutants such as sulfides and phosphates in wastewater to form insoluble precipitates, thereby removing these pollutants.

6. Promote biological activity: Iron is an essential element for the growth of microorganisms. It can promote the activity of microorganisms in the biochemical treatment system and enhance the treatment effect.

7. Remove color: Ferrous sulfate heptahydrate is particularly suitable for the treatment of wastewater in printing and dyeing, papermaking and other industries, and can effectively remove the color in the wastewater.

Agricultural use

In agriculture, the main function of ferrous sulfate heptahydrate is to promote plant growth, improve the soil environment, and prevent and control pests and diseases.

1. Regulate soil pH

Ferrous sulfate heptahydrate is a physiologically acidic product that can regulate the pH of the soil and make the soil environment more suitable for crop growth. In alkaline soil, ferrous sulfate can neutralize alkaline substances in the soil and reduce the pH value of the soil, thereby reducing the adverse effects of alkaline soil on crop growth. Particularly suitable for alkaline soil, compacted soil, saline soil, soil contaminated by heavy metals and pesticides

2. Improve soil structure

It can increase soil pH, increase the number of beneficial microorganisms in the soil, improve plant disease resistance, and effectively improve soil compaction to prevent plant disease invasion

3. Supplement soil iron

As an iron fertilizer, it can effectively supplement the iron element in the soil, promote the synthesis of plant chlorophyll, improve photosynthesis efficiency, improve soil nutrient utilization, enhance soil water and fertilizer retention capacity, maintain fertilizer efficiency for a long time, and improve crop yield and quality. The application effect is significant

4. Can be used as a pesticide fungicide

Ferrous sulfate heptahydrate can be used as a pesticide fungicide, which has obvious prevention and control effects on diseases such as wheat smut and fruit tree rot. It can inhibit the growth and reproduction of pathogens, reduce the harm of diseases to crops, and protect the healthy growth of crops.

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