Get to know this fertilizer-"ferrous sulfate"

Sky blue or green ferrous sulfate powder or crystals are often seen in the agricultural material market, but many netizens still don’t know much about the role and use of ferrous sulfate. Today we have sorted out the role and use of ferrous sulfate. List them in detail for the reference of netizens.

The role of ferrous sulfate:

Generally, ferrous sulfate contains 19-20% iron and 11.5% sulfur. It is a good iron fertilizer. Frequent use of acid-loving plants can prevent the occurrence of yellowing disease. Because iron is necessary for the formation of chlorophyll in plants, when iron is deficient, the formation of chlorophyll is blocked, causing plants to suffer from chlorosis, and the leaves turn pale yellow. The aqueous solution of ferrous sulfate can directly provide iron that can be absorbed and utilized by plants, and can reduce the alkalinity of the soil.

At the same time, ferrous sulfate can also be used as a pesticide to prevent wheat smut, scabs on apples and pears, and rot on fruit trees; it can also be used as a fertilizer to remove moss and lichen from tree trunks.

How to use ferrous sulfate:

1. Fruit tree iron deficiency can use 0.2%~0.1% ferrous sulfate solution, spray after the fruit leaf buds germinate, spray once every 10 days or so, for 2 to 3 times, until the fruit leaves turn green, but the fruit tree leaves The effect of spraying after aging is relatively poor.

2. For gramineous crops with iron deficiency (such as rice, wheat, sorghum), you can spray with 3%~4% ferrous sulfate. Generally, spray once at the seedling stage for symptoms of chlorosis. If severe chlorosis, spray continuously. Apply 2~3 times, every 10~15 days. The ferrous sulfate solution should be prepared for immediate use, and a small amount of wetting agent can be added during spraying to increase the adhesion of the liquid to the leaf surface and improve the spraying effect.

3. Vegetables are deficient in iron, so 0.2%~0.5% ferrous sulfate can be used for spraying. When spraying, proper amount of water should be sprayed to avoid burning leaves. If the concentration of ferrous sulfate exceeds 0.5%, phytotoxicity may occur. .

4. Ferrous sulfate injection method: You can use a syringe to quickly inject 0.3% to 1% ferrous sulfate solution into the trunk, and then hang the infusion bottle on the tree to let the tree absorb slowly. This method has quick results. It will be effective after 3 days.

5. Ferrous sulfate-based application method: spray 2~2.5 kg of ferrous sulfate in 50~100 kg of organic fertilizer for each mature tree. After fully mixing, dig 8~10 small holes along the periphery of the canopy and apply Add organic fertilizer mixed with ferrous sulfate, and then cover the soil; for example, wheat can be directly applied to the soil at a rate of 30 kg per mu. The application of ferrous sulfate by the base application method can effectively supplement the iron content in the soil, prevent pests and diseases, loose soil, prevent soil compaction, and promote the development of crop roots. Moreover, the mixed application of ferrous sulfate and organic fertilizers can reduce the fixation of iron in the soil. Improve fertilizer efficiency.

Precautions for the application of ferrous sulfate:

1. Ferrous sulfate can be mixed with neutral and acidic pesticides, and 0.1% neutral detergent can be added during spraying to improve the effect.

2. Do not spray ferrous sulfate directly on fruit trees during the fruiting stage and vegetable seedling stage.

3. Avoid scorching hot weather when spraying ferrous sulfate, and it is suitable to spray in the early morning or after 4 pm.