The correct usage method of ammonium sulfate

Ammonium sulfate (NH ₄) ₂ SO ₄ is a common inorganic fertilizer widely used in agriculture, horticulture, and industry. It not only contains the nitrogen required by plants, but also is rich in sulfur, making it a very effective fertilizer. The use of ammonium sulfate has strict operating procedures, and correct use can improve the efficiency of fertilizer utilization and promote healthy crop growth. This article will briefly introduce the correct use of ammonium sulfate.

一、Basic characteristics of ammonium sulfate
Ammonium sulfate appears as white crystals, soluble in water, and has strong acidity. Its nitrogen content is high, usually around 21%. The nitrogen in ammonium sulfate exists as ammonium nitrogen, which can be quickly absorbed by plants and release sulfur elements for crop growth. Ammonium sulfate is suitable for most soils, especially those lacking sulfur, but caution should be exercised when applying it to acidic soils to avoid exacerbating soil acidification.

二、The main uses of ammonium sulfate
1. As a nitrogen fertilizer, ammonium sulfate can provide sufficient nitrogen source for plants. Nitrogen is an essential element for plant growth, which helps promote leaf growth and amino acid synthesis.
2. As a sulfur fertilizer: Sulfur is a necessary element for plants to synthesize proteins, maintain cell function, and increase disease resistance. Especially for certain crops such as rapeseed and peanuts that require high sulfur, ammonium sulfate has a significant promoting effect.
3. Improving soil acidity: Applying ammonium sulfate to the soil increases its acidity, making it suitable for planting plants that require acidic soil environments, such as blueberries.

三、The correct usage method of ammonium sulfate
1. Reasonable application amount: The amount of ammonium sulfate used should be determined based on soil fertility, crop species, and growth stage requirements. Generally speaking, the application rate per acre of land is between 25-40 kilograms, but different crops have different nitrogen requirements, and the specific application rate needs to be adjusted based on soil testing results or professional advice. Excessive application of ammonium sulfate can lead to excessive nitrogen supply, causing rapid crop growth and even root burning.
2. Application time: The application time of ammonium sulfate should be selected during the critical period of crop growth. For most crops, ammonium sulfate is suitable for application after sowing in spring, especially during the early stages of crop growth. In addition, staggered application can avoid significant nitrogen loss and improve fertilizer utilization efficiency. It is recommended to apply appropriate topdressing during the jointing and filling stages of crops.
3. Fertilization method:
There are various ways to apply ammonium sulfate, including base fertilizer, topdressing, and foliar spraying
(1) Base fertilizer: Apply ammonium sulfate to the soil before sowing and mix it into the soil to ensure that crops can absorb sufficient nitrogen and sulfur from the beginning.
(2) Topdressing: During the growth process of crops, especially during the vegetative growth stage and flowering period, topdressing can be applied, and the application amount can be increased or decreased appropriately according to the soil conditions. When fertilizing, be careful not to spread the fertilizer too concentrated on the roots of the crop to avoid burning the roots.
(3) Foliar spraying: Ammonium sulfate solution can also be sprayed on the leaves, especially in dry and soil water deficient conditions, which can effectively supplement nitrogen and sulfur elements. When using, ammonium sulfate should be dissolved in water with a concentration controlled between 0.2% and 0.5% to avoid excessive concentration causing leaf damage.
4. Post application treatment: After the application of ammonium sulfate, appropriate watering should be carried out to help the fertilizer dissolve better and penetrate deep into the soil, preventing the accumulation of fertilizer on the soil surface and affecting the absorption of crop roots. In addition, when using, try to avoid mixing ammonium sulfate with lime or calcium fertilizer, as these substances will neutralize the nitrogen in ammonium sulfate and reduce fertilizer efficiency.

四、Precautions for ammonium sulfate
1. Avoid excessive use: Excessive application of ammonium sulfate can exacerbate soil acidification, affect plant root growth, and even lead to plant death. Adjust according to the pH of the soil during use.
2. Applicable soil: Ammonium sulfate is suitable for use in acidic to neutral soil. For alkaline soil, special caution should be taken when using it to avoid excessive soil acidification and affecting crop growth.
3. Safety protection: Ammonium sulfate is a strongly acidic substance, and appropriate protective equipment should be worn when applying to avoid skin contact. During the fertilization process, avoid contact with eyes and respiratory tract to prevent irritation or allergic reactions.
4. Storage: Ammonium sulfate should be stored in a dry, cool, and well ventilated place, avoiding contact with water, acidic substances, and strong oxidants.

In summary, ammonium sulfate, as an excellent nitrogen and sulfur fertilizer, can provide crops with the necessary nutrients and promote their healthy growth. Reasonable application of ammonium sulfate can not only increase crop yield, but also improve soil fertility. But in the process of use, the prescribed application amount and method should be strictly followed to avoid soil acidification or fertilizer waste. Through scientific fertilization, we can fully utilize the effects of ammonium sulfate and ensure the sustainable development of agricultural production.