I. What does sulfur-based compound fertilizer mean
Sulfur-based compound fertilizer means that the source of potassium is potassium sulfate, or potassium chloride is removed from chloride ions. The compound fertilizer, and the content of chloride ion does not exceed 3%. The compound fertilizer has a particularly high concentration, low chlorine content, no pollution to the environment, high fertilizer efficiency and low price, and can be applied to most crops.
Sulfur-based compound fertilizers are more suitable for crops with high economic value such as fruits and vegetables, because these crops require a large amount of fertilizer and many times of top dressing. Using sulfur-based compound fertilizers as top dressing, the fertilizer effect will be released quickly, which is conducive to the growth of vegetables and the expansion of fruits and vegetables. At the same time, sulfur is also conducive to improving the quality of these crops.
Sulfur-based compound fertilizer is also suitable for dry field crops, especially for crops that prefer sulfur and avoid chlorine, or sulfur-deficient, saline-alkaline soils. There is no residual pollution when used on these crops. Sulfur-based compound fertilizer can also be used as base fertilizer or top-dressing fertilizer. Generally, more top-dressing fertilizer is applied, which can meet the nutrient requirements of crops in different growth periods.
Second, the difference between sulfur-based compound fertilizer and chlorine-based compound fertilizer
1. Different ingredients
The chlorine content of sulfur-based compound fertilizer is low, the national standard is less than 3%, and it contains a large amount of sulfur, which can effectively improve the symptoms of soil sulfur deficiency, while chlorine-based compound fertilizer contains a large amount of chlorine, which has adverse effects on some crops.
2. Different processes
The chloride ion content in the potassium sulfate type compound fertilizer is extremely low, and the chloride ion is removed during the production process; In the production process, the chlorine element that is harmful to chlorine-avoiding crops is not removed, so the product contains a large amount of chlorine element.
3. Different scopes of application
Chlorine-based compound fertilizers have adverse effects on the yield and quality of chlorine-avoiding crops, and seriously reduce the production of such economic crops. Economic benefits; sulfur-based compound fertilizers are suitable for all kinds of soils and crops, and can effectively improve the appearance and quality of various economic crops, and can significantly improve the grade of agricultural products.
4. Different fertilizer effects
Chlorine-based compound fertilizers form a large amount of chloride ion residues in the soil, which can easily cause soil compaction, salinization and alkalization and other adverse phenomena, thereby deteriorating the soil environment and reducing the nutrient absorption capacity of crops. The sulfur element of sulfur-based compound fertilizer is the fourth largest nutrient element after nitrogen, phosphorus and potassium, which can effectively improve the situation of sulfur deficiency and directly provide sulfur nutrition for crops.
5. Different application methods
Chlorine-based compound fertilizer can be used as base fertilizer and top dressing, but not as seed fertilizer. When used as base fertilizer, it can be used in neutral and acidic soil It should be mixed with organic fertilizer, phosphate rock powder, etc., and it should be applied early as top dressing. The sulfur-based compound fertilizer can be used as basal fertilizer, top dressing, seed fertilizer and top dressing outside the root.
Sulfur-based compound fertilizers are widely used, and have good effects on sulfur-deficient soils and vegetables that require more sulfur, such as onions, leeks, and garlic. , soybean and kidney bean, the application of sulfur-based compound fertilizer has a good response, but it is not suitable for application in aquatic vegetables.
