Biological fertilizers, medium-element fertilizers, ammonium phosphate fertilizers, macro-element water-soluble fertilizers, and organic fertilizers.
1. Biofertilizer
Biofertilizer in a narrow sense is a product that enables crops to obtain specific fertilizer effects through microbial life activities. It is also called an inoculant or bacterial fertilizer. It contains no nutrients of its own and cannot replace chemical fertilizers.
In a broad sense, biofertilizers are products that contain both nutrients needed by crops and microorganisms. They are a combination of biology, organic and inorganic. They can replace chemical fertilizers and provide various types of nutrients needed for crop growth and development. Nutrients.
2. Medium-element fertilizer
Medium-element fertilizer refers to the content of calcium, magnesium and sulfur in the dry matter components of crops, generally ranging from 1 to 10,000 percent. One part is called medium element fertilizer, and the fertilizer containing these elements is called medium element fertilizer. Including calcium fertilizers (such as lime, calcium chloride), magnesium fertilizers (such as magnesium sulfate, anhydrite) and sulfur fertilizers (such as sulfur, gypsum). Their application is limited to certain soils and crops.
3. Ammonium phosphate fertilizers
Ammonium phosphate fertilizers refer to nitrogen and phosphorus compound fertilizers made by neutralizing phosphoric acid (including polyphosphoric acid) and ammonia and processing. This is the largest and most popular type of chemical fertilizer. It is suitable for almost all soils and crops. It has a high concentration of active ingredients and is not prone to moisture absorption and caking.
4. Water Soluble Fertilizer with Large Elements
Water Soluble Fertilizer (WSF for short) is a multi-compound fertilizer that can be completely soluble in water. It can quickly It dissolves in water and is more easily absorbed by crops, and its absorption and utilization rate is relatively high.
5. Organic fertilizer
Organic fertilizer is also called "farm fertilizer". Any fertilizer that uses organic matter (compounds containing carbon) is called organic fertilizer. Including human waste, manure, compost, green manure, cake fertilizer, biogas fertilizer, etc. It has the characteristics of many types, wide sources, and long fertilizer effect.
Most of the nutrients contained in organic fertilizers are in an organic state, which is difficult for crops to use directly. Through the action of microorganisms, a variety of nutrients are slowly released, and nutrients are continuously supplied to crops. The application of organic fertilizers can improve soil structure, coordinate water, fertilizer, air and heat in the soil, and improve soil fertility and land productivity.
Baidu Encyclopedia-Fertilizer