Provide one or more essential plant nutrients, improve soil properties and improve soil fertility level of a class of substances. One of the foundations of agricultural production material. As early as the Western Zhou Dynasty, when China had been aware of the rot after the weed, there to promote the growth of Shuji role. "Qi Min Yao Shu" and described in detail the methods and the cultivation of leguminous green manure crop rotation with grass crops, etc.; also referred to using crop stalks and cow manure mixed, made after trampling and manure composting method. In fertilization, the "pan-sheng of the book" is explained in detail, emphasizing Shizujifei and complement Shi top application on the importance of crop growth. Tang and Song later as the promotion of rice in the Yangtze River, fertilization growing accumulation of experience, and thus concludes that "timely, appropriate soil and material should" fertilizing principle that fertilization should vary with climate, soil, crop factors, changes in setting. With the rise of modern chemical industry and development of a variety of chemical fertilizers have been brought forth. The mid-18th century, phosphate appeared first in the United Kingdom. 1870 German production of potash fertilizer. The early 20th century, the successful development of synthetic ammonia. Subsequently, compound fertilizers, trace elements, fertilizers and long-lasting fertilizer also have to sell. Due to the increase in volume and variety of chemical fertilizer and improve the quality of agricultural production in the total investment amount of fertilizer and increasing the crop production has also increased accordingly.
Wide variety of fertilizers, fertilizers provide plant nutrients, according to the characteristics and nutritional composition, is divided into inorganic fertilizer, organic fertilizer, organic inorganic fertilizer three categories. A large number of elements in inorganic fertilizer sub-fertilizer (N, P, K), in the amount of fertilizer elements (Ca, Mg, S,) and trace element fertilizers (Fe, Mn, Zn, Cu, Mo, B, Cl). A large number of elements in the fertilizer nutrient elements according to their amount of fertilizer is divided into units (only one nutrient elements), and compound fertilizer (containing two or more nutrient elements), the former, such as nitrogen, phosphorus and potash; the latter such as nitrogen phosphorus, nitrogen, potassium and phosphorus and potassium, as well as the dual NPK NPK compound fertilizer. Organic fertilizers, including organic nitrogen fertilizer, synthetic organic nitrogen fertilizer, etc.. Chinese people are accustomed to use animal manure, green manure, manure, compost, composting and biogas fertilizer and so on. Organic and inorganic fertilizers or semi-organic fertilizer, organic fertilizer and inorganic fertilizer by mechanical mixing or chemical reactions of fertilizer made. Fertilizers are often due to a variety of attributes, in addition to the above-mentioned categories, there are often other classification methods: ① by fertilizer physical state can be divided into solid and liquid fertilizers. Solid fertilizers are divided into powder and granular fertilizers. Fluid fertilizer is liquid state at normal temperature and pressure was fertilizer. ② according to the chemical properties of fertilizers can be divided into chemical acidic, alkaline and chemical neutral chemical fertilizers. ③ by selective absorption of fertilizers by plants after the soil reaction can be divided into physiological neutral and basic physical and physiological acidic fertilizer. ④ fertilizer nutrients to plants according to the validity can be divided into quick, slow-acting and long-acting fertilizer.
Wide variety of fertilizers, fertilizers provide plant nutrients, according to the characteristics and nutritional composition, is divided into inorganic fertilizer, organic fertilizer, organic inorganic fertilizer three categories. A large number of elements in inorganic fertilizer sub-fertilizer (N, P, K), in the amount of fertilizer elements (Ca, Mg, S,) and trace element fertilizers (Fe, Mn, Zn, Cu, Mo, B, Cl). A large number of elements in the fertilizer nutrient elements according to their amount of fertilizer is divided into units (only one nutrient elements), and compound fertilizer (containing two or more nutrient elements), the former, such as nitrogen, phosphorus and potash; the latter such as nitrogen phosphorus, nitrogen, potassium and phosphorus and potassium, as well as the dual NPK NPK compound fertilizer. Organic fertilizers, including organic nitrogen fertilizer, synthetic organic nitrogen fertilizer, etc.. Chinese people are accustomed to use animal manure, green manure, manure, compost, composting and biogas fertilizer and so on. Organic and inorganic fertilizers or semi-organic fertilizer, organic fertilizer and inorganic fertilizer by mechanical mixing or chemical reactions of fertilizer made. Fertilizers are often due to a variety of attributes, in addition to the above-mentioned categories, there are often other classification methods: ① by fertilizer physical state can be divided into solid and liquid fertilizers. Solid fertilizers are divided into powder and granular fertilizers. Fluid fertilizer is liquid state at normal temperature and pressure was fertilizer. ② according to the chemical properties of fertilizers can be divided into chemical acidic, alkaline and chemical neutral chemical fertilizers. ③ by selective absorption of fertilizers by plants after the soil reaction can be divided into physiological neutral and basic physical and physiological acidic fertilizer. ④ fertilizer nutrients to plants according to the validity can be divided into quick, slow-acting and long-acting fertilizer.