China joined the WTO after all to accelerate the development of green food as to improve the competitiveness of agricultural products, to meet the international market challenges important countermeasures. "Green wave" is sweeping across the land. However, more and more farmers want to know what kind of fertilizer products can reach the quality standard of green. Not only can increase quality, and can reduce the pollution to water saving, energy saving; and the scale of operation; both can satisfy the needs of fertilization, and can realize the deep application of fertilizer. Using green fertilizer model to replace the serious pollution of chemical fertilizer will be a trend.
With high quality natural humic acid as the carrier, using new technology, scientific method and configuration, which is rich in organic matter humic acid, reasonable ratio of nitrogen, phosphorus and potassium and the amount of trace elements in long-term, available, effective in one, for the humic acid organic inorganic fertilizer on Soil and plant safety, no pollution, no pollution, is the preferred fertilizer green organic food. According to the People's Republic of China Department of Agriculture released green food fertilizer guidelines for the use of the NY/T394-2000 standard, humic acid fertilizer belongs to a grade green food use of fertilizer.
Humic acid can unit fertilizer, and can also form a compound fertilizer with humic acid as the main body. Is humic acid fertilizer with humic acid as main ingredients, and other chemical fertilizer and multiple elements and substances formed by the combination of compound fertilizer, organic inorganic fertilizer. Humic acid containing carbon, nitrogen, phosphorus, sulfur and other important elements for crop need, adding an appropriate amount of nitrogen, phosphorus and potassium. Humic acid fertilizer with high efficiency, and is a kind of fertilizer synergist, can improve the utilization ratio of nitrogen phosphorus and potassium 1-2 times, improve the utilization rate of about 1 times. Because of its stimulation, buffering and other functions, also known as fertilizer, fertilizer, respiratory stimulation buffer fertilizer. Humic acid compound fertilizer application with a common compound fertilizer application method, can broadcast, with application, can also be used as base fertilizer and top dressing, have obvious effect on various crops, 50 acre application - 100Kg. In twenty-first Century, humic acid fertilizer become rookie in many domestic exhibitions, double cross, more and more farmers favor.
First, the concept of humic acid
Humic acid (humic acid, abbreviated HA) is a plant and animal remains, mainly plant remains after the decomposition and transformation of microorganisms, a kind of organic matter as well as a series of geochemical process of the formation and accumulation of. Humic acid is not pure material, but a non uniform high polymer, can also be regarded as a kind of amorphous polymer colloid. The causes of humic acid in the raw material, depending on temperature, pressure and time, can be divided into natural and synthetic.
The formation of natural humic acid exists widely in the soil, lakes, rivers, sea water and sediment, also widely exists in all kinds of peat, lignite, weathered coal and shale containing carbon in sedimentary rock.
Two, the characteristics of weathered coal
The characteristics of weathered coal and weathered coal (coal outcrop) is close to the ground or in the shallow surface of lignite and bituminous coal and other long-term exposure to the sun and air, rain and snow, sand permeability and weathering in the atmosphere, mainly by the coal plant experienced a reductive environment in the coalification process, and then placed in surface flow under the influence of oxidizing environment, affected by air and water and slowly caused by oxidation. The oxygen content of weathered coal humic acid content, high adhesion decreased as classification features. After weathering coal, pale, tarnish, strength reduction. Coal weathering to go through three stages. The first stage, the surface oxidation of coal. Organic oxygen and coal formed a coal oxygen compound, at the same time, CO, CO2 and a small amount of water generated. The second stage, the stage of formation of humic acid. This stage continued role in oxidant, coal oxygen complex decomposition, release of reactive oxygen, oxidation of humic acid (regeneration humic acid) and gradually increased. With the deepening of the depth of oxidation, regeneration of humic acid reached a maximum and began to decline. After weathering coal HA up to 50%~80%. The third stage, changes in the chemical composition, the weathering of carbon and hydrogen content decreased, oxygen content increased, active functional groups increased with the increase of regeneration; and humic acid content, calorific value decreased, ignition point decline.
Since our country has weathered coal humic acid since 1980, exported to Japan, Southeast Asia and other countries and regions has been good. With the change of fertilizer requirement of ecological agriculture, attach importance to the application of weathered coal humic acid fertilizer in the appropriate modification, such as fertilizer to improve the water solubility of humic acid compound fertilizer, controlled release fertilizer in to increase innovation, explore the effective combination of humic acid and fertilizer, approaches and methods of release, strengthen the humic acid and the effective combination with other fertilizer coating materials and the process of the combination, pay attention to HA and animal manure and other organic fertilizer combination and modification, comprehensive utilization will be broader.
Three, the application of humic acid
Humic acid is a kind of amorphous polymer mesh organic material. In addition to Compendium of Materia Medica records "Wujin San" (humic acid component) pharmaceutical applications, research involving humic substances in the field of industry and agriculture in more than 200 years of history. With the rapid development of science and technology, the increase of the raw material can be formed of humic substances in continuously, the application of humic acid content is more and more rich.
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