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What is soil organic matter? Two


6. Improve soil nutrition.
 Humus in organic matter and n p k compound fertilizer have  complexation, which can form complexes or chelates with phosphorus, iron and aluminum ions, avoid the precipitation of insoluble phosphate and increase the amount of effective nutrients.
7. Promote the physiological activity of plants
  Humic acid can promote the physiological activity of plants at a certain concentration. 
(1) the dilute solution of humate can change the carbohydrate metabolism in plants, promote the accumulation of reducing sugars and increase the osmotic pressure of cells, thus enhancing the drought resistance of crops.
 (2) increase the activity of peroxygenase, accelerate the seed germination and nutrient absorption, and thus increase the growth rate. 
(3) it can strengthen the respiration of crops and increase the permeability of cell membrane, thus improving its ability to absorb nutrients, accelerating cell division and enhancing root development.
 What is soil organic matter? (二)
8  Reduce pollution of pesticides and heavy metals
  Humus in the n p k compound fertilizer produced by the compouond fertilizer production line helps to eliminate pesticide residues and heavy metal pollution in soil as well as the toxicity of Al, Mn and Fe in acidic medium. In particular, brown saproic acid can increase the solubility of some pesticides, such as DDT and triazobenzene, etc. remaining in soil, accelerate their leaching out of soil, and reduce pollution and toxicity. Humic acid can also be complexated with some metal ions. Due to the water-solubility of the complex, toxic metal ions are likely to be discharged from soil with water, reducing the damage to crops and pollution to soil.
How to increase the organic matter ?
Compost, , cake fertilizer, human and animal manure are good organic fertilizer. With the progress of technology, more and more organic fertilizer equipments like new type organic fertilizer production line and bio-fertilizer production line are used to produce thses high-quality fertilzers for market and planting, the commercial production of organic fertilizer has spread to every corner of the production, choose ripe and good-quality organic fertilizer is a direct and effective way to increase soil organic matter. 
It is very effective for increasing soil organic matter to popularize the method of corn stalk mechanical crushing and rematurity, after the crop harvest, they will be chopped up, not through the heap of decomposition directly into the soil is straw back to the field.Straw returning to the field can promote the formation of soil structure, the fixation and preservation of nitrogen and the release of soil insoluble nutrients.
Organic matter is added to traditional large amount of elemental fertilizers, for example, humic acid is added to some compound fertilizers. Here NPK compound fertilizer production line  and  bb production line are good choice for the demands of organic compound fertilizer, these fertilizers can not only supply traditional nutrients, but also supply materials with improved soil effect, which is also a good compensation for soil organic matter.