Humic acid organic fertilizer can promote the formation of soil structure. Improve the pore condition. Improve the cationic absorption performance of soil. Increase the fertilizer supply ability of soil. Strengthen the soil buffer system. Improve acid soil, and promote the activities of beneficial microorganisms in soil. Details as following:
1、It is beneficial to the regulation of water, fertilizer, air and heat in soil.
When the aggregate structure of soil becomes better. Its bulk density decreases and the porosity increases and has good permeability. Because the color of humic acid fertilizer is dark, it is beneficial to the absorption of solar heat energy. When humic acid fertilizers are decomposed by microorganisms, heat is released. Especially when crop seedlings are unearthed in early spring season, the ground temperature can be increased and spring cold resistance can be played.
2、To facilitate the formation of soil aggregate structure.
The humic acid can promote the formation of the aggregate structure of the soil, and the application of the organic fertilizer to the soil can also improve the soil structure, mainly through the slow transformation of the soil microorganism, and the conversion process can be accelerated if the humic acid fertilizer is frequently applied.
3、Promote the activity of soil microorganisms.
The application of humic acid fertilizer in soil can aggravate the activities of microorganisms in soil. Especially the increase of soil autogenic nitrogen-fixing bacteria, which makes the content of nitrate increase obviously, and enriches the nitrogen nutrition of soil and improves the nutritional conditions of crop roots.
4、Modify the barren soil and the saline-alkali soil.
Long-term adherence to the application of humic acid fertilizer will fundamentally transform the barren soil into good field. In the south, using the humic acid fertilizer to improve the red soil of the “acid, barren, harden, dry”, the outstanding effect is also obtained. Since the acid of the humic acid can be neutralized with the alkaline of the saline soil, the humic acid can adjust the pH of the soil to achieve the effect of controlling the saline-alkali.
5、The humic acid can form complex with trace elements.
Such as iron (Fe), aluminum (Al), copper (Cu), manganese (Mn), zinc (Zn), etc. in some insoluble salt forms, and is dissolved in water to be absorbed by crops. The price of these micro-fertilizer chelated trace elements is very high. The general farmers do not want to buy, and the humic acid can be used as a natural chelating agent with a wide source and low price , which mixed with the trace elements so as to be easy to be absorbed by the crops.
6、Reducing the fixation of soluble phosphorus in soil.
To improve the utilization rate of phosphorus fertilizer and promoting the activation of trace elements in soil, calcium phosphate [Ca3 (PO4) 2] in soil is usually difficult to dissolve in water, while hydrogen phosphate and dihydrogen phosphate formed after the reaction with humic acid are soluble in water and can be absorbed by crops.