The added manure fertilizer efficiency a, refers to in the fertilizer production process join alginic acid, humic acid and amino acids and other natural active substances in the production of fertilizer modified synergist.
Value-added fertilizers need to meet some of the features, such as synergistic agent effective trace, adding amount of between 0.3% ~ 3%; in accordance with urea, diammonium phosphate and compound fertilizer, such as national standards; efficiency significantly, add synergist and conventional functions can be detection; synergist for natural plant source material and its extract, is harmless to the environment; process is simple and low cost.
At present, there are three main types of fertilizer modification efficiency technology, including slow release method, stability method, and the method of increasing the efficiency. Sustained - release method through the polymer coated slow-release, synthetic slightly soluble state of slow release fertilizer and other methods to improve the efficiency of; stability method by adding urease inhibitor, digestion inhibitors, such as the modified synergistic, often called the stability of fertilizer; synergist method, that is, by adding biological live material class nitrogen fertilizer synergist, such as kelp acid, amino acid, humic acid, synergistic agent modified fertilizer is also called the value-added fertilizer.
Compared with the coated fertilizer and stable fertilizers, urea formaldehyde fertilizer, value-added fertilizer with secondary processing, has the advantages of simple process, low cost, using technology is not high, no corrosion to equipment, safety and environmental protection and stable results features does not exist. Therefore, it is necessary to develop the value added fertilizer in the condition that the country implements the zero growth action of the fertilizer use and the agricultural production system to the standardization and the scale change. At present, Hetani Soso, zinc alginate Urea Humic acid diammonium in application Chinese added fertilizer.
Through field experiments in all parts of China, the results showed that the average yield of crops increased by 9.6%, and the average nitrogen use efficiency increased by 7.9%.