Composite biofertilizer refers to biological products containing a variety of beneficial microorganisms. The advantage of this fertilizer is that it has a comprehensive effect, which can improve the nutrition of crops, and it can also promote health and disease resistance, and it can also enhance the biological activity of the soil. At the same time, each strain can promote each other. Therefore, the composite bio-fertilizer has strong adaptability and stress resistance, and has long-lasting and stable fertilizer effect. It is the direction of bio-fertilizer development in the future.
Existing studies have used complex microbial fertilizers such as macronutrients, trace elements, rare earth elements, or plant growth regulators to compound a microorganism with other nutrients, but no matter which compounding method, they must pay attention to The pH, salt concentration, or formulation in the formulation itself cannot affect the survival of the microorganism, otherwise the compounding will fail.
When multiple strains are compounded, it must be noted that the various microorganisms among them do not have scorpion action, and it is best to have a promoting effect; in addition to using a variety of combinations of bacteria, it is better to use the same strain in the infection. A variety of strains with strong strength, high nodulation rate, high nitrogen fixation efficiency, strong adaptability, high reproduction speed, and strong resistance to stress are used to complement each other and promote each other. At present, China's various composite biological fertilizers fall into this category.
Complex microbial fertilizer can only fully exert its effect of increasing production if it satisfies the conditions for growth and development of various beneficial microorganisms, such as rich organic matter, appropriate amount of phosphate fertilizer, appropriate pH, moisture and temperature.
Compound bacteria fertilizer can be used as base fertilizer or top dressing. When applying, it is best to inoculate the broth into the organic fertilizer and mix it before use; it is also possible to inoculate the broth into a small amount of organic fertilizer for about 1 week, and then apply a large amount of organic fertilizer. However, it should be applied immediately after mixing, and long-term storage will cause loss of nutrients.
The current development of microbial fertilizers is progressing from legume inoculants to non-legume fertilizers; development of inoculants to composite biofertilizers; development of single bacterial preparations to compound bacterial preparations; and development of single bacterial preparations to composites Development of strain preparations; development from single-function to multi-function; development from spore-free species to spores. It can be expected that microbial fertilizers will play a greater role in the continued agricultural development in the future.
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