The Fertilizers Containing Bacteria to Soil
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Fertilizers contained bacteria can be divided into: microbial fertilizers, compound microbial fertilizers and bio-organic fertilizers.
This article focuses on the benefits of compound microbial fertilizers and bio-organic fertilizers for improved soils: Low organic matter content, poor physical and chemical quality of the soil, harmful to the growth of crops, low soil fertility, crop is difficult to promote seedlings are the features of saline land.
The application of compound microbial fertilizer and bio-organic fertilizer can improve soil fertility and soil structure, reduce the speed of capillary water movement and water evaporation as well as there is a significant inhibition of salt effect. The application of compound microbial fertilizer and bio-organic fertilizer can also increase the content of soil available calcium. At the same time, the organic acids generated by microbial decomposition can also active the soil adsorption of calcium, enhance soil sodium adsorption of, 
resulting in desalination. The harmful ion content and PH value of saline-alkali soil will decrease obviously, the soil buffer performance will increase and the salt tolerance of the crop will be improved if there is applied the compound microbial fertilizer and bio-organic fertilizer.
It is difficult for saline and alkali soil to make seedlings, the general principle of fertilization is to increase the amount of composite microbial fertilizer and bio-organic fertilizer,and then appropriately control the application of chemical fertilizers. Basal fertilizer should be organic matter with high organic fertilizer, the amount of fertilizer should be little, and fertilizer should not close to the seedling, so as not to increase the concentration of soil solution, affecting the germination. Top dressing should base on the situation, timely application, to avoid excessive. In some places, you can use a large number of straw and green manure to reduce the harm of salt and alkali on crops.
Benefits of applying compound microbial fertilizers and bio-organic fertilizers on clay:
Clay generally contain organic, inorganic colloid, soil fertilizer ability is strong and nutrient is difficult to lose. But the fertilizer supply and effect of clay is slow, this kind of soil is good for the old seedlings but not new seedlings growth.” The application of compound microbial fertilizer and bio-organic fertilizer can improve clay aggregate structure, increase permeability, improve fertilizer and water retention capacity. Applying small amount of non-decomposed horse manure with compound microbial fertilizer and bio-organic fertilizer, the effect will be better.
Clay fertilizer and fertilizer ability. Fertilizer application should be combined with microbial fertilizer and bio-organic fertilizer. If the nitrogen fertilizer application is too much, the nutrient is not easy to lose so that the latter part of the fertilizer will play out which will easily lead to crop greedy late and pest occurrence.
Sand land can also use compound microbial fertilizer and bio-organic fertilizer: Sandy land generally have organic matter, the nutrient content is less, the fertilizer ability is low. However, the fertilizer supply of sandy land is good, after fertilizer ability is quick, this kind of soil is good for the new seedlings but not old seedlings growth. Fertilizer efficiency is strong and short.
As for sand soil, we should apply a large number of bio-organic fertilizer to improve soil organic matter content and fertilizer capacity. The ventilation of sandy land is good, the soil is warm, organic matter is easy to decompose, the application of not fully decomposed organic fertilizer or cow dung and other cold fertilizers can not influenced too much. We can apply green manure to improve soil physical and chemical quality.
The fertilizer applied 
in sand land can not be too much, or it will easily lead to “burning seedlings” or cause a lot of nutrient loss. Therefore, the use of fertilizer in sand land must be combined with microbial fertilizer, bio-organic fertilizer or other organic fertilizer. In addition, the amount of fertilizer should be small,that is, “eat little but eat more times” to improve fertilizer efficiency and reduce nutrient losses.
Compound microbial fertilizers, beneficial microorganisms in bio-organic fertilizers work like this:
Compound microbial fertilizer, bio-organic fertilizer contains a variety of functional microorganisms, when they get into the soil, in the process of growth, there will produce a large number of secondary metabolites which can promote the formation of soil aggregate structure. The formation of aggregate structure can make the soil loose and soft as well as can make gas, heat be more coordinated and reduce soil compaction. In conclusion, it is conducive to water and fertilizer conservation and ventilation as well as promote root development for crops to provide a comfortable growth environment. The improvement of soil physical and chemical qualities enhances the activities of microorganisms, thus maximizing the decomposition and transformation of organic matter, resulting in a variety of nutrients and stimulating substances, which in turn stimulate the growth and development of microorganisms so that promote crop growth, and ultimately increase yield. In addition, functional microorganisms in the crop roots around, the formation of dominant populations can inhibit or antagonize the growth and reproduction of harmful pathogens, reduce the extent of crop disease, and thus increase the production.
The article is quoted from: http://www.fert.cn/news/2017/09/08/111010200097.shtml
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