Granular composite microbial fertilizer - How does it help restore the inherent vitality of farmland?

For many long-term farmlands, problems such as soil compaction, decline in soil fertility, and poor growth of crops in successive plantings often occur. Many farmers tend to blindly increase the amount of chemical fertilizers, but neglect the maintenance of soil micro-ecology. Compost microbial granule fertilizers, as a type of agricultural input combining organic and inorganic nutrients with functional microbial communities, have gradually entered large fields, orchards, and greenhouse facilities in recent years. According to the agricultural industry standard NY/T 798-2015, composite microbial fertilizers are formed by specific beneficial microorganisms combined with organic matter, nitrogen, phosphorus, and potassium nutrients. Granular form differs from powder and liquid microbial agents and has its own unique application scenarios.

The greatest practical advantage of granular formulations lies in their compatibility with mechanized agricultural operations. They can be directly broadcast or applied through furrows, and they are less prone to moisture absorption and caking during storage and transportation. Liquid microbial agents have fast microbial activation, but the survival period of the microbial colonies in the soil is relatively short; powder fertilizers tend to cause dust when applied in the field. Granular fertilizers encapsulate the microorganisms with organic matter carriers, which acts as a food source and protective layer for beneficial bacteria, reducing the impact of sudden changes in temperature and pH. They are more suitable for preparing the soil for base fertilization and achieving continuous soil conditioning. Their mechanism of action is not to directly replace chemical fertilizers, but rather for the synergistic effect of the microbial colonies, organic matter, and basic nutrients. 
There are a large amount of fixed phosphorus, potassium and trace elements in the soil. These nutrients exist objectively but cannot be directly absorbed by the roots of crops. The Bacillus subtilis and phosphorus and potassium-decomposing strains in fertilizers can metabolize in the soil and secrete organic acids and polysaccharide substances, activating these inert nutrients and improving the overall utilization efficiency of fertilizers, reducing nutrient waste. Beneficial microorganisms will colonize around the crop roots, establishing a relatively stable rhizosphere microecology, balancing the soil microbial community structure, and alleviating the survival pressure caused by repeated cropping. The polysaccharides produced by microbial metabolism can also help form soil aggregates, gradually improving compaction and regulating the soil's aeration and water retention capacity.

It is necessary to objectively recognize that microorganisms are living entities. They function under specific environmental conditions and do not take effect immediately after being applied to the soil. The bacterial community is most suitable for an environment with a temperature range of 15-35°C and a soil moisture content of 60-70%. After application, it is recommended to cover the soil and water it promptly to avoid prolonged exposure to sunlight, as ultraviolet rays can directly inactivate the living bacteria. At the same time, it is best not to use them simultaneously with bactericidal agents, and the application intervals of the two should be more than 15 days. High-concentration fertilizers should also not be directly in contact with granular fertilizers to avoid affecting the survival of the bacterial community due to salt concentration. On plots with a lack of organic matter, the effect of using such fertilizers alone is limited. Combining with straw incorporation and decomposed organic fertilizers is more conducive to the continuous reproduction of the bacterial community. 
In some planting areas in the north, many planting bases incorporate granular composite microbial fertilizers into their bottom fertilizer schemes. The remote doctor series of composite microbial granular fertilizers under the Xinhe Biotechnology brand are designed following this technical logic. They take into account both the supply of basic nutrients and the maintenance of soil micro-ecosystems, and are suitable for various planting scenarios such as vegetable, fruit tree, and grain fields for base fertilizer application. Many farmers reduce the use of conventional fertilizers during the land preparation stage. After continuous application for one season to multiple seasons, it can be observed that the physical properties of the soil gradually change, the growth conditions of white roots and capillary roots of crops improve, and the resilience of the fields becomes more stable. 
However, it is also necessary to view this matter rationally. Soil improvement is a gradual process that is influenced by multiple factors such as original soil fertility, climate, and field management. The final performance of different plots may vary. When choosing such fertilizers, it is recommended to first check the fertilizer registration number, effective viable bacteria count, organic matter, total nutrients, and other label-registered indicators, and select products that have been registered in compliance with regulations. By doing a good job in farming, irrigation, rotation, and other supporting agricultural management, the fertilizer can better exert its own value and help farmland achieve sustainable cultivation.