1、 Characteristics of Deshen's "Soil Improvement Type" Composite Microbial Agent Product

The composite microbial agent produced by Liaoning Deshen Microbial Company is mainly composed of actinomycetes, yeast, lactic acid bacteria, and Bacillus subtilis as functional strains, which have the functions of loosening soil, inhibiting diseases, and promoting yield increase. Among them, soil actinomycetes can decompose organic matter in the soil into simple compounds to increase crop nutrition, and can also synthesize some beneficial metabolites. These products have various biological activities such as inhibiting pathogenic fungi and resisting viruses, effectively reducing soil borne diseases. By producing substances such as polysaccharides, they promote the aggregation and granulation of soil particles, improve soil stability and water retention, and play a crucial role in soil ecosystems. Soil yeast is a new type of soil loosening and improving agent that combines the advantages of peptide protein's resistance to disease and stress, the fertile soil properties of microorganisms, and the loosening properties of new soil loosening agents. It is a high-quality raw material aimed at solving the problems of severe soil compaction, reduced beneficial microorganisms, intensified salinization, low organic matter content, and poor water retention performance. Soil yeast has strong biological stability, can quickly loosen soil, supplement soil probiotics, promote growth, resist diseases and pests, improve quality, and increase yield and harvest. Lactic acid bacteria can inhibit the proliferation of pathogenic bacteria caused by continuous cropping obstacles. Bacillus subtilis can utilize proteins, various sugars, and starch to break down tryptophan to form indole, which promotes crop growth. It can also produce antibiotic substances that can inhibit the growth of bacteria, viruses, fungi, and pathogens, strengthen soil microecology, and promote crop health.

Liaoning Deshen Microbial Agent contains three types of microorganisms, namely actinomycetes, yeast, lactic acid bacteria, and spore forming bacteria. It not only effectively enhances soil biodiversity, decomposes organic matter, and releases nutrients that crops can absorb and utilize, but also improves soil aggregate structure, which has significant advantages in the restoration of saline alkali land. Finally, the combination of microbial agents can fundamentally inhibit pathogenic fungi and reduce soil borne diseases. Liaoning Deshen microbial compound inoculum has carried out a large number of research and development in soybean, peanut, rice, corn, sugar beet, sweet potato, vegetable, fruit and other crop varieties, and accumulated the experience and research data of microbial application in the above crops to increase the yield of soybean and peanut by more than 25%, rice and sugar beet by more than 15%, and sweet potato by more than 30%. Liaoning Deshen microbial agent has significant effects on soil improvement, crop product enhancement, and quality improvement. It achieved a 34.6% increase in yield in the 2023 saline alkali rice planting demonstration and significant results in seedling emergence rate and yield in the 2024 Baicheng Da'an saline alkali corn planting demonstration.

2、 Mechanism of action

2.1 Improving Soil Physical Structure

Breaking through compaction: Bacillus subtilis, Bacillus licheniformis, and other bacteria produce viscous substances such as extracellular polysaccharides during their growth and reproduction process. These substances act like "glue" to bind soil particles together, forming large aggregate structures that break the tight arrangement of soil particles caused by long-term use of fertilizers, thereby breaking through soil compaction, increasing soil porosity, and improving soil aeration and permeability.

Drought resistance and moisture retention: The formed good granular structure enables the soil to store water like a sponge, slowly releasing it during drought and enhancing the soil's water retention capacity. Meanwhile, the activity of microorganisms can also promote root growth, making the roots more developed, enhancing the ability of crops to absorb water from the soil, and improving crop drought resistance.

2.2 Improving soil fertility and increasing organic matter
·Decomposing and converting nutrients: Actinobacteria, yeast, and other microorganisms in the composite microbial agent can decompose and convert insoluble mineral organic nutrients in the soil into forms that are easily absorbed by plants. For example, they can decompose organic phosphorus and potassium in the soil, releasing available phosphorus and potassium for crops to absorb and utilize, and improving soil nutrient availability.

·Promoting organic matter accumulation: Microorganisms produce large amounts of organic matter during metabolic processes, such as polysaccharides, proteins, etc., which further enrich soil organic matter. At the same time, microorganisms can accelerate the decomposition of organic fertilizers, allowing them to be better adsorbed and preserved by the soil, increasing the content of soil organic matter, and providing a continuous source of nutrients for soil microorganisms and plant growth.

2.3 Optimizing Soil Microbial Communities
Increasing the number of beneficial bacteria: Directly adding beneficial microorganisms such as lactic acid bacteria and yeast to the soil can rapidly increase the number and types of beneficial bacteria in the soil, and change the soil microbial community structure. These beneficial bacteria occupy ecological niches in the soil, competing with pathogens for space and nutrients, and inhibiting the growth and reproduction of pathogens.

·Secreted antibacterial substances: Bacillus subtilis, lichen spore forming bacteria, etc. can produce antibacterial substances such as antibiotics and bacteriocins, which have direct inhibitory or killing effects on soil pathogens such as Fusarium and Fusarium graminearum, effectively preventing the occurrence of soil borne diseases.

2.4 Reduce the use of fertilizers and pesticides
Reducing fertilizer dependence: The combination of composite microbial agents and organic fertilizers can improve soil fertility and nutrient availability, meet the nutrient requirements of crop growth, and reduce the amount of fertilizer applied. For example, nitrogen fixing bacteria can fix nitrogen in the air into usable nitrogen for plants, reducing the use of nitrogen fertilizers.

Reduce pesticide demand: Due to the optimization of soil microbial communities, soil borne diseases are reduced, and crops grow robustly with enhanced disease resistance, thereby reducing dependence on pesticides, decreasing pesticide usage, and mitigating environmental pollution.

2.5 Improving crop quality and increasing yield
Promoting crop growth: Plant hormones produced by microorganisms (such as auxin, cytokinin, etc.) can stimulate crop root growth, enhance root absorption capacity, promote aboveground growth of crops, improve crop photosynthesis efficiency, increase the accumulation of photosynthetic products, and thus increase crop yield.

Improving quality: Reasonable nutrient supply and good soil environment make crop growth more balanced, and quality indicators such as fruit taste, color, and nutritional composition are improved. For example, the sugar and vitamin content of fruits may increase, while the nitrate content may decrease, enhancing the market competitiveness of agricultural products.

3、 Introduction to Liaoning Deshen Microbial Technology Co., Ltd

Liaoning Deshen Microbial Technology Co., Ltd. was established in July 2020 and is located in Dongdaihe New District, Liaoning Province. It covers an area of 82.5 acres and has a registered capital of 100 million yuan. As a national high-tech enterprise (high-tech certificate number: GR202221000774) and a young eagle enterprise in Liaoning Province, we focus on the research and production of microbial products.

The company has a standard production plant of 6457.87 square meters, equipped with 29 tertiary liquid high-density fermentation tanks covering different specifications such as 50 tons, 25 tons, 5 tons, 3 tons, 500 liters, and 100 liters. The facilities are complete, and the annual production capacity of microbial agents reaches 100000 tons. It is a leading enterprise in the field of agricultural microbial fermentation in Asia.

At present, the enterprise has successfully developed a series of products suitable for soil improvement, agricultural planting, livestock and poultry breeding, harmless treatment of livestock and poultry manure in aquaculture, water purification and other fields. It practices the purpose of "originating from nature, returning to nature, serving the people, and benefiting the people", adheres to the core concept of "soil improvement, soil restoration, protecting black soil, and ensuring food and food safety", and takes "ensuring national food security, agricultural product quality and safety, and agricultural ecological safety, leaving green mountains and fertile fields for future generations" as its vision, and is committed to contributing to the sustainable development of agriculture.