Bacillus subtilis advantages in agriculture
Bacillus subtilis is important for plant growth in many ways. It can produce heat-resistant and stress-resistant spores. And can be made into various dosage forms. We can mix it with chemical pesticides without inactivation, and the mass production process is simple, the cost is low, and the application is convenient and storage.
Benefits of Bacillus subtilis
1. Nutrition and space competition
The competitive effects of Bacillus subtilis mainly include nutritional competition and spatial locus competition. It can rapidly and massively multiply and colonize in the rhizosphere, body surface, and the soil, effectively rejects, prevent and interfere with the colonization and infection of plant pathogenic microorganisms on plants, thereby achieving antibacterial and disease-preventing effects.
2. Produce antibacterial substances
Bacillus subtilis can produce a variety of materials with antibacterial and bacteriostatic activities during the growth process, such as subtilin, organic acids, antibacterial proteins, etc. These substances can inhibit the growth and reproduction of pathogenic bacteria and even destroy the bacterial structure and kill Pathogens. Therefore, Bacillus subtilis has a good effect on the prevention and treatment of diseases such as double rot, root rot, and gray mold.
3. Stimulate the crop’s immune system and growth
Bacillus subtilis can secrete active substances, activate plant defense systems, enhance crop immunity and disease resistance, and reduce or eliminate the harm of pathogenic bacteria to plants. It can also promote the growth and development of a variety of plant seeds, seedlings, roots, and enhance the disease resistance of plants, thereby indirectly reducing the occurrence of diseases. For example, Bacillus subtilis increase the formation of auxin (IAA, IBA), stimulates crop roots development, and enhances photosynthesis.
At the same time, it converts materials that are difficult to absorb in the soil into materials that are easily absorbed by crops, promotes the absorption and utilization of nutrients by crops, and improves the utilization rate of fertilizers.
4. Induce plant resistances to diseases
Bacillus subtilis not only directly inhibits plant pathogenic bacteria but also enhances plant disease resistance by inducing the plant’s disease resistance potential. For example, B. subtilis, a biocontrol agent against rice sheath blight, can influence the activity of enzymes (POD, PPO & SOD) related to disease resistance of rice leaf sheath cells, and achieve disease resistance.