Applications of Nitrogen-Fixing Cyanobacteria In Agriculture

Cyanobacterium, also known as cyanobacteria, is the earliest type of prokaryotic microorganisms that can perform photosynthesis on the earth, and nitrogen-fixing cyanobacteria refers to the general name of cyanobacteria with nitrogen-fixing ability.

Nitrogen-fixing cyanobacteria have strong ecological adaptability and can exist in a free state in many environments or form symbionts with certain organisms.

Studies have shown that the average yield of rice inoculated with nitrogen-fixing cyanobacteria increases by more than 15%, with a maximum of 33%.

Nitrogen-fixing cyanobacteria can not only provide nitrogen and organic matter for crops, improve the solubility of phosphate, reduce soil and water pollution, but also supply oxygen to the roots of crops, secrete plant hormones and inhibit the growth of weeds.

Have the effect of maintaining ecological balance and promoting sustainable agricultural development.

nitrogen fixing cyanobacteria

The plant hormones produced by cyanobacteria are mainly auxin and cytokinin. And it has the ability to regulate its L-tryptophan-dependent auxin biosynthesis ability.

When coexisting with plants, nitrogen-fixing cyanobacteria produce more endogenous and exogenous auxins. Therefore, nitrogen-fixing cyanobacteria have the potential to be used directly as biofertilizers and bioregulators in the field.

2. Apply as Bio Fertilizer

Nitrogen fixed by nitrogen-fixing cyanobacteria provides nitrogen to plants through secretion, cell rupture, and degradation, which can promote plant growth and increase yield. Therefore, it has the potential to replace chemical nitrogen fertilizers.

At the same time, nitrogen-fixing cyanobacteria can also improve soil structure and play an important role in absorbing and sequestering a large amount of CO2 to achieve carbon emission reduction and increase soil organic matter.

3. Disease and Pest Resistance

Nitrogen-fixing cyanobacteria produce a wide variety of secondary metabolites for pest & disease control.

In tomato cultivation, cyanobacteria can control the number of Fusarium wilt in the soil and inhibit its migration ability and can increase soil organic carbon and nitrogen, promote the growth of tomato plants, and improve yield and quality.

Increase nitrogen, phosphorus, and zinc content and enhance the activity of enzymes related to disease resistance mechanisms in tomato plants.

Nitrogen-fixing cyanobacteria will usher in a new development opportunity as an ecological and environmentally friendly biological fertilizer.

The agricultural application of nitrogen-fixing cyanobacteria will be more and more in-depth in crop growth regulation, large-scale production, and application of biological fertilizers, pest control, and agricultural pollution control.

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