Irradiation techniques in the production of biological protein preparations

Protein is the most important nutrient for plants. Their content in soil is very low, so plants often lack nitrogen. One of the most popular methods of increasing soil nitrogen is using nitrogen-fixing microorganisms from the air.

Microbiological fixation of nitrogen fertilizer applications in plants

In soil environments, microorganisms participate in the conversion of organic matter, fix nitrogen-rich nitrogen for soil, accumulate in the soil auxin stimulates plant growth, synthesizes vitamins thyamine, nicotinic and biotin . Irradiation techniques create different types of substrates capable of fixing nitrogen fixing bacteria and microbial products to apply to the care of some popular plants in Dalat that are being applied. use.

Some products such as denatured starch, C-graft-AAm, C-graft-AAc have been studied with the characteristics of water retention, fertilizer retention . to be artificial sources to maintain the activity and breeding staff. Microbial biomass avoids adverse effects on their life during storage, storage or when used directly on fertilizers and soil.

Currently, scientists have identified a number of species of bacteria that can fix nitrogen such as Rhizobium, Beijerinskii, Clostridium and Azotobacter.

Da Lat Nuclear Research Institute selected the research object as Azotobacter bacteria. Azotobacter has no ability to assimilate humus. They are only capable of thriving in soils that contain a lot of easily assimilated organic matter. Azotobacter very well assimilates cellulose degradation products.

Master Nguyen Duy Grade, Department of Radiation Technology - Da Lat Nuclear Research Institute said: One of the important criteria of materials to absorb microorganisms is the ability to water of such materials. The permeability of the graft material has an important role in the absorption and maintenance of bacterial activity. The dose of irradiation also affects the degree of water expansion of the grafted material (Cg-AAm). At a high dose, the water level decreases. The water level of these substrates is from 59 to 98 times.

An important characteristic of agricultural microbial absorbing materials is their ability to biodegrade, which does not contaminate the soil environment. Test results in the field in Lam Dong showed that C - grafting - AAm has the ability to decompose strongly in soil environment. Under the effect of microorganisms and fungi in soil, C - g - AAm decomposes into smaller molecules (CO ₂ , H ₂ O). After 20 days, the hydrogel material lost 52% of its weight. The reason for the decomposition is so fast because C is a biological polymer, easily decomposed by the soil microorganism that leads to strong cutting C - grafting - AAm.

When investigating the effect of biological nitrogen fixation on growth and development of choysum and mulberry, Azotobacter inoculants also have a clear effect on growth and development. of the tree compared to the control plot.