THE EFFECT OF DEHYDRATION ON THE BIOMASS AND TITER OF TRICHODERMA FUNGI

Trichodermin-KZ biofertilizer; Biomass of the Trichoderma fungus; growth activity; temperature regime; substrate nutrient medium; titre.

Abstract

The optimal drying temperature was determined to obtain the biofertilizer Trichodermin-KZ, on the basis of strains of fungi of the genus Trichoderma, in the microbiology laboratory of the Department of Soil Science and Agrochemistry of the Kazakh Agrotechnical University named after S. Seifullin for 60 days. In the field of plant protection, fungi belonging to the genus Trichoderma are widely used as a biological agent to combat pathogens. The main parameters like titer and biomass of biofertilizer based on trichodermal fungi in liquid, dry, paste-like types, must be checked on the creating stage. The article conducted a comparative study of different temperature conditions of drying biomass of the Trichoderma fungus. It is shown that different temperature regimes affect the mass of the biofertilizer and its titer. In this research, it was found that the temperature and duration of drying strongly affect the growth and spore formation of Trichoderma mycelium. It was noted that drying trichoderm biomass at a temperature of 30°C even for up to 30 minutes, the titer of the biofertilizer is high, radial growth of the mycelium is provided. Dehydration at a temperature of 35-43°C for 20 25 minutes allows sufficient development of mycelium,obtaining high-titer biomass. It has a positive effect on the extraction process and does not lead to changes in the fungicidal characteristics of the biofertilizer after drying and is the most optimal according to the results of the study. As a result of mathematical processing of the obtained results, a correlation relationship between the biomass titer and the drying temperature was established. It was found that the higher the drying temperature and time interval, the lower the biomass titer.