In the study comparative research of water sys-tem «seaweed - yeast», closed on gas, and land system «a plant - rizosphere microorganisms» was carried out at the raised content of carbon dioxide in the atmosphere in vitro. As an autotrophic link green microseaweed of Chlorella vulgaris and as a geterotrophic link - Candida utilis and Candida guilliermondii yeast were used. The cultivation of a hlorella and yeast was carried out in the separate fermenters closed among them on gas. The chan-nel of air was carried out by means of the compres-sor; the illumination was from fluorescent lamps. Triticum aestivum wheat was grown up in tight chambers at normal (0.03 %) and raised (0.06 %) content of carbon dioxide. Chambers within 28 days were blown by air from gas-holders. The car-bon dioxide content was controlled by a gas ana-lyzer. The temperature was maintained by about 20-23°C. Plants were lit with luminescent lamps for 24 hours. Sterile seeds of wheat were inoculated with rizosphere bacteria of Pseudomonas putida. Then seeds were couched for two days in Petri's cups and sterilely sowed in vegetative vessels. As a sterile river sand watered with Knopp's circle substratum was used. It was shown that «an auto-troph - geterotroph» at short circuit on gas of a hlorella and one type of yeast their biomass in-creased in water system in comparison with bio-mass at cultivation without short circuit. The in-crease in the carbon dioxide content was due to the use of a heterotrophic link of two types of yeast leaded to increase in biomass of a hlorella to 3.4 g/l. The research of land system "a plant - rizosphere microorganisms" at increase of carbon dioxide in the atmosphere to 0.06 % showed that biomass of wheat and bacteria on roots of plants also increased.
water and land ecosystems, hlorella, yeast, wheat, rizosphere microorganisms, carbon dioxide
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