The research of influence of ecosystem stream of CO2 in vegetable fields on the mass of the biomass grown-up in aqua model of FAO

The process of evaporation (transpiration) of plants happens throughout all life of plants by day and night. During the day plants both absorb CO2 for photosynthesis and release it by means of evaporation. It should be noted that the role of CO2 in the development of plants is most fully shown in the course of production of biomass. The specifics of influence of atmospheric concentration of CO2 on plants growth are that between top layer of the earth and lower layer of the troposphere there are always CO2 streams. In vegetation zone these streams are caused by such factors as microbial activity in the earth, the inhalation by CO2 plants for photosynthesis, generation by plants of CO2 and O2 in day time and also CO2 at night. The purpose of researches is the creation of the model allowing to carry out the processing of the results of concentra-tion of CO2 measurement in close proximity of the zone of plants growth by the exception of the errors arising because of above ecosystem streams of CO2, and also the calibration of the field measuring instrument of concentration of CO2 directly near the field of plants using regional reference measuring instrument. The problem of exact determination of concentration of CO2 over vegetable fields that is necessary for taking note of CO2 on the mass of the grown-up biomass according to the FAO "Aqua Crop" model is formulated and decided. The proce-dure of calibration of DOAS measuring instrument which is carrying out measurement of concentration of CO2 in close proximity to vegetable fields taking into account ecosystem streams of CO2 is offered. The optimizing task allowing considering tempera-ture dependence of ecosystem streams of CO2 at calibration of the measuring instrument is formulat-ed and solved. Keywords: biomass, modeling, ecosystem stream, vegetation, optimization.