ISSN 1995-5537
"Biotechnology" journal V. 5, No. 1, 2012
Р. 86-91, Bibliography 10, Russian.
Universal Decimal classification: 582.6/.9:628.35
KINETICS OF SUBSTRATE-DEPENDENT GROWTH OF WATER HYACINTH Eichornia crassipes (Martius.)
Institute of Biology of the Southern Seas of National Academy of Sciences of Ukraine, Sevastopol
Kinetics of substrate-dependent growth of water hyacinth Eichornia crassipes (Martius.) during the growth its on agricultural waste-water under unsteady conditions accumulation mode of cultivation has been investigated. It is established that mineral uptake of substrate from the medium by water hyacinth and its mass growth — two interrelated processes. The connecting link is the accumulation and use of mineral nutrients by plants. Model of water hyacinth growth kinetics has been developed. Using a numerical method for solving of three differential equations systems, the concentrations of nutrients in the food plant mass has been identified. The first equation describes the dynamics of mineral elements concentrations in the environment, the second — the balance of its concentration in the bulk and the third — the dynamics of accumulation of plant mass. Minimum concentrations of nitrogen and phosphorus in the nutrient medium has been calculated, the absorption other elements by water hyacinth below its values are impossible. It is established that the dependence of specific input rate of nutrient in the plant from its concentration in the nutrient medium is almost directly proportional. Model coefficients and initial conditions of the experiment have been determined.
Key words: water hyacinth, sewages, biogen elements, kinetics of growth.
© Palladin Institute of Biochemistry of National Academy of Sciences of Ukraine, 2008