THE INFLUENCE OF SOIL FERTILIZATION AND MAINTENANCE UPON THE ENERGYCONSUMPTION REQUESTED BY GRAPES PRODUCTION
Abstract
Transformation of solar energy into chemical energy by means of vegetal organisms has always represented one of the most important preoccupations of the contemporary world. The possibility to rise the light energy conversion coefficient into chemical energy depends on plant endogenous factors, represented by plant genetic abilities to biochemically assimilate CO2 as complex organic compounds using solar energy , on the one hand, and on exogenous factors as well (light, temperature, air CO2 content, humidity, soil mineral substances supply required by plant nutrition). The bioenergetical interpretation concerning the effect of fertilizers used in plant cultivation refers to a survey that studies the fossil energy consumption required by getting and applying chemical or natural organic fertilizers, on the one hand, and to the light energy stored in the main product which represents an extra cropping as a result of fertilization (Gh. Lixandru & Colab, 1980).
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