Balance de agua y energía de los cultivos en la cuenca del arroyo Ludueña, Argentina

Abstract

S. Montico, B.A. Bonel, N. Di Leo, M.S. Vilche and J. Denoia. 2006. Water and energy balance of crops in the basin of Ludueña stream, Argentina. Cien. Inv. Agr. 33(3):225-236. The nature of the energy sources and the energy fl ows link the different geographical scales, from parcel to territorial levels, being the water a dynamic resource which establish the greater differences. The space analysis of the distribution of the energy and hydrological components, linked with the agricultural productive events, represents an approach that contributes to defi ning guidelines for territorial ordering. The objective of this work was to establish relationships between the balances of energy and the water in units of landscape of a rural basin. The best energy output/input ratio and the most effi cient use of energy was produced in a landscape unit that was less restrictive to productivity. Corn had the greatest energy balance, a situation opposite to that of wheat. Through classifi cation by fuzzy logic, 16 cells were determined with different simplifi ed water balance (BAS). The greatest energy balance (EB) was found to correspond to the smallest BAS. The homogeneous units of water and energy balance that have smaller BAS and larger EB were located mainly in the sectors of the basin’s head; and in the depressed sectors of discharge those with bigger BAS and smaller EB. A georeferenced link between the water and energy balance in a plain basin was established, resulting of utility for the opportune planning of territorial ordering. Key words: Basin, balance of water, balance of energy, territorial ordering.