Modelo de aptitud agroecológica como herramienta de manejo sustentable del predio agrícola / Amodel of agroecological aptitude as a sustainable management tool of agricultural predio

摘要

The sustainable management of an agricultural property requires knowledge of a large number of soil and environmental parameters. The objective of this work was to create a model of agroecological aptitude that allows to establish a sustainable management of the soils at agricultural level, for which a work was carried out in the Héctor farm, Guanare municipality, Portuguesa state. To avoid that the large number of parameters originate a model of low predictive power, high overfitting and existence of multicollinearity, they were integrated into productivity indices (IP), erosion (IRE), fragility (IFS) and resilience (IRS). The results allowed obtaining the additive linear model: MAAT = IP + IFS + IRS - IRE with R 2 = 0.973 and the predictive models COAAT1 = 0.31991 + 1.66878 (MAAT) with R 2 = 0.6703 and COAAT2 = 0.12462 +1.73377 (IFS) +2.29413 (IP) +1,60098 (IRS) -0.1820 (IRE) with R 2 = 0.6687. It was found that in the high sector the variation of this condition went from 0.99 (moderate) to 0.45 (very low) with a decrease of 0.54 in its condition of agroecological aptitude. On the other hand, according to the ACP, organic matter, drainage potential, drainage, slope effect, percentages of sand, clay and texture of the subsurface horizon are the parameters to be managed to achieve the agroecological aptitude of the agricultural land.