Optimización de agua de riego en alfalfa (Medicago sativa L.) utilizando sensores de humedad en el suelo

Abstract

The goal of this study was evaluation of three soil moisture levels measured with electronic sensors in alfalfa crops (T1 = 5-15 cbar, T2 = 50-75 cbar and T3 90-110 cbar), previously calibrated for the study area. Variables such as dry matter yield (DM) and irrigation water productivity (PA) were valuated. The values obtained were 6.65 6.35 at 5.27 t ha-1 for DM and 2.67 4.02 at 3.87 kg m-3 for PA as a function of crop Evapotranspiration (ETc ) With values of 248.64, 157.96 and 136.30 mm for T1, T2 and T3 respectively. These results allow us to conclude that keeping the soil moisture tension at 50-75 cbar, i.e. 21% ± 2.3% of soil humidity, the highest water productivity in the crop can be reached.