Evaluación de la producción primaria de una pradera establecida al aplicar diferentes niveles de fertilizantes inorgánicos

Abstract

At the Pacaguan Farm, located in Riobamba Canton, Quimiag Parish, two treatments were analyzed (T1 (40N; 80P; 30K), and T2 (80N; 160P; 60K)), compared to a control treatment (T0 Biol (7,5 liters)), during two consecutive cuts in the primary production of an established pasture of ray grass, alfalfa and white clover. For the analysis of the productive variables, a completely randomized block design was used for the variables that presented significance (P < 0,05), a means separations were performed with the Tukey test. When studying the productive variables during the first evaluation cut, better responses were obtained in the days at the prefloration in the T1 30 days; in the production of green forage the T2 16,69 t/ha/cut; and of the production of dry matter the T2 2,67 t/ha/cut. In the second evaluation cut, better responses were obtained at ray grass height at 15 days of evaluation with T2 23,33 cm; in the days to the prefloration the T2 31 days; the production of green forage in T2 23,07 t/ha/cut, and in the production of dry matter the T2 3,18 t/ha/cut; in the rest of productive variables no differences were reported. The economic evaluation determined that the use of T1, obtained a benefit cost of 1,28; for that reason, it is recommended to stablish a pasture of alfalfa, ray grass and white clover in the Pacaguan Farm, with the application of T1, as it obtained higher yields of green matter and the cost benefit is the highest