Efecto de diferentes niveles de micorriza más la adición de una bases estándar de humus en la producción primaria forrajera de la Setaria aphacelata (Pasto miel)

Abstract

In the farm of the Municipal DAG El Chaco, it was performed a study of three levels of mycorrhiza (4,5,6 kg-1ha-1 ), plus the addition of a humus standard base (8 tn-1 ha-1), and a witness, in the production of Setaria sphacelata in two consecutive cuts. The research had an area of 480 m², set in 16 experimental units, made of 30 m² (6x5 meters), and four repetitions; which were evaluated under a Design of Random Blocks (DRB). The best productive parameters in the first and second evaluation were when including 6 kg-1ha-1 of mycorrhiza + 8 tn-1 ha-1 of humus (T3), reaching a pre flowering time of 44,50 days; height 80,50 cm; base cover 60,24% and air cover 70,11%, production of green forage and dry matter 20,19 and 2,21 tn-1 ha-1 cut-1 in its order, on the second evaluation it was registered 38,50 days of pre flowering height 80,00 cm; base cover 70,59 % and air cover 83,24%, g reen forage 20,35 and dry matter 2,58 tn-1 ha-1 cut-1. Based on the initial and final soil analysis, there was an increase of P (8,3 to 46,37 ppm), K (0,09 to 0,58 meq/100ml), S (5,14 to 55,7 ppm), as well as light decrease in the pH (5,63 to 5,50). Regarding the bromatological analysis, treatment (T3) was the one which showed the best characteristics on its level of protein and fiber with 14,57% and 27,55%. The economic analysis (T3) reported the best B/C, with 1,62 and 1,89 on the firts and second cut. For instance, it is recommended to use treatment (T3) since it reaches the best productive performance.