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Productive indicators and quality of Andropogon gayanus

Abstract:

Plains grass is a robust and useful forage grass of African origin, very persistent and a wide range of adaptation to edaphoclimatic conditions. The present investigation was carried out in the months of July-September 2015, on a farm, located at Km one of the El Empalme-Balzar road, province of Guayas, Ecuador. With the objective to evaluate the effect of regrowth age on the performance and quality components of Andropogon gayanus. A randomized block experimental design with three treatments (21, 42 and 63 days) and four repetitions was used. To do this, were used parcels of six square meters (3x2), with a sowing frame of 0,50 x 0,20 m, the response variables were the GMY, DMY, fiber-nitrogen ratio and leaf-stem; as well as DM, CP, CF, EE, ash and NFE. The best results were obtained at 63 d in how many productivity indicators with 8.42; 2.66 t of green and dry matter, respectively; while the nutrient content decreased with the increase in the study period, with the increase in the CF / N ratio (12.84) and decrease in L / S (4.47). It was concluded that maturity exerts a positive effect on the yield and the morphological indicators when increasing them, and negative on the quality when decreasing the nutrients.