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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 25, No. 3, 2007, pp. 229-232
Bioline Code: zt07034
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 25, No. 3, 2007, pp. 229-232

 es Uso de Andropogon gayanus check for this species in other resources bajo diferentes cargas animales, en una sabana eólica del Capanaparo, estado Apure, Venezuela
Torres, René; Aparicio, Rafael; Astudillo, Luís & García, Espedito

Resumen

A objeto de evaluar Andropogon gayanus check for this species in other resources con animales jóvenes en dos épocas del año, bajo las condiciones de las sabanas del Capanaparo, entre agosto 1990 y mayo 1992, se realizo un experimento en la Finca Las Mercedes, Municipio Achaguas del estado Apure, sobre cinco potreros los cuales fueron cargados con 0,5 (baja); 1,0 (media) y 1,3 UA/ha (alta), respectivamente. Las cargas en todos los casos fueron establecidas con tres mautas indicadoras de peso y un maute pastoreador, el cual fue retirado posteriormente para el ajuste de carga animal; a las cuales les fue tomada estimaciones del peso cada dos meses. En igual frecuencia se realizaron mediciones de producción de biomasa/potrero, cobertura y altura de la pastura, y establecimiento de tenores de proteína cruda, fósforo, calcio, magnesio, cobre y zinc. Las mayores ofertas de MS fueron obtenidos en la época de lluvia en comparación a la de sequía, 11 y 9 t MS/ha/año, respectivamente. Los contenidos PC fueron 53% mayor en la época de lluvia (6,45%) que en la época de sequía (3,05%). Los tenores de Ca, Mg y Cu en las dos épocas estuvieron dentro de los límites normales y solamente las concentraciones de P y Zn estuvieron por debajo del nivel crítico. La carga baja obtuvo la mejor respuesta animal con 836 g/anim/d, en relación a las cargas media y alta (613 y 652 g/anim/d) en la época de lluvia.

Palabras-clave
Andropogon gayanus, sabana eólica, pastoreo continuo.

 
 en Use of Andropogon gayanus check for this species in other resources with different stocking range in an eolic savanna of Capanaparo, Apure state, Venezuela
Torres, René; Aparicio, Rafael; Astudillo, Luís & García, Espedito

Abstract

To evaluate Andropogon gayanus check for this species in other resources with young animals in two seasons of the year, under the conditions of the savanna of the Capanaparo, between August 1990 and May 1992, it was done an experiment in the ranch the Mercedes, Achaguas Municipality, Apure state, on five paddocks which were loaded by 0.5 (low), 1.0 (average), and 1.5 (high) AU/ha, respectively. Stocking rates in all the cases were established by three heifers indicatives of weight and a young bull grazing, which was withdrawn later to adjust the rates, to which it was taken estimations of the weight every two months. In equal frequency there were realized measurements of production of biomass by paddock, coverage, and height of the pasture, and establishment of tenors of crude protein, phosphorus, calcium, magnesium, copper, and zinc. The highest DM offer was obtained in the rainy season compared to drought, 11 and 9 t DM/ha/year, respectively. The PC contents were 53% higher in the rainy season (6.45%) than in the drought season (3.05%). The tenors of Ca, Mg, and Cu in both seasons were within the normal limits and only the P and Zn concentrations were below the critical level. The low stocking rate had the best animal response with 836 g/anim/d in relation to the average and high rates (613, and 652 g/anim/d) in the rainy season.

Keywords
Andropogon gayanus, eolic savanna, continuous grazing.

 
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