Ciência Animal Brasileira (Jul 2009)
INGESTIVE BEHAVIOR OF GOATS IN RYEGRASS AND BLACK OAT PASTURES IN PURE OR MIXTURE CULTURE COMPORTAMENTO INGESTIVO DE CAPRINOS EM PASTAGEM DE AZEVÉM E AVEIA PRETA EM CULTIVO PURO E CONSORCIADO
Abstract
The experiment was realized in Campo Largo, PR, where the ingestive behavior of goats was evaluated under ryegrass (Lolium multiflorum Lam.) and black oat (Avena strigosa Schreb) pastures in pure or mixture culture, in the period of 04/07/2004 to 05/08/2004. The grasses were applied in poles of 630 m² each, and the experimental design was placed in randomized blocks with three treatments and three repetitions. Twelve female goats were distributed in three experimental poles with four goats each for grazing evaluations. Previously to the evaluations of the animals the measurements of the pasture were obtained, which included height, total mass of forage and of the compounds leaf and steam. The goats were evaluated by preference and ingestion rate. The averages of pastures height was higher (p>0.05) in ryegrass and mixture, and in other pastures evaluations ryegrass was superior (p<0.05) to the others treatments. The grazing time of goats in ryegrass and black oat was superior (p<0.05) to the mixture. The bite rate per minute was higher (p<0.05) in black oat. The goats demonstrated preference for ryegrass and black oat in pure culture.<br /> <br />KEY WORDS: Avena strigosa Schreb, bite, goats, Lolium multiflorum Lam, preference. The experiment was realized in Campo Largo – PR, where the ingestive behavior of goats was evaluated under ryegrass (Lolium multiflorum Lam.) and black oat (Avena strigosa Schreb) pastures in pure or mixture culture, in the period of 04/07/2004 to 05/08/2004. The grasses were applied in poles of 630 m² each, and the experimental design was placed in randomized blocks with three treatments and three repetitions. Twelve female goats were distributed in three experimental poles with four goats each for grazing evaluations. Previously to the evaluations of the animals the measurements of the pasture were obtained, which included height, total mass of forage and of the compounds leaf and steam. The goats were evaluated by preference and ingestion rate. The averages of pastures height was higher (p>0.05) in ryegrass and mixture, and in other pastures evaluations ryegrass was superior (p<0.05) to the others treatments. The grazing time of goats in ryegrass and black oat was superior (p<0.05) to the mixture. The bite rate per minute was higher (p<0.05) in black oat. The goats demonstrated preference for ryegrass and black oat in pure culture. O experimento foi realizado em Campo Largo, PR, para avaliação do comportamento ingestivo de caprinos diante das espécies forrageiras azevém e aveia-preta em cultivo puro e consorciado, no período de 4 julho a 5 de agosto de 2004. As forrageiras foram aplicadas em piquetes com 630 m2 cada, alocadas em um delineamento experimental em blocos ao acaso com três tratamentos e três repetições. Nas avaliações de pastejo utilizaram-se doze cabras, distribuídas em três piquetes experimentais com quatro animais cada. Previamente às avaliações de pastejo, procedeu-se a medições na pastagem, como altura, massa total de forragem e dos componentes lâmina foliar e colmo com bainha. Fez-se a avaliação dos animais pela preferência e velocidade de ingestão. Os tratamentos azevém e consorciado mostraram-se superiores (p<0,05) à aveia-preta na altura média da pastagem, sendo que nas demais avaliações da pastagem o azevém foi superior (p<0,05) aos demais tratamentos. O tempo de pastejo dos caprinos no tratamento azevém e aveia-preta foi superior (p<0,05) ao consorciado. A taxa de bocados por minuto foi maior (p<0,05) no tratamento aveia-preta. Os caprinos apresentaram preferência pelos tratamentos azevém e aveia-preta em cultivo puro. <br /><br />PALAVRAS-CHAVES: Avena strigosa Schreb, bocado, caprinos, Lolium multiflorum Lam, preferência.
