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Candido, Ebson Pereira; Santos, Edson Mauro; Ramos, Joao Paulo de Farias; de Oliveira, Juliana Silva; Pinho, Ricardo Ma; Perazzo, Alexandre Fernandes; Ramos, Rosangela Claurenia da Silva; de Freitas, Poliane Meire Dias
Ciência rural, 01/2015, Volume: 45, Issue: 1Journal Article
This study aimed to evaluate the economic result of the termination of feedlot sheep fed silages with different cultivars of sorghum 'BRS 810' and 'BRS Ponta Negra' (forage); 'BRS 610' (dual purpose character) and 'BRS 655' and 'BRS 800' (character grain). Five lambs without defined breed were used, aged between 5 and 7 months, with average weight of 17.7 + or - 3.7kg. The animals were confined in individual cages for 42 days and slaughtered at an average weight of 26.24kg. A completely randomized design was used with five treatments (silage of different cultivars of sorghum) and seven repetitions. The forage: concentrate ratio was 48:52 (DM basis) for all diets. The average cost of silage was 63.71, 71.01, 78.99, 61.08 and 63.35 R$ t.sup.-1 for 'BRS 610', 'BRS 655', 'BRS 800', 'BRS 810'and 'BRSPonta Negra', respectively promoting a net earnings of 78.34, 78.98, 77.43, 82.23 and 80.57 R$ carcass-1. The silage production using the 'BRS 810' with forage purpose has lower production costs and higher net income for carcass. Furthermore higher dry matter production per hectare provided increased support of forage cultivated areas capacity, which allowed greater amount of confined animals. Key words: production cost, semiarid, Sorghum bicolor. Objetivou-se com este estudo avaliar o resultado economico da terminacao de ovinos em confinamento, alimentados com silagens de diferentes cultivares de sorgo: 'BRS 810' e 'BRS Ponta Negra' (carater forrageiro); 'BRS 610' (carater duplo proposito); e 'BRS 655' e 'BRS 800' (carater granifero). Utilizaram-se 35 cordeiros, sem padrao racial definido, com idade entre 5 e 7 meses e com peso vivo medio de 17,7 + or - 3,7kg. Os animais foram mantidos confinados em gaiolas individuais durante 42 dias, sendo abatidos com peso medio de 26,24kg. Utilizou-se um delineamento inteiramente casualizado, com cinco tratamentos (silagem de diferentes cultivares de sorgo) e sete repeticoes. A relacao volumoso:concentrado foi de 48:52 (com base na MS), para todas as dietas testadas. O custo medio das silagens foi de 63,71; 71,01; 78,99; 61,08 e 63,35 R$ t.sup.-1 para as cultivares 'BRS 610', 'BRS 655', 'BRS 800', 'BRS 810' e 'BRS Ponta Negra', respectivamente, promovendo uma receita liquida de 78,34; 78,98; 77,43; 82,23 e 80,57R$ carcaca.sup.-1. A producao de silagem utilizando a variedade 'BRS810'com carater forrageiro apresenta menor custo de producao e maior receita liquida por carcaca, alem de maior producao de materia seca por hectare, proporcionando aumentar a capacidade de suporte forrageiro das areas cultivadas, permitindo confinar maior quantidade de animais. Palavras-chave: custo de producao, semiarido, Sorghum bicolor.
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