Composi o corporal, exig那ncias em prote赤na e energia para ganho de peso de caprinos em pastejo = Body composition, protein and energy requirements for weight gain of boer mixed-breed goat kids on pasture

作者：Giovanna Henriques da Nobrega; Aderbal Marcos de Azevedo Silva; Jose Morais Pereira Filho; Solange Absalo Azevedo

来源：Acta Scientiarum - Animal Sciences, 2008.

• Capra hircus
• energia metabolizavel
• exigencia liquida
• proteina metabolizavel
• semiarido
• Capra hircus
• metabolizable energy
• net requirement
• metabolizable protein
• semi-arid

Objetivou-se com este trabalho estimar a composi o corporal e as exig那ncias nutricionais em prote赤na e energia para ganho de peso de cabritos Boer SRD, na fase de crescimento, em pastejo na regi o semi芍rida. O experimento foi desenvolvido na fazenda＆Nupe芍rido＊, no munic赤pio de Patos, Para赤ba. Foram utilizados 24 cabritos com peso corporal m谷dio inicial de 15 kg, em pastejo, distribu赤dos em quatro tratamentos com n赤veis crescentes de suplementa o concentrada (0; 0,5; 1,0 e 1,5% do peso corporal). Os animais, mantidos em sistema de semiconfinamento, receberam suplementa o alimentar, em baias individuais, ao serem recolhidos diariamente. Quando um dos animais de cada grupo atingia 30 kg de peso corporal, todos os demais animais do grupo eram abatidos ap車s jejum de 16h. A composi o corporal variou de 185,3 a 184,0 g de prote赤na; 53,0 a 120,2 g de gordura e 1.642 a 2.356 kcal kg-1 de corpo vazio. As exig那ncias l赤quidas em prote赤na e energiavariaram de 146 a 145 mg e 1,92 a 2,75 kcal g-1 de ganho, respectivamente, para animais de 15 a 30 kg de peso corporal. The objective of this work was to estimate the body composition and the nutritional requirements in protein and energy for the weight gain of Boer and Mixed-breed goat kids, during growth phase, on pasture in the semi-arid region. The work was developed at ＆Nupe芍rido＊ farm, in Patos- PB. Twenty-four goat kids were used, with average initial body weigh of 15 kg, distributed into four treatments with increasing levels of concentrate supplementation (0, 0.5, 1.0 and 1.5% of body weight). The animals, maintained under semiconfinement system, received feeding supplementation in individual stalls when they were gathered daily. Whenever one of theanimals of each group reached 30 kg of body weigh, all other animals of the group were slaughtered after a 16-hour fast. The body composition varied from 185.3 to 184.0 g of protein; 53.0 to 120.2 g of fat and 1,642 to 2,356 kcal kg-1 of empty body. The net requirements in protein and energy on growing varied from 146 to 145 mg and 1.92 to 2.75 kcal g-1 of gain, respectively, for animals from 15 to 30 kg of body weigh.