Comparison of Diet Evaluation Systems for Cattle in an Intensive Beef Production Model: Feedlot of Young Bulls

Revista Brasileira de Zootecnia

Brito, Rodolfo Marques de¹  Carvalho, Ricardo de Moraes¹  Sampaio, Alexandre Amstalden Moraes¹ 

[1]niversidade Estadual Paulista, Jaboticabal

关键词: beef cattle;    corn silage;    cottonseed meal;    requirements;    soybean meal     IntroduçãoNo Brasil;    o confinamento de bovinos para corte é uma das técnicas mais utilizadas dentro da cadeia de produção da carne bovina;    que;    por sua vez;    desempenha importante papel no processo de desenvolvimento socioeconômico;    como supridora de alimento nobre para a população;    matéria-prima para a indústria e na geração de divisas por meio das exportações (Martin;    1987);   

DOI  :  10.1590/S1516-35982002000100018

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- Thirty ¾ Canchim + ¼ Nelore young bulls with 417 kg of body weight and 15 months of age, were confined during 84 days. The animals were fed with diets composed with corn silage, corn grain, cottonseed meal, soybean meal, whole soybean and mineral mix, adjusted in agreement with the recommendations of the Metabolizable Protein System (MP), Cornell Net Carbohydrate and Protein System (CNCPS) and Intestine Digestible Protein System (PDI), for predicted body weight gain of 1.3 kg/head/day. The daily body weight gain did not differ among treatments CNCPS, MP and PDI, with 1.51; 1.48; and 1.13 kg/head, respectively. The economic analysis revealed net profit of R$116.25; R$148.30; and R$108.51/head for CNCPS, MP and PDI systems, respectively. The diets adjusted by CNCPS and MP systems provided superior animal performance than that expected, while the diet adjusted by PDI system did not allow the predicted body weight gain.

【 授权许可】

CC BY-NC