Performance and carcass characteristics of beef cattle fed with ammoniated marandugrass hay

Revista Brasileira de Zootecnia

Marcella De Toledo Piza Roth²  Flávio Dutra De Resende¹  Ricardo Andrade Reis¹  Gustavo Rezende Siqueira¹  Marcelo Henrique De Faria¹  Telma Teresinha Berchielli¹ 

[1] ,UNESP Programa de Pós-Graduação em Zootecnia

关键词: ammoniation;    animal performance;    carcass characteristics;    chemical treatment;    forage quality;    haymaking;    acabamento de carcaça;    amonização;    desempenho animal;    fenação;    rendimento de carcaça;    tratamento químico;   

DOI  :  10.1590/S1516-35982009000900030

来源: SciELO

【 摘 要 】

This trial was conducted aiming to evaluate the effects of Brachiaria brizantha vegetative seed harvest residues hay treated with anhydrous ammonia (NH3) or urea, and protein sources on the steers performance, and carcass quality. Twenty-four male beef cattle were (12 F1 Nellore X Aberdeen Angus and 12 F1 Nellore X Red Angus), distributed in four treatments, with six replications. Animal crossbreed type and initial body weight were considered blocks. The diets were: Untreated hay supplemented with non-protein nitrogen (UHNPN); untreated hay supplemented with cottonseed meal (UHCM), hay treated with 5% urea (HTU), hay treated with 3% anhydrous ammonia (HTA) of DM%. Diets were formulated to be isoproteic and isoenergetic. The initial body weight (kg), daily DM intake (kg), and percentage of body weight (% BW) did not differ among treatments, and the average values observed were 422.6 kg, 10.24 kg, and 2.16% BW, respectively. Animals fed with HTA showed better daily weight gain, feed efficiency, 1.336 kg/day, and 7.78 kg/kg of weight gain, followed by the UHCM, 1.161 kg/day, and 8.98 kg/kg, respectively. Animals of the HTA showed highest NDF, ADF and cellulose intake. Carcass fat thickness was highest on the HTA animals, 6.3 mm.

【 授权许可】

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