Alternatives of utilization of winter pasture for rearing of beef heifers

Revista Brasileira de Zootecnia

Montagner, Denise Baptaglin³  Santos, Davi Teixeira dos³  Rocha, Marta Gomes da³  Pilau, Alcides³  Restle, João³  Freitas, Fabiana Kellermann de³  Neves, Fábio Pereira¹  Frizzo, Adriana² 

[1] Universidade Federal do Rio Grande do Sul;Universidade Federal de Santa Maria, Santa Maria

关键词: /font> oat;    Italian ryegrass;    nitrogen;    supplementation;    arrowleaf clover    Introdução No Rio Grande do Sul;    a maioria das fêmeas bovinas atinge a puberdade em idade avançada;    sendo acasaladas aos três anos de idade e produzindo sua primeira cria aos quatro anos (Restle et al;   

DOI  :  10.1590/S1516-35982003000200017

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The experiment aimed to evaluate animal performance and economic return in oats (Avena strigosa Schreb) plus Italian ryegrass (Lolium multiflorum Lam) pasture subjected at three systems of utilization. The treatments used were: 1. pasture of oat + Italian ryegrass + 300 kg/ha of nitrogen-'Nitrogen'; 2. pasture of oat + Italian ryegrass + supplementation-'Supplement' and 3. pasture of oat + Italian ryegrass + arrowleaf clover-'Clover'. The experimental animals were ninety-four beef heifers of Charolais breed and Charolais-Nellore crosses, with initial weight and age of 197 kg and nine months, respectively. The continuous grazing method with variable stocking rate was used. The supplement utilized was ground sorghum, at quantity of 1% of live weight (LW). The score of body condition (BC), average daily gain (ADG), stocking rate (SR), live weight gain per ha (LWG) and economic return (ER) from treatments were evaluated. The greater BC, SR and LWG were obtained on 'Supplement', with values of 3.5, 1360.1 kg of LW/ha and 602.8 kg of LW/ha, respectively. The total cost and net income per treatment were R$ 687.15 and 194.28; 881.49 and 113.13; 574.69 and 226.22 for 'Nitrogen', 'Supplement' and 'Clover', respectively. The treatment 'Clover' presented the best ratio, with return of R$ 1.39 for each one real invested. In biological values, utilization of oat and ryegrass pasture for beef heifers, without impairment of ADG, greater stocking rate and production per area are obtained using energy supplementation.

【 授权许可】

CC BY-NC