Performance, body development and ingestive behavior of Nelore and crossbred heifers finished in a grazing system.

Autor: da Silva MV; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., Vedovatto M; Dean Lee Research and Extension Center, Louisiana State University, 8105 Tom Bowman Drive, Alexandria, 71302-9362, USA., Ferraz ALJ; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., Castro MF; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., Gonçalves IP; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., Silva AR; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., Dos Santos Amorim L; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., Hernandes MSP; Faculdade de Medicina Veterinária E Zootecnia, Universidade Federal de Mato Grosso Do Sul, Av. Senador Filinto Muller, 2443, Campo Grande, 79074-460, Brazil., da Silva AF; Faculdade de Medicina Veterinária E Zootecnia, Universidade Federal de Mato Grosso Do Sul, Av. Senador Filinto Muller, 2443, Campo Grande, 79074-460, Brazil., de Oliveira MVM; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil., de Oliveira DM; Universidade Estadual de Mato Grosso do Sul - UEMS, Rodovia Aquidauana, Km 12, Aquidauana, MS, 79200- 000, Brazil. dmo@uems.br.
Jazyk: angličtina
Zdroj: Tropical animal health and production [Trop Anim Health Prod] 2024 Jan 24; Vol. 56 (2), pp. 56. Date of Electronic Publication: 2024 Jan 24.
DOI: 10.1007/s11250-024-03908-0
Abstrakt: The aim of this experiment was to evaluate growth, body development and ingestive behavior of Nelore and crossbred heifers. Twenty-two contemporary heifers (eight Nelore, seven Nelore × Angus (½ Angus) and seven Nelore × Pantaneiro (½ Pantaneiro) crosses) were evaluated. The variables evaluated were weight, subcutaneous fat thickness [assessed by ultrasound in the longissimus dorsi (SFT) and biceps femoris (SFTP8)] morphometric measures and ingestive behavior (determined between 7 am and 5 pm). The daily gain differed between the breeds (P < 0.05), being greater for the ½ Pantaneiro than Nelore and equal to ½ Angus at the end of the study. The ½ Angus heifers differed (P < 0.01) from the other breeds for SFT (4.36 mm), with no difference between Nelore (2.77 mm) and ½ Pantaneiro (3.38 mm). The SFTP8 was greater (P < 0.01) (5.36 mm) in ½ Angus heifers than t others crossbreed, and greater in ½ Pantaneiro than in Nelore (4.28 vs 3.29 mm). The heart girth and rump width between the ilia were larger (P < 0.01) for the ½ Angus than ½ Pantaneiro and Nelore (169 cm; 41.6 cm, respectively). Substernal height was greatest (P < 0.01) for the Nelore (69.1 cm), reflecting the greater anterior and posterior height. The ½ Angus spent the longest time (P < 0.05) walking and less time grazing. Idleness also differed (P < 0.05) throughout the day. Crossbred heifers exhibited better performance and development than Nelore. The grazing pattern of ½ Pantaneiro heifers was identical to Nelore, but walked less, gained more weight, and exhibited better carcass finishing.
(© 2024. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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