Effects of extruded urea levels on the productive performance and carcass and meat characteristics of Nellore cattle

Ítavo, Luís Carlos Vinhas; Ítavo, Camila Celeste Brandão Ferreira; de Nadai Bonin Gomes, Marina; Longhini, Vanessa Zirondi; dos Santos Difante, Gelson; Dias, Alexandre Menezes; de Souza Leal, Eduardo; da Silva, Manoel Gustavo Paranhos; da Silva, Ana Hellen; da Silva, Laura Beatriz Perez; Paro, Rafael Goes Cardoso; de Araújo, Marcos Jácome; Silva, Tairon Pannunzio Dias; Gurgel, Antonio Leandro Chaves

doi:10.1007/s11250-023-03662-9

Cited by 5 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, it synchronizes nitrogen release with starch, promoting increased microbial protein production. Consequently, extruded urea can serve as a substitute for traditional protein sources, such as soybean meal, in ruminant diets 12 , 13 .…”

Section: Introductionmentioning

confidence: 99%

Changes in the skin characteristics of Nellore steers during the rearing phase in hot climate pasture supplemented with protein sources

Nonato,

Ítavo,

Brandão Ferreira Ítavo

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

We hypothesized that the protein source in supplements and the insolation and ambient temperature changes in different seasons could cause changes in the skin of Nellore steers during the rearing phase on warm-climate pasture. The objective of this study was to evaluate the effects of replacing true protein (soybean meal) with NPN (extruded urea) in the supplement on the skin characteristics of steers grazing on Marandu grass pastures. Thirty-six Nellore steers with an average initial weight of 250.0 kg and 15 months of age were used. Skin biopsies were performed at three different times: summer, autumn, and winter. The protein source has effects on the length of the glandular portion, number of follicles, and gland area in steers during the rearing phase at different seasons of the year. In the summer, the skin presented a higher compact structure, while in the autumn and winter, the skin presented a sparser arrangement. Skin from steers that received soybean meal in supplement had a more significant number of follicles in the summer and a smaller area and length of sweat glands. The dermis thickness of steers supplemented with soybean meal was greater than that of urea supplemented. The epidermis thickness and dermis of the steers' skin were greater at the autumn (April). Sweat gland depth was greater in autumn (April) and winter (July) than in summer (December). The protein source in the supplement alters the skin characteristics by increasing of dermis thickness of Nellore steers during the growth phase. The insolation and ambient temperature changes in different seasons alter the skin structure by increasing the epidermis and dermis thickness, sweat glands depth, and glands area of the skin of steers during the growth phase.

show abstract

Section: Introductionmentioning

confidence: 99%