Effects of Combining Feed Grade Urea and a Slow-release Urea Product on Performance, Dietary Energetics and Carcass Characteristics of Feedlot Lambs Fed Finishing Diets with Different Starch to Acid Detergent Fiber Ratios
| Autor: | M. A. López-Soto, F.G. Ríos, Alberto Barreras, Alejandro Plascencia, Carlos R. Rivera-Mendez, B. I. Castro, H. Dávila-Ramos, Richard A. Zinn, J.D. Urías-Estrada, Alfredo Estrada-Angulo |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Finishing Lambs
Dairy & Animal Science 040301 veterinary sciences Starch Soybean meal lcsh:Animal biochemistry Carcass chemistry.chemical_element Forage Article Growth Performance 0403 veterinary science chemistry.chemical_compound Animal science Affordable and Clean Energy Animal Production Dry matter lcsh:QP501-801 Nutrition lcsh:SF1-1100 Dietary Energetics 0402 animal and dairy science 04 agricultural and veterinary sciences Straw 040201 dairy & animal science Nitrogen Slow-release Urea chemistry Feedlot Urea Animal Science and Zoology lcsh:Animal culture Food Science |
| Zdroj: | Asian-Australasian Journal of Animal Sciences Asian-Australasian Journal of Animal Sciences, Vol 29, Iss 12, Pp 1725-1733 (2016) Asian-Australasian journal of animal sciences, vol 29, iss 12 |
| ISSN: | 1976-5517 1011-2367 |
| Popis: | Recent findings have shown that microbial nitrogen flow and digestible energy of diets are increased when urea is combined with a slow-release urea (SRU) in diets with a starch to acid detergent fibre ratio (S:F) 4:1. This affect is attributable to enhanced synchrony between ruminal N availability for microbial growth and carbohydrate degradation. To verify the magnitude of this effects on lamb performance, an experiment was conducted to evaluate the effects of combining urea and a SRU in diets containing S:F ratios of 3:1, 4:1, or 5:1 on performance, dietary energetics and carcass characteristics of finishing lambs. For that, 40 Pelibuey×Katahdin lambs (36.65±3 kg) were assigned to one of five weight groupings in 20 pens (5 repetition/treatments). The S:F ratio in the diet was manipulated by partially replacing the corn grain and dried distiller's grain with solubles by forage (wheat straw) and soybean meal to reach S:F ratios of 3:1, 4:1 or 5:1. An additional treatment of 4:1 S:F ratio with 0.8% urea as the sole source of non-protein nitrogen was used as a reference for comparing the effect of urea combination vs. conventional urea at the same S:F ratio. There were no treatment effects on dry matter intake (DMI). Compared the urea combination vs urea at the same S:F ratio, urea combination increased (p |
| Databáze: | OpenAIRE |
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