High-sulfate water consumption determines intake and metabolic responses to protein supplementation in lambs consuming low-quality forage1
| Autor: | Agustin Lopez, Jose Ignacio Arroquy, Roberto Alejandro Distel, M. C. Barrionuevo, Nicolas DiLorenzo, A. V. Juárez Sequeira |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Nitrogen balance Soybean meal Forage 03 medical and health sciences chemistry.chemical_compound HIGH-SULFATE WATER Genetics Food science LAMBS Chemistry 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine Producción Animal y Lechería Total dissolved solids 040201 dairy & animal science NITROGEN SUPPLEMENTATION 030104 developmental biology CIENCIAS AGRÍCOLAS LOW-QUALITY FORAGES Hay Urea Animal Science and Zoology Digestion Otras Producción Animal y Lechería Food Science Blood sampling |
| Popis: | Twenty Hampshire lambs (31±4 kg BW) in individual metabolism cages were used in a 10 treatments by 2 period (n=4) trial, to evaluate the interaction between protein supplementation and sulfate water on intake and metabolic responses when fed on low quality grass hay (Megathyrsus maximus; 6.4% CP, 79.5% NDF). Treatment structure was a 2×5 factorial: 2 water qualities (WQ; low-sulfate [LS] and high-sulfate [HS]; 442 and 8,358 mg/kg of total dissolved solids, respectively) and 5 soybean meal levels (SBM; 0, 0.25, 0.50, 0.75 and 1.00% BW/d). After 15 d of adaptation, periods consisted of 5 d for determination forage and water intake, nitrogen balance and digestion measurements (d 16 to d 20); and for blood sampling and determination of ruminal hydrogen sulfide (H2S) concentration (d 21).Supplemental SBM × WQ interactions were significant for forage OM intake (FOMI; P=0.04) and total OM intake (TOMI; P=0.04), whereas a tendency was observed for total tract digestible OM intake (TTDOMI; P=0.07). Intake values of LS lambs were higher than those of HS lambs (P< 0.05) in the first and second level of SBM only. Water intake (WI) increased linearly (P 0.12), except for N utilization (N-retained/N-intake ratio; P< 0.01). Regardless of WQ, N-intake (P> 0.01), N-urine (P> 0.01) and N-balance increased linearly (P> 0.01) with SBM level. Water quality adversely affected N-intake and N-balance, although at the highest level of SBM no differences in N-balance were observed between LS and HS lambs (P = 0.85). No changes due to WQ were observed for both urea reabsorbed by kidneys (P = 0.63) and glomerular filtration rate (GFR; P = 0.30), but renal function was affected by SBM level (P < 0.01). There was supplemental SBM × WQ interaction for ruminalH2S concentration (P < 0.01), due mainly to a greater concentration from 0.25% BW SBM in HS than in LS lambs. In conclusion, these results confirmed the existence of an interaction between sulfate water and supplemental protein, which alters intake and metabolic responses when lambs are fed low-quality grass hay. Fil: López, A.. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Tucumán-Santiago del Estero. Estación Experimental Agropecuaria Santiago del Estero; Argentina. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina Fil: Arroquy, Jose Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Tucumán-Santiago del Estero. Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Juarez Sequeira, Ana Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina Fil: DiLorenzo, N.. University of Florida; Estados Unidos Fil: Barrionuevo, M. C.. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina Fil: Distel, Roberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina |
| Databáze: | OpenAIRE |
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