Effects of exogenous enzymes on nutrient digestibility, ruminal fermentation and growth performance in beef steers
Forty crossbred steers [Baladi x Friesian, average BW 153 more or less 5.14kg] were used to evaluate the effects of exogenous enzyme [ENZ] addition on nutrient intake, digestion, ruminal fermentation and feed conversion in beef steers. Steers were randomly assigned to two groups of 20 animals and fe...
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| Formato: | Artículo |
| Lenguaje: | Español |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2013salem.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Effects of exogenous enzymes on nutrient digestibility, ruminal fermentation and growth performance in beef steers |
| 520 | |a Forty crossbred steers [Baladi x Friesian, average BW 153 more or less 5.14kg] were used to evaluate the effects of exogenous enzyme [ENZ] addition on nutrient intake, digestion, ruminal fermentation and feed conversion in beef steers. Steers were randomly assigned to two groups of 20 animals and fed individually a total mixed ration [TMR] without [CTRL] or with addition of 40g/hd/d of an enzyme mixture [ZADO®]. The ENZ mixture was added for 220 days and in vivo apparent digestibility was measured on days 210-220. Enzyme addition did not affect [P=0.1] DM intake, whereas it increased [P less than 0.05] total tract apparent digestibility of all nutrients. The magnitude of improvement in digestibility varied among nutrients, with the highest improvement occurring in digestibility of NDF and ADF [21.8 percent and 26.7 percent, respectively]. Addition of ENZ also increased [P less than 0.05] concentrations of rumen ammonia N and total short chain fatty acids [SCFA] before and 3h post-feeding. Allantoin concentration total purine derivates were increased [P=0.04] with enzyme addition while uric acid was not affected [P=0.05]. Live-weight gain was also higher [P less than 0.01] in steers supplemented with ENZ. In conclusion, adding the exogenous enzyme product increased live-weight gain by 16 percent due to increased nutrient digestibility. | ||
| 653 | 0 | |a DIGESTIBILITY | |
| 653 | 0 | |a ENZYMES | |
| 653 | 0 | |a LIVE-WEIGHT GAIN | |
| 653 | 0 | |a PURINE DERIVATES | |
| 653 | 0 | |a STEERS | |
| 653 | 0 | |a ANIMALIA | |
| 700 | 1 | |a Salem, A. Z. M. |9 72612 | |
| 700 | 1 | |a Gado, H. M. |9 72613 | |
| 700 | 1 | |9 10874 |a Colombatto, Darío | |
| 700 | 1 | |a Elghandour, M. M. Y. |9 72614 | |
| 773 | |t Livestock Science |g vol.154, no.1-3 (2013), p.69-73 | ||
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| 900 | |a ^tEffects of exogenous enzymes on nutrient digestibility, ruminal fermentation and growth performance in beef steers | ||
| 900 | |a ^aSalem^bA.Z.M. | ||
| 900 | |a ^aGado^bH.M. | ||
| 900 | |a ^aColombatto^bD. | ||
| 900 | |a ^aElghandour^bM.M.Y. | ||
| 900 | |a ^aSalem^bA. Z. M. | ||
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| 900 | |a ^aColombatto^bD. | ||
| 900 | |a ^aElghandour^bM. M. Y. | ||
| 900 | |a ^aSalem, A.Z.M.^tFacultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Mexico | ||
| 900 | |a ^aSalem, A.Z.M.^tFaculty of Agriculture (El-Shatby), Alexandria University, Egypt | ||
| 900 | |a ^aGado, H.M.^tDepartment of Animal Production, Faculty of Agriculture, Ain Shams University, Cairo, Egypt | ||
| 900 | |a ^aColombatto, D.^tFacultad de Agronomía, Universidad de Buenos Aires, Argentina | ||
| 900 | |a ^aElghandour, M.M.Y.^tFacultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Mexico | ||
| 900 | |a ^tLivestock Science^cLivest. Sci. | ||
| 900 | |a eng | ||
| 900 | |a 69 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 154, no. 1-3 | ||
| 900 | |a 73 | ||
| 900 | |a DIGESTIBILITY | ||
| 900 | |a ENZYMES | ||
| 900 | |a LIVE-WEIGHT GAIN | ||
| 900 | |a PURINE DERIVATES | ||
| 900 | |a STEERS | ||
| 900 | |a ANIMALIA | ||
| 900 | |a Forty crossbred steers [Baladi x Friesian, average BW 153 more or less 5.14kg] were used to evaluate the effects of exogenous enzyme [ENZ] addition on nutrient intake, digestion, ruminal fermentation and feed conversion in beef steers. Steers were randomly assigned to two groups of 20 animals and fed individually a total mixed ration [TMR] without [CTRL] or with addition of 40g/hd/d of an enzyme mixture [ZADO®]. The ENZ mixture was added for 220 days and in vivo apparent digestibility was measured on days 210-220. Enzyme addition did not affect [P=0.1] DM intake, whereas it increased [P less than 0.05] total tract apparent digestibility of all nutrients. The magnitude of improvement in digestibility varied among nutrients, with the highest improvement occurring in digestibility of NDF and ADF [21.8 percent and 26.7 percent, respectively]. Addition of ENZ also increased [P less than 0.05] concentrations of rumen ammonia N and total short chain fatty acids [SCFA] before and 3h post-feeding. Allantoin concentration total purine derivates were increased [P=0.04] with enzyme addition while uric acid was not affected [P=0.05]. Live-weight gain was also higher [P less than 0.01] in steers supplemented with ENZ. In conclusion, adding the exogenous enzyme product increased live-weight gain by 16 percent due to increased nutrient digestibility. | ||
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