Abstract
Twenty Dorper x Pelibuey male lambs were used to evaluate the effect of substitution of forage with fresh orange pulp (FOP) in diets for fattening lambs on productive behavior, nutrient intake, apparent digestibility coefficient, and feeding costs. Lambs were divided into five groups (n = 4) and then housed in individual pens during 70 d. Treatments consisted of five levels of FOP (0, 25, 50, 75 and 100%) which substituted buffel grass hay on the base diet (40:60%, forage:concentrate). Additionally, changes in chemical composition of FOP stored in stack during 8 d were evaluated (from the day 1 until day 8). Daily feed intake expressed as kg/day and % live weight, lamb growth rate, feeding cost of each lamb per day and per fattening period, hemicellulose intake, and DM, OM, CP, NDF and hemicellulose digestibility showed a quadratic effect (P < 0.05), while DM, OM and CP intake presented a cubic effect (P < 0.05) with the increasing level of FOP. The maximum estimated value for those variables was observed at 75% of hay replacement with FOP. With respect to changes in chemical composition of pulp stored, DM content increased (P = 0.0011) from 210 to 310 g/kg FOP and OM, fiber fraction, and ash content were constant (P > 0.05) among storage days. Therefore, replacing around 75% of buffel grass hay with FOP in diets for fattening lambs resulted in the best growth rate and more efficient diet utilization. Fresh orange pulp stored in a stack did not change its chemical composition, and did not affect its utilization as a sheep feedstuff.
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Abbreviations
- FOP:
-
Fresh Orange Pulp
- DM:
-
Dry Matter
- OM:
-
Organic Matter
- CP:
-
Crude Protein
- NDF:
-
Neutral Detergent Fiber
- ADF:
-
Acid Detergent Fiber
- LW:
-
Live Weight
- AOAC:
-
Association of Official Analytical Chemists
- NRC:
-
National Research Council
- SAS:
-
Statistical Analysis System
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Acknowledgements
This research was financially supported by professor Arnoldo González-Reyna, and the UAM of Agronomy and Science of the University Autonomous of Tamaulipas, located in Ciudad Victoria, Tamaulipas, México. In addition, we acknowledge to MC. Javier Hernández Meléndez, MC. Oscar Hernández Ruiz and Dr. Pedro Zárate Fortuna for their technical help provided.
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Macías-Cruz, U., Quintero-Elisea, J.A., Avendaño-Reyes, L. et al. Buffel grass (Cenchrus ciliaria L.) substitution for orange pulp on intake, digestibility, and performance of hairsheep lambs. Trop Anim Health Prod 42, 223–232 (2010). https://doi.org/10.1007/s11250-009-9410-z
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DOI: https://doi.org/10.1007/s11250-009-9410-z