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Rabbit Feces as Feed for Ruminants and as an Energy Source.

Peiretti PG, Tassone S, Gai F, Gasco L, Masoero G - Animals (Basel) (2014)

Bottom Line: The chemical composition and the potential and experimental in vitro true digestibility (IVTD) and neutral detergent fiber digestibility (NDFD) of 148 feces samples were determined by using chemical methods, Daisy system digestibility and/or NIRS predictions.Running the Daisy system for rabbit feces in rumen fluid gave some inconsistencies, weakened the functional relationships, and appeared not to be correlated with the potential values of IVTD and NDFD.Thus we conclude that rabbit feces has potential value as a ruminant feed and for biogas production.

View Article: PubMed Central - PubMed

Affiliation: Institute of Sciences of Food Production, National Research Council, Largo Braccini 2, Grugliasco, 10095, Italy. piergiorgio.peiretti@ispa.cnr.it.

ABSTRACT
There are prospects for using novel feeds from various sources to provide ruminants with alternative sources of protein and energy such as by-products, and animal wastes. Rabbit feces are a concentrated source of fiber and could have commercial potential both as input biomass in anaerobic processes for biogas production, as well as a fibrous source for ruminal degradation. The aims of this work were to assess the potential as ruminant feeding and as biogas production of rabbit feces, in comparison with 12 crops. The chemical composition and the potential and experimental in vitro true digestibility (IVTD) and neutral detergent fiber digestibility (NDFD) of 148 feces samples were determined by using chemical methods, Daisy system digestibility and/or NIRS predictions. The average biomethane potential (BMP) was 286 ± 10 lCH4/kg SV with -4% vs. the crops average. Milk forage unit (milk FU), IVTD and NDFD of feces were 0.54 ± 0.06 milk FU/kg DM, 74% ± 3% and 50% ± 5%, respectively, with comparisons of -19%, -11% and -24% vs. the crops average. Reconstruction of the potential values based on the chemical constituents but using the crop partial least square model well agreed with the NIRS calibrations and cross-validation. In a global NIRS calibration of the feces and crops the relative predicted deviation for IVTD, NDFD and milk FU were 3.1, 2.9 and 2.6, respectively, and only 1.5 for BMP. Running the Daisy system for rabbit feces in rumen fluid gave some inconsistencies, weakened the functional relationships, and appeared not to be correlated with the potential values of IVTD and NDFD. Nevertheless, the energetic potential of feces appears to be similar to some conventional crops at different degrees of maturity. Thus we conclude that rabbit feces has potential value as a ruminant feed and for biogas production.

No MeSH data available.


Related in: MedlinePlus

Distribution of the biomethane potential (BMP) of the crops compared to the rabbit feces.
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animals-04-00755-f001: Distribution of the biomethane potential (BMP) of the crops compared to the rabbit feces.

Mentions: Turning to its potential for anaerobic production of biomethane, the feces measured only 4% below the average of the 12 crops, and Figure 1 reports the respective neighboring distributions. By contrast, a great difference (–19%) penalized the estimated feeding value of the feces (avg. 0.54 ± 0.06 milk FU) as compared to the mean milk FU for the 12 crops (0.66 ± 0.14 milk FU).


Rabbit Feces as Feed for Ruminants and as an Energy Source.

Peiretti PG, Tassone S, Gai F, Gasco L, Masoero G - Animals (Basel) (2014)

Distribution of the biomethane potential (BMP) of the crops compared to the rabbit feces.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494422&req=5

animals-04-00755-f001: Distribution of the biomethane potential (BMP) of the crops compared to the rabbit feces.
Mentions: Turning to its potential for anaerobic production of biomethane, the feces measured only 4% below the average of the 12 crops, and Figure 1 reports the respective neighboring distributions. By contrast, a great difference (–19%) penalized the estimated feeding value of the feces (avg. 0.54 ± 0.06 milk FU) as compared to the mean milk FU for the 12 crops (0.66 ± 0.14 milk FU).

Bottom Line: The chemical composition and the potential and experimental in vitro true digestibility (IVTD) and neutral detergent fiber digestibility (NDFD) of 148 feces samples were determined by using chemical methods, Daisy system digestibility and/or NIRS predictions.Running the Daisy system for rabbit feces in rumen fluid gave some inconsistencies, weakened the functional relationships, and appeared not to be correlated with the potential values of IVTD and NDFD.Thus we conclude that rabbit feces has potential value as a ruminant feed and for biogas production.

View Article: PubMed Central - PubMed

Affiliation: Institute of Sciences of Food Production, National Research Council, Largo Braccini 2, Grugliasco, 10095, Italy. piergiorgio.peiretti@ispa.cnr.it.

ABSTRACT
There are prospects for using novel feeds from various sources to provide ruminants with alternative sources of protein and energy such as by-products, and animal wastes. Rabbit feces are a concentrated source of fiber and could have commercial potential both as input biomass in anaerobic processes for biogas production, as well as a fibrous source for ruminal degradation. The aims of this work were to assess the potential as ruminant feeding and as biogas production of rabbit feces, in comparison with 12 crops. The chemical composition and the potential and experimental in vitro true digestibility (IVTD) and neutral detergent fiber digestibility (NDFD) of 148 feces samples were determined by using chemical methods, Daisy system digestibility and/or NIRS predictions. The average biomethane potential (BMP) was 286 ± 10 lCH4/kg SV with -4% vs. the crops average. Milk forage unit (milk FU), IVTD and NDFD of feces were 0.54 ± 0.06 milk FU/kg DM, 74% ± 3% and 50% ± 5%, respectively, with comparisons of -19%, -11% and -24% vs. the crops average. Reconstruction of the potential values based on the chemical constituents but using the crop partial least square model well agreed with the NIRS calibrations and cross-validation. In a global NIRS calibration of the feces and crops the relative predicted deviation for IVTD, NDFD and milk FU were 3.1, 2.9 and 2.6, respectively, and only 1.5 for BMP. Running the Daisy system for rabbit feces in rumen fluid gave some inconsistencies, weakened the functional relationships, and appeared not to be correlated with the potential values of IVTD and NDFD. Nevertheless, the energetic potential of feces appears to be similar to some conventional crops at different degrees of maturity. Thus we conclude that rabbit feces has potential value as a ruminant feed and for biogas production.

No MeSH data available.


Related in: MedlinePlus