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Performance of sheep and goats fed arctostaphylos canescens with and without polyethylene glycol supplementation
Year:
2011
Source of publication :
Rangeland Ecology and Management
Authors :
Brosh, Arieh
;
.
Volume :
64
Co-Authors:
Narvaez, N., Department of Animal Science, University of California, Davis, CA 95616, United States
Brosh, A., Newe ya'Ar Research Center, PO Box 1021, Ramat Yishay 30095, Israel
Mellado, M., Department of Nutrition and Foods, Universidad Autonoma Agraria Antonio Narro, Saltillo, Coach. 25315, Mexico
Pittroff, W., Department of Animal Science, University of California, Davis, CA 95616, United States
Facilitators :
From page:
85
To page:
91
(
Total pages:
7
)
Abstract:
Arctostaphylos canescens Eastw. is considered an important element in the chaparral fire matrix and an invasive plant in coniferous forest plantations in California. Previous studies reported that dry matter intake of Arctostaphylos was low, presumably because of its low nutritional quality and high condensed tannin (CT) content. We hypothesized that intake and digestibility of Arctostaphylos could be increased by the provision of a tannin-complexing agent polyethylene glycol (PEG). This study determined the effects of PEG (MW 4000) supplementation on intake (I) and digestibility (D) of Arctostaphylos in goats and sheep. Polyethylene glycol was added to drinking water at four levels (0.3%, 0.15%, 0.05%, and 0%) of body weight (BW). Alfalfa pellets were used as diet supplement at 1.5% of BW. Nutritional quality of Arctostaphylos was low as compared with alfalfa pellets. Arctostaphylos crude protein (CP) levels were low (4.5% vs. 17.9%) and CT concentration was high (23.1% vs. 0%), whereas estimates of in vitro organic matter digestibility (OMD, 36.6%) and metabolizable energy (5.1 MJ·kg-1 dry matter [DM]) in Arctostaphylos were almost half of those found for alfalfa pellets (70.3% and 9.5 MJ·kg-1 DM). A curvilinear increase (P<0.05) in nutrient intake (per g·d-1 and per kg BW0.75) was observed in goats and sheep as PEG levels increased, although a linear increase (P<0.001) was observed in CP intake (g·d-1) of Arctostaphylos by goats. Addition of PEG curvilinearly increased (P<0.05) digestibility of DM, CP, and neutral and acid detergent fiber, but quadratically increased (P<0.05) that of OM in goats and sheep. Incorporation of PEG in drinking water at the level of 0.15% BW in sheep and goats was effective to maximize inactivation of CT in Arctostaphylos. However, the success in adopting this practice as a useful tool in vegetation management programs will depend on the cost-benefit ratio. © Society for Range Management.
Note:
Related Files :
artificial diet
California
drinking water
dry matter
invasive species
Medicago sativa
sheep
shrub
Show More
Related Content
More details
DOI :
10.2111/REM-D-09-00037.1
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
24646
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:09
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Scientific Publication
Performance of sheep and goats fed arctostaphylos canescens with and without polyethylene glycol supplementation
64
Narvaez, N., Department of Animal Science, University of California, Davis, CA 95616, United States
Brosh, A., Newe ya'Ar Research Center, PO Box 1021, Ramat Yishay 30095, Israel
Mellado, M., Department of Nutrition and Foods, Universidad Autonoma Agraria Antonio Narro, Saltillo, Coach. 25315, Mexico
Pittroff, W., Department of Animal Science, University of California, Davis, CA 95616, United States
Performance of sheep and goats fed arctostaphylos canescens with and without polyethylene glycol supplementation
Arctostaphylos canescens Eastw. is considered an important element in the chaparral fire matrix and an invasive plant in coniferous forest plantations in California. Previous studies reported that dry matter intake of Arctostaphylos was low, presumably because of its low nutritional quality and high condensed tannin (CT) content. We hypothesized that intake and digestibility of Arctostaphylos could be increased by the provision of a tannin-complexing agent polyethylene glycol (PEG). This study determined the effects of PEG (MW 4000) supplementation on intake (I) and digestibility (D) of Arctostaphylos in goats and sheep. Polyethylene glycol was added to drinking water at four levels (0.3%, 0.15%, 0.05%, and 0%) of body weight (BW). Alfalfa pellets were used as diet supplement at 1.5% of BW. Nutritional quality of Arctostaphylos was low as compared with alfalfa pellets. Arctostaphylos crude protein (CP) levels were low (4.5% vs. 17.9%) and CT concentration was high (23.1% vs. 0%), whereas estimates of in vitro organic matter digestibility (OMD, 36.6%) and metabolizable energy (5.1 MJ·kg-1 dry matter [DM]) in Arctostaphylos were almost half of those found for alfalfa pellets (70.3% and 9.5 MJ·kg-1 DM). A curvilinear increase (P<0.05) in nutrient intake (per g·d-1 and per kg BW0.75) was observed in goats and sheep as PEG levels increased, although a linear increase (P<0.001) was observed in CP intake (g·d-1) of Arctostaphylos by goats. Addition of PEG curvilinearly increased (P<0.05) digestibility of DM, CP, and neutral and acid detergent fiber, but quadratically increased (P<0.05) that of OM in goats and sheep. Incorporation of PEG in drinking water at the level of 0.15% BW in sheep and goats was effective to maximize inactivation of CT in Arctostaphylos. However, the success in adopting this practice as a useful tool in vegetation management programs will depend on the cost-benefit ratio. © Society for Range Management.
Scientific Publication
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