Effects of Supplementation on Juniper Intake by Goats |
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| Affiliation: | 1. Post Doctoral Research Associate, Texas A&M University Agricultural Experiment Station, Sonora, TX 76950;2. Professor, Texas A&M University Agricultural Experiment Station, Sonora, TX 76950;3. Resident Director, Texas Agricultural Experiment Station, Texas A&M University Agricultural Research and Extension Center, San Angelo, TX 76901;4. Professor, Texas Agricultural Experiment Station, Texas A&M University Agricultural Research and Extension Center, San Angelo, TX 76901;5. Professor, Department of Natural Resources and Agronomy, Institute of Plant Science, Agricultural Research Organization, the Volcani Center, Bet Dagan, Israel 50250;1. Rangeland Scientist, USDA-ARS Eastern Oregon Agricultural Research Center, Burns, OR 97720, USA.;2. Research Assistant, USDA-ARS Eastern Oregon Agricultural Research Center, Burns, OR 97720, USA.;3. Assistant Professor, Oregon State University, Burns, OR 97720, USA.;1. Range Program Manager, US Forest Service, Redding, CA 96002, USA.;2. Associate Research Professor, Institute of Public Goods and Policies (IPP), Spanish National Research Council (CSIC), 28037 Madrid, Spain.;3. Professor, Department of Environmental Science, Policy and Management, University of California, Berkeley, Berkeley, CA 94720, USA.;4. Vice President, Division of Agriculture and Natural Resources, University of California, Oakland, CA 94607, USA.;1. Research Ecologist, USDA-ARS Rangeland Resources Research Unit, Cheyenne, WY 82009, USA;2. Supervisory Research Rangeland Management Specialist and Research Leader, USDA-ARS Rangeland Resources Research Unit, Cheyenne, WY 82009, USA;3. Research Leader, USDA-ARS Northern Great Plains Research Laboratory, Mandan, ND 58554, USA;4. Research Leader, USDA-ARS Fort Keogh Livestock and Range Research Laboratory, Miles City, MT 59301, USA;5. Ecologist, USDA-ARS Fort Keogh Livestock and Range Research Laboratory, Miles City, MT 59301, USA.;6. Research Rangeland Management Specialist, USDA-ARS Northern Great Plains Research Laboratory, Mandan, ND 58554, USA;7. Research Animal Scientist, USDA-ARS Northern Great Plains Research Laboratory, Mandan, ND 58554, USA;1. Soil Scientist, USDA-ARS, Fort Collins, CO 80526, USA;2. Biological Science Technician, USDA-ARS, Fort Collins, CO 80526, USA;3. Hydrologist, USDA-ARS, Fort Collins, CO 80526, USA;4. Graduate Student, Colorado State University, Fort Collins, CO 80524, USA;5. Range Conservationist, USDA-NRCS, Bismarck, ND 58502, USA. |
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| Abstract: | The potential for winter supplementation to increase juniper intake by goats on rangelands in the Edwards Plateau region of Texas was assessed in two experiments. The first experiment evaluated the effect on juniper intake of either no supplementation (negative control) or supplementation with corn, alfalfa, or cottonseed meal fed at an isonitrogenous protein level of 1.5 g · kg body weight-1 for 12 days. Redberry juniper (Juniperus pinchotii Sudw.) consumption by individually penned Spanish, Boer × Spanish, Spanish × Angora, and Angora goats was measured on days 11 and 12. Each goat received each supplement in a complete 4 × 4 Latin square design. Juniper intake increased for goats supplemented with alfalfa and cottonseed meal (P = 0.001), but not for those supplemented with corn (P = 0.944). Boer × Spanish goats did not differ in levels of consumption (P = 0.085) from the other breeds. A second study investigated the effect of either no supplementation or soybean meal supplementation on juniper consumption by free grazing Angora and Boer × Spanish goats. Forty goats were assigned to four pasture groups by breed and previous juniper intake, and randomly allocated to either the treatment (supplementation) or control (no supplementation) regime in a complete block design. After 4 days of grazing and supplementation, fecal samples were collected to estimate percent of juniper in the diet using near-infrared spectroscopy. Goats were then rotated to another pasture. Juniper intake was highest for goats supplemented with soybean meal (P = 0.034). Breed of goat did not affect intake (P = 0.240). Goats previously categorized as high juniper consumers based upon prior measurements of juniper intake ate more juniper (P = 0.003) than those classified as low consumers. This research indicates that the effectiveness of goats for biological control of juniper can be improved with a high protein, low starch supplement. |
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