A series of experiments examined intake, digestion and production with diets of roughages supplem... more A series of experiments examined intake, digestion and production with diets of roughages supplemented with grain legumes, usually at levels from 5-20 g/kg LW. For goats, lupins caused less reduction in roughage intake than insect-damaged lablab and supported greater growth rates. In a ration containing 35% maize and 35% grain legume fed to sheep, substitution of sound lablab for lupins had little effect. As a supplement to roughages for live weight gain and wool growth, the ranking was lupins, cowpeas, lablab and navy beans. Lupins supplied more ruminal NH3 than lablab without causing a dangerous level of acidity, but at high levels still caused depression of digestion of roughage. Antibiotics did not consistently improve performance of sheep fed grain legumes. Concentrations of lectins and trypsin inhibitors were highest in navy beans but were not related to digestibility in nylon bags or to absorption from the small intestine. We conclude that the differences in nutritional value...
Australian Journal of Experimental Agriculture, 1995
Lupins and cowpeas were fed at 0.0, 0.5, 1.0, and 2.0% liveweight (LW) to groups of 6 or 7 South ... more Lupins and cowpeas were fed at 0.0, 0.5, 1.0, and 2.0% liveweight (LW) to groups of 6 or 7 South Australian Merino rams for 11 weeks as supplements to a maintenance diet of grass hay. Productive and reproductive parameters were examined. Supplementation at all levels of either grain increased (P<0.001) LW, condition score, backfat thickness, and wool growth, with rams showing similar responses when given cowpeas and lupins. The weights of the pancreas of rams decreased…
Three groups of mature rams were maintained on diets of hay, hay + 2% lupin or hay + 2% cowpea fo... more Three groups of mature rams were maintained on diets of hay, hay + 2% lupin or hay + 2% cowpea for 11 weeks. Serial blood samples were taken at 15-min intervals for 12 h for the determination of GH and IGF-I content by radioimmunoassay and for IGF-binding protein-3 (IGFBP-3) levels by Western blotting. The rams were killed after 77 days of supplementary feeding and their pituitary glands analysed for content of GH and GH mRNA. Mean plasma GH and baseline GH levels were significantly (P < 0.01) decreased in the rams fed lupin and cowpea compared with controls fed hay and GH pulse amplitude was significantly (P < 0.001) decreased in the group fed the cowpea diet. The frequency of GH pulses was not significantly altered by either treatment. Plasma concentrations of IGF-I were elevated in rams fed lupin (P < 0.001) or cowpea (P < 0.05). IGFBP-3 levels were not significantly (P > 0.05) altered by either treatment. There were no significant differences in pituitary content ...
A series of experiments examined intake, digestion and production with diets of roughages supplem... more A series of experiments examined intake, digestion and production with diets of roughages supplemented with grain legumes, usually at levels from 5-20 g/kg LW. For goats, lupins caused less reduction in roughage intake than insect-damaged lablab and supported greater growth rates. In a ration containing 35% maize and 35% grain legume fed to sheep, substitution of sound lablab for lupins had little effect. As a supplement to roughages for live weight gain and wool growth, the ranking was lupins, cowpeas, lablab and navy beans. Lupins supplied more ruminal NH3 than lablab without causing a dangerous level of acidity, but at high levels still caused depression of digestion of roughage. Antibiotics did not consistently improve performance of sheep fed grain legumes. Concentrations of lectins and trypsin inhibitors were highest in navy beans but were not related to digestibility in nylon bags or to absorption from the small intestine. We conclude that the differences in nutritional value...
Australian Journal of Experimental Agriculture, 1995
Lupins and cowpeas were fed at 0.0, 0.5, 1.0, and 2.0% liveweight (LW) to groups of 6 or 7 South ... more Lupins and cowpeas were fed at 0.0, 0.5, 1.0, and 2.0% liveweight (LW) to groups of 6 or 7 South Australian Merino rams for 11 weeks as supplements to a maintenance diet of grass hay. Productive and reproductive parameters were examined. Supplementation at all levels of either grain increased (P<0.001) LW, condition score, backfat thickness, and wool growth, with rams showing similar responses when given cowpeas and lupins. The weights of the pancreas of rams decreased…
Three groups of mature rams were maintained on diets of hay, hay + 2% lupin or hay + 2% cowpea fo... more Three groups of mature rams were maintained on diets of hay, hay + 2% lupin or hay + 2% cowpea for 11 weeks. Serial blood samples were taken at 15-min intervals for 12 h for the determination of GH and IGF-I content by radioimmunoassay and for IGF-binding protein-3 (IGFBP-3) levels by Western blotting. The rams were killed after 77 days of supplementary feeding and their pituitary glands analysed for content of GH and GH mRNA. Mean plasma GH and baseline GH levels were significantly (P < 0.01) decreased in the rams fed lupin and cowpea compared with controls fed hay and GH pulse amplitude was significantly (P < 0.001) decreased in the group fed the cowpea diet. The frequency of GH pulses was not significantly altered by either treatment. Plasma concentrations of IGF-I were elevated in rams fed lupin (P < 0.001) or cowpea (P < 0.05). IGFBP-3 levels were not significantly (P > 0.05) altered by either treatment. There were no significant differences in pituitary content ...
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