Undernutrition in Steers: Its Relation to Metabolism, Digestion, and Subsequent Realimentation |
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24 hours activity Agric aliquot amino-acids amount animals apparatus approximately asparagine average value body-surface per 24 body-weight calories carbohydrates carbon dioxide carbon-dioxide production cent CO₂ computed cottonseed meal curtailment in ration curves daily December 22 decrease determined digestibility energy in feed excretion factor fattening period fattening rations feces given grams Group hay ration heat heat of combustion heat-production per 500 Helianthus annuus increase June June 12 kilogram leaves live weight lower maintenance period maintenance ration measurements metabolizable energy meter of body-surface nitrogen normal nutrient solution nutritive plane pasture petioles photosynthesis Professor Armsby protein pulse-rate ration curtailment realimentation refeeding representing respiration chamber respiration experiments sampling-can square meter stalls standard metabolism steer 11 submaintenance period submaintenance ration substance in feed Table temperature tion undernutrition urine water consumption water-free substance
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Page 195 - ... is called the maintenance ration of the particular animal. It is the quantity of feed necessary simply to support the animal when doing no work and yielding no material product. If an animal receiving exactly a maintenance ration were subjected to a so-called balance experiment, there would be found an exact equality between income and outgo of ash, nitrogen, carbon, hydrogen and energy, showing that the body was neither gaining nor losing protein, fat, carbohydrates nor ash.
Page 333 - ... with the control steers. It is concluded that adult steers may be carried through the winter on extraordinarily low rations and subjected to heavy losses in weight without experiencing any permanent damage and are able to resume their original weight and can be fattened for market.
Page 74 - As long as the conditions are favourable for assimilation, the leaf-cells are supplied with an abundance of newly assimilated materials, and so plentifully that the supply exceeds their powers of metabolism and translocation. The excess of nutritive material is in part at least deposited as starch. At this period there is little or no elaboration of diastase by the protoplasm, probably none at all in those cells in which starch deposition is in active progress. When the light fails and assimilation...
Page 195 - But much as a factory must first be supplied with enough power to keep in motion the shafting, belting and machinery in general before any product can be turned out, so the animal mechanism must be provided with sufficient feed to maintain the processes essential to life before any continued production is possible. The amount of feed required for this purpose is called the maintenance ration of the particular animal. It is the quantity of feed necessary simply to support the animal when doing no...
Page 81 - But it is the old adage that you can "Lead a horse to water, but you can not make him drink.
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Page 80 - COZ assimilation and respiration lies at a light intensity of 1.0 (Bunsen units X 100). The development of a Sinapis plant is very quick. In four weeks the dry matter content rises from 0.5 g. to 38 g. per 100 plants. In favorable conditions the daily per cent production of dry matter can be estimated as about 15. "In Oxalis the maximal intensity of CO2 assimilation is very small...
