Browsing by Subject "Proteins in animal nutrition"
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Item Effect of dietary protein source and level on nitrogen metabolism in lambs(Texas Tech University, 1986-05) May, TammyNot availableItem Effect of protein source and level on performance of feedlot cattle(Texas Tech University, 1987-08) Eck, Thomas PeterNot availableItem Effects of dietary sodium chloride on the availability and utilization of proteins in laboratory animals(Texas Tech University, 1983-05) Hussain, HadidahNot availableItem Effects of protein supplementation on the consumption of salt cedar in goats.(2011-05-25T17:01:19Z) Garcia, Ruben A.; Garcia, Ruben A.; Scott, Cody; Salisbury, Michael; Engdahl, Gil R.; May, Brain J.; Angelo State University. Department of Agriculture.Saltcedar (Tamarix ramosissima Ledeb.) has encroached upon many Texas riparian and floodplain areas, causing decreases in water quality and plant/animal diversity. The objectives of this study were to determine if (1) goats would increase consumption of salt cedar, and (2) if protein supplementation improved salt cedar intake. Goats (n=20) were randomly selected and divided into 2 separate treatments. Treatment 1 was supplemented daily with a 37% crude protein ration and Treatment 2 (control group) was not supplemented. All treatments were given a basal ration of alfalfa (2.5% BW) and offered salt cedar. Salt cedar intake increased (P<0.05) on a daily basis in both treatments. Protein supplementation did not affect salt cedar intake. Alfalfa intake was similar between treatments. Both treatments gained weight during the study. Collectively, the results of this study suggest that goats will readily consume salt cedar, and protein supplementation has little apparent effect on salt cedar intake.Item Evaluation of protein and energy in swine rations(Texas Tech University, 1973-08) Ingram, Shannon H.Not availableItem Growth of white-tailed deer fawns following dietary protein restriction(Texas Tech University, 1998-08) Lambert, Billy C.Compensatory growth is defined as the faster rate of growth exhibited by nutritionally stunted animals after adequate nutrition is available. The ability of whitetailed deer (Odocoileus virainianus) fawns to recover from nutritional deprivation, specifically protein deficiency, is important from both economic and biological standpoints. The present study was designed to document the effects of a winter and spring protein deficiency on growth of fawns, reproductive characteristics of yearling does, and antler development of yearling bucks; and to quantify compensatory growth in nutritionally stunted white-tailed deer.Item Influence of protein supplementation on forage intake and dietary selectivity of grazing steers(Texas Tech University, 1987-08) Reeves, G. WayneResearch was conducted on tobosagrass (Hilaria mutica) range during April through July in 1985 and 1986 to quantify the effect of feeding three levels (0.00, 0.34, and 0.68 kg/hd/d) of cottonseed meal on dietary nutritional and botanical constituents, and forage intake of grazing steers. Esophageally fistulated steers collected samples during three week-long periods within each season that correspond to early, mid and late phenological stages of tobosagrass. Extrusa samples were analyzed for crude protein (CP), neutral detergent fiber (NDF), and in vitro digestible organic matter (DOM). Extrusa samples were also systematically scanned at 15x magnification using the microscope point technique. Material beneath each of 100 points/sample tray was identified as tobosagrass, alkali sacaton ^Sporobolus airoides), composited other grass, composited forbs or browse, as well as live vs. dead and whether the material was leaf, stem or flower. Organic matter intake (OMI) during 1985 was determined from fecal output and DOM. Digestible energy intake (Mcal/d) during 1985 was calculated as the difference between gross energy consumed and gross energy excreted. During 1985, steers receiving 0.34 and 0.68 kg/d CSM selected diets higher (P<0.05) in CP (12.0 and 10.5%, respectively) than unsupplemented steers (9.4%). Steers fed 0.68 kg/d during April 1986 consumed diets higher (P<0.05) in CP (10.3%) than those receiving 0.34 kg/d (7.1%) or no supplement (8.2%). In late June, steers receiving 0.00 and 0.34 kg/d CSM consumed diets higher (P<0.05) (13.9 and 14.4%, respectively) in CP than steers fed 0.68 kg/d. Neither dietary NDF or the digestibility of organic matter were affected (P>0.05) during 1985 or 1986. Steers fed 0.68 kg/d CSM consumed more (P<0.05) organic matter (60.0 g/kg BW^-^S) than unsupplemented animals (4 8.4 g/kg BwO-75) in 1985 and had a higher (P<0.05) digestible energy intake (7.68 Mcal/d) than steers fed 0.34 kg/d CSM (6.67 Mcal/d) and unsupplemented steers (6.34 Mcal/d). Supplemental CSM did not alter (P>0.05) the percentage of tobosagrass, alkali sacaton, other grasses, forbs, browse, live leaf, live stem, live flower, dead flower or the leaf/stem ratio selected by steers in 1985. Steers supplemented during 1985 with 0.68 kg/d selected diets lower (P<0.05) in dead leaf (10.5%) and dead stem (5.4%) than unsupplemented (16.4 and 7.7%, respectively) or low supplemented animals (13.4 and 6.9%, respectively). Unsupplemented steers during 1986 chose diets higher (P<0.05) ii-^ alkali sacaton (41.4%) and live leaf (49.2%) than steers fed 0.34 kg/d (32.1 and 43.7%, respectively) and 0.68 kg/d (35.4 and 45.5%, respectively). Dietary leaf/stem ratio was unaffected (P>0.05) by supplemental CSM in 1985 and 1986. Data suggest that except for possible increases in dietary CP, dietary nutrient and botanical composition will not generally be altered by supplemental protein but intake of organic matter and digestible energy may increase as a result of cottonseed meal supplementation.Item LCP Cottonseed Flour as a Protein Source for Swine(Texas Tech University, 1976-05) Cooper, Roy GNot Available.Item Item Sunflower meal as a protein supplement for growing ruminants(Texas Tech University, 1979-08) Beville, Robert NelsonNot AvailableItem The influence of source and quantity of protein upon the development of immunity and resistance to African trypanosomiasis(Texas Tech University, 1985-08) Norton, Jerry DonThough it is well documented that severe protein deprivation inhibits the development of the immune response and exacerbates certain infections, little has been done to study the effects of native diets upon endemic diseases or immunity. Therefore, protein-restricted diets were formulated for mice to mimic the sources and amounts measured in human diets of the Batouri region of Cameroon, endemic for African trypanosomiasis. Weanling C57BL/6 female mice were fed a diet that contained 73% of the recommended daily allowance (RDA) of protein. The sources of protein were all plant (cornmeal), all animal (casein), or a ratio that reflected the native diet (2.2 parts cornmeal to 1 part casein). Diets were isocaloric on a weight basis, equal in lipids, and adequate in vitamins and minerals. Control mice were fed lab chow or 2 times the RDA of animal protein (casein). Mice fed plant or native diets survived infections with Trypanosoma brucei gambiense at higher rates than mice fed the other three diets. To determine if this resistance was immunologic in origin, mice were immunized with sheep erythrocytes (SE) or TNP-Ficoll. The plaque-forming cell response was directly related to survival. Therefore, cornmeal was an adequate source of protein for the development of immunity and resistance.Item Utilization of sorghum and corn grains impregnated with dry urea(Texas Tech University, 1987-05) Heddins, Christopher EdwardNot available