Browsing by Author "Thomas, Horace R."
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- Bacterial and yeast preparations for starter and grower rationsKornegay, Ervin T.; Thomas, Horace R. (Virginia Agricultural Experiment Station, 1973-02)Antibiotic combinations were effective in stimulating growth, with the major effect being upon feed intake
- A comparison of feeding methods and 25 percent vs. 50 percent slotted floor for swineThomas, Horace R.; Kornegay, Ervin T. (Virginia Agricultural Experiment Station, 1970-05)Two trials studied different feeding methods using pens with 25 and 50% slotted floors. There was no significant difference in the performance of pigs housed in pens with the 25 and 50% slotted floors
- A comparison of high lysine corn and normal corn in combination with peanut oil for swine growing rationsThomas, Horace R.; Kornegay, Ervin T. (Virginia Agricultural Experiment Station, 1970-05)Although lysine content of high lysine corn was greater than that of normal corn it is not high enough to overcome completely the lysine deficiency of peanut meal as the major source of protein for growing pigs
- Double deck finishing of swineThomas, Horace R.; Kornegay, Ervin T. (Virginia Agricultural Experiment Station, 1970-05)Result of this study is that pigs can be grown on double decks without getting reduced performance if the top deck is properly ventilated and insulated during hot summer months
- Effects of controlled temperatures, slotted floors and space allowances on swine production in southeastern VirginiaMcNeil, Marshall; Bell, E. Stephen; Stanley, James M.; Thomas, Horace R.; Kelly, Robert F. (Virginia Agricultural Experiment Station, 1969-08)Study showed that rate of gain, feed efficiency and carcass quality was not changed by keeping hogs in optimal temperature of 65 to 70 degrees.Cleanliness of pen floor and animals was improved by increasing slotted floor of pens
- Feed additives for swine 2. Copper and iron additions for grower rationsKornegay, Ervin T.; Thomas, Horace R. (Virginia Agricultural Experiment Station, 1973)When added at 150-200 ppm, dietary copper acted as a growth stimulant. Supplemental iron was of no benefit. The greatest effect of the copper was on average daily gain
- Feed additives for swine 3. Comparison of copper and antibiotics for grower rationsKornegay, Ervin T.; Thomas, Horace R. (Virginia Agricultural Experiment Station, 1973)Antibiotic combinations appeared to be slightly more effective at improving gain in swine than copper
- A method of estimating the feeding value of swine pasturesThomas, Horace R. (Virginia Tech, 1954)Estimates of feed produced by pasture were obtained from pasture investigations at the Tidewater Field Station from 1949 through 1953, Dry lot groups of pigs similar to those fed on pasture and fed similar rations were used to estimate total concentrates necessary for maintenance and gain of pigs on pasture. Feed production of each pasture was estimated from the difference between concentrates consumed by the pigs on that pasture and total concentrates for similar performance in dry lot. Estimates for 1949 and 1950 were based on the regression of feed consumption on average daily gain of pigs fed in dry lot. Weight of the animals was not considered in computing these estimates, In 1952 and 1953 the regression of feed consumption on weight was the basis for estimates when pigs were fed at the high level of nutrition, end feed required per pound of gain above maintenance for similar weight pigs was the basis for estimates, when pigs were fed at the low level of nutrition. Direct comparisons were made between pigs fed in dry lot and on pasture at the high level of nutrition, since feed consumption and weight were similar, This was not the case with pigs fed in dry lot and on pasture at the low level of nutrition. Feed consumption was the same but average daily gain differed significantly. Since the low level of nutrition provided slight gain for pigs in dry lot, it was necessary that this gain be subtracted from the total gain made by pigs on pasture. The net gain was assumed to be the direct result of the pasture, The feed required per pound of gain above maintenance was calculated and multiplied by the net gain (gain made from pasture), the product being an estimate of the feed replacement value of the pasture lot. Estimations were calculated on a per acre basis. A summary by years of the feed replaced by the pasture is shown in Table 15. This summary indicated that a more consistent estimate was obtained when weight of the animals was included in estimating expected feed consumption, Exceptions to this occurred in 1952 and 1953 when pigs were self-fed on ladino clover. In 1952, the estimated feed replacement value of the pasture, when pigs were provided supplement, was 584 pounds, while in 1953 the estimate was 93 pounds. When supplement was not included in the ration, the feed replaced by the pasture was 26 and 903 pounds for 1952 and 1953, respectively.
- Preliminary report on a study of minor element needs of growing swine in VirginiaBrooks, Coy C.; Thomas, Horace R. (Virginia Agricultural Experiment Station, 1958-10)Rates of gain and hemoglobins were lower in the pigs receiving no trace mineral. When the first ration was supplanted with copper the rate of gain increased to a level beyond that of pigs receiving trace mineral mixture.