Download or read book Influence of Diet and Sex on the Performance of Three Breeding Groups of Pigs Marketed at Three Different Weights written by Peter Joseph Skitsko and published by . This book was released on 1969 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were designed to study the influence of high and low energy diets under conditions of limit-feeding imposed by allowing pigs access to feed for two, 1 hr periods per day on the performance of three breeding groups of pigs marketed at three different weights. The diets contained approximately 3650 and 2750 kcal digestible energy per kg and had similar ratios of crude protein, lysine, methionine and cystine and calcium to digestible energy. Performance of the pigs was based on average daily gain, average daily feed consumption, feed conversion, digestibility of energy and nitrogen, nitrogen retention and carcass characteristics. A 2x2x2x3x3 factorial design consisting of two replicates, two diets, two sexes, three breeding groups and three market weights was used in these studies. In addition a Ix2x2x3 factorial experiment consisting of one breeding group, two diets, two sexes and three market weights was used to study the aforementioned parameters under self-feeding conditions. The high energy diet significantly improved average daily gain and feed conversion as compared to the low energy diet. However, when converted to the basis of digestible energy in Experiment 1, there were no differences in energetic efficiency between the pigs fed the high and low energy diets. Males had higher average daily feed consumption and, when the high energy diet was fed they had higher average daily gain than females. The males were less efficient converters of feed to gain when the low energy diet was fed but no differences in feed conversion existed between sexes when the high energy diet was fed. A significant difference between breeding groups was found for average daily gain and feed conversion; the Duroc and Hampshire-sired groups had a higher average daily gain and were more efficient converters of feed to gain than the Yorkshire-sired group. The digestibility of dietary energy and nitrogen was not affected by sex or breeding group. Nitrogen digestibility was increased when the high energy diet was fed. Nitrogen retention was not affected by diet, sex or breeding group. Carcasses of pigs receiving the high energy diet were fatter as evidenced by higher dressing percentages, greater total backfat thickness, decreased ratio of loin area to backfat thickness, lean in the ham face, ham as a percent of carcass and Record of Performance (ROP) score. Females were superior to the males in all carcass measurements except dressing percentage where differences were not significant. The Yorkshire-sired group were inferior to the Duroc and Hampshire-sired groups in dressing percentage and loin area but were superior in carcass length. Market weight had a significant effect on carcass characteristics. Dressing percentage, carcass length and loin area were improved with increases in carcass weight while the total backfat thickness, ham as a percent of carcass and ROP score were inferior with increases in carcass weight. Feeding system had significant effects on average daily gain, average daily feed consumption and feed conversion. Self-fed pigs had higher average daily gains and average daily feed consumption but were less efficient converters of feed to gain. Carcassses of self-fed pigs were inferior to those of limit-fed pigs in total backfat thickness, loin area, ratio of loin area to backfat thickness and ROP score.

Download or read book Canadian Theses written by National Library of Canada and published by . This book was released on 1972 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feed efficiency in swine written by John F. Patience and published by Springer Science & Business Media. This book was released on 2012-10-15 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Feed efficiency in swine' has been prepared as a comprehensive treatise on the current state of our understanding of this topic which is so important to the pork industry. Each chapter is written by international authorities who understand both the science and application of their topic area. The book provides detailed insight into the many factors affecting feed efficiency, ranging from diet processing to herd health, from nutrition to physiology and from day-to-day barn management to the adoption of advanced technologies. The authors explain such practical aspects as the challenge of interpreting feed efficiency information obtained on farm or the role of liquid feeding. The authors also delve into more scientific topics such as amino acid or energy metabolism or animal physiology. This book is written for people who have a technical interest in pork production, including nutritionists, geneticists, farm management specialists, veterinarians, other academics and, of course, pork producers.

Download or read book Nutrient Requirements of Swine written by and published by . This book was released on 1968 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nutrient Requirements of Swine written by National Research Council (U.S.). Subcommittee on Swine Nutrition and published by National Academy Press. This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrient requirements: energy, protein and aminoacids, minerals, vitamins, water. Antimicrobial feed additives. Nutrient deficiencies and excesses. Formulating diets. Tables nutrient requirementes. Composition of feeds and mineral sources.

Download or read book Research Bulletin written by Satya Narayan Pani and published by . This book was released on 1972 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Bulletin written by Basil Leon McIntyre and published by . This book was released on 1972 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Bulletin written by University of Missouri--Columbia. Agricultural Experiment Station and published by . This book was released on 1972 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Animal Science written by and published by . This book was released on 1982 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Swine Research written by United States. Cooperative State Research Service. Current Research Information System and published by . This book was released on 1983 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nutrient Requirements for Domestic Animals written by National Research Council (U.S.). Committee on Animal Nutrition and published by . This book was released on 1949 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Agricultural Index written by and published by . This book was released on 1990 with total page 2408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genotype X Environment Interactions in Animals written by Basil Leon McIntyre and published by . This book was released on 1972 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pig American written by and published by . This book was released on 1982 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Branch report written by Canada. Agriculture Canada. Research Branch and published by . This book was released on 1987 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1991-04 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Book of Abstracts of the 71st Annual Meeting of the European Federation of Animal Science written by Scientific Committee and published by BRILL. This book was released on 2023-09-14 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Book of Abstracts is the main publication of the 71st Annual Meeting of the European Federation of Animal Science (EAAP). It contains abstracts of the invited papers and contributed presentations of the sessions of EAAP's eleven Commissions: Animal Genetics, Animal Nutrition, Animal Management and Health, Animal Physiology, Cattle Production, Sheep and Goat Production, Pig Production, Horse Production and Livestock Farming Systems, Insects and Precision Livestock Farming.