Crude glycerin in feedlot cattle diets and as a solvent in Maillard reaction processes intended for manufacturing value-added protein meals
dc.contributor.author | Schneider, Cody James | |
dc.date.accessioned | 2010-08-16T16:28:23Z | |
dc.date.available | 2010-08-16T16:28:23Z | |
dc.date.graduationmonth | August | en_US |
dc.date.issued | 2010-08-16T16:28:23Z | |
dc.date.published | 2010 | en_US |
dc.description.abstract | Two trials were conducted to evaluate effects of crude glycerin, a byproduct of the biodiesel industry, on feedlot performance, carcass characteristics, and diet digestibility in cattle. A third study was conducted to investigate the use of glycerin as a solvent in Maillard reaction processes used to manufacture value added protein meal. In trial 1, crossbred yearling heifers were fed low levels of glycerin (0, 0.5, or 2% of diet DM) in corn finishing diets, or diets that combined corn with soybean hulls and wet distiller’s grains (0 or 2% glycerin). Results indicated that feeding glycerin decreased DMI (P = 0.04), and feeding byproducts increased DMI (P < 0.01) when compared to control without byproducts or glycerin. Feeding byproducts or glycerin decreased the percentage of carcasses that graded USDA Choice or higher (P < 0.05). Other live performance traits and carcass characteristics were similar across treatments. Trial 2 evaluated effects of crude glycerin on growth performance and diet digestibility in heifers fed high forage growing diets. Treatments consisted of 0, 4, or 8% crude glycerin added to growing diets containing corn silage (60% of DM) and wet corn gluten feed. Apparent total tract digestibilities were calculated from total fecal collections. Adding glycerin linearly increased (P = 0.01) feed efficiency over the entire feeding period, and linearly decreased (P = 0.02) DMI for a portion of the feeding period. No other effects of glycerin on animal growth performance were observed. Digestibility measurements indicated that glycerin decreased DM, OM, and NDF intakes linearly (P < 0.01), but did not affect fecal outputs of DM, OM, or NDF. Apparent total tract digestibilities of DM, OM, and NDF therefore decreased linearly (P < 0.01) with increasing levels of glycerin. The third trial involved several experiments, which were conducted to determine if glycerol could be used as a solvent in processes designed to facilitate non-enzymatic browning of protein meals. Results indicated that glycerol may serve as a more suitable solvent for browning processes than water because its chemical and physical properties may enhance browning processes, increase process efficiency, and yield products with superior resistance to microbial degradation. | en_US |
dc.description.advisor | James S. Drouillard | en_US |
dc.description.degree | Master of Science | en_US |
dc.description.department | Department of Animal Sciences and Industry | en_US |
dc.description.level | Masters | en_US |
dc.description.sponsorship | Kansas Soybean Commission; Kansas State University Center for Sustainable Energy | en_US |
dc.identifier.uri | http://hdl.handle.net/2097/4648 | |
dc.language.iso | en_US | en_US |
dc.publisher | Kansas State University | en |
dc.subject | Feedlot Cattle | en_US |
dc.subject | Glycerin | en_US |
dc.subject.umi | Agriculture, Animal Culture and Nutrition (0475) | en_US |
dc.title | Crude glycerin in feedlot cattle diets and as a solvent in Maillard reaction processes intended for manufacturing value-added protein meals | en_US |
dc.type | Thesis | en_US |