12146

11132

كارشناسي ارشد

علوم دامي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1395

يازده، 68ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

ابراهيم قاسمي، محمد خوروش

مسيح الله فروزمند، غلامرضا شادنوش

مسعود عليخاني، مهدي كديور

1395/11/24

كتابنامه

كشاورزي

مهندسي كشاورزي

ID11132

69 Effect of Partial Replacement of Forage with Treated Straw on Performance of Growing Lambs Aazam Mohammadimehr azam mohammadimehr@gmail com January 17 2017 Department of Animal Sciences College of Agriculture Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor E Ghasemi@cc iut ac irAbstractThe objective of this study was to evaluate the effect of partial replacement of forage with treated strawon performance chewing activity rumen fermentation parameters digestibility blood parameters andcarcass characteristics of fattening lambs Twenty three 3 to 4 month age and 28 kg weight average out Afshari growing male lambs were used in a completely randomized design in 104 days period 20 d ofadaptation followed by 84 d fattening Forage to concentration ratio was 20 80 Treatments were 1 control without treated straw 2 one third of forages as treated straw 3 two third of forages as treatedstraw At the end of fattening lambs initially weighing the slaughter and hot carcass weight fat weightand carcass weight offal were measured The results of this study show Treated Straw increased theproportion of the particles retained on the top sieve of the PSPS 8 mm but no effect on third sieve 1 18 mm DMI lambs fed with control diet one third and two third treated straw respectively 1574 1538 and 1467 were gr d experimental diets were not that impressed but it was a significant linear p 0 05 Average daily gain weight ADG during fattening lambs between significantly affected by dietswere tested for quadratic p 0 02 so that the maximum weight of one third treated straw 330 g d andlowest among treatments related to treatment including two thirds of treated straw 285 gr d the feedconversion ratio for second degree tend to be significantly influenced was the replacement level p 0 08 so that the lowest conversion rate to treatment was a third straw While the digestibility of drymatter organic matter neutral detergent fiber acid detergent fiber crude protein and ash are treated strawin the ration increased linearly with increasing replacement Eating ruminating and total chewing time forthe control and one third treated straw was significantly more than two thirds treated straw treatment There was no significant difference between rumen fluid PH among treatments and acetate ammonianitrogen concentration in treatment 3 was higher than other two treatments Total protein and BUN intreatment 2 was higher than other treatments and glucose cholesterol triglycerides aspartateaminotransferase and alanine aminotransferase were not significantly different between treatments Although lowest carcass weight and abdominal fat tail and highest weight tail fat in a third treatment wasobserved but negative effect of treated straw in treatment 2 was not observed on performance and carcasscharacteristics Replace two thirds of alfalfa hay treated straw with no negative impact on theperformance of male lambs Afshari However the best performance and feed efficiency by replacing one third straw was treated Keywords Treated Straw Alfalfa hay Performance Fattening lambs Carcasscharacteristics

ابراهيم قاسمي، محمد خوروش

مسيح الله فروزمند، غلامرضا شادنوش

مسعود عليخاني، مهدي كديور