gholamhosein Irajian; hamid Amanlou; Asadollah Teimouri Yansari; hamid reza mirzaie almouti; hormoz mansouri
Volume 19, Issue 4 , March 2018, , Pages 803-818
Abstract
This study investigated the effects of alfalfa hay and corn silage particle size on chewing activity, passage rate of solid fraction in the rumen and performance of pregnant ewes. The experiment has been done using 30 ewes (35±0.4 months) in a completely randomized design with five treatments ...
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This study investigated the effects of alfalfa hay and corn silage particle size on chewing activity, passage rate of solid fraction in the rumen and performance of pregnant ewes. The experiment has been done using 30 ewes (35±0.4 months) in a completely randomized design with five treatments and six replicates during a 30 days period. Forages were including alfalfa hay (three sizes, geometric mean 2.42, 4.91 and 7.04 mm) and corn silage (two sizes, geometric mean 3.36 and 7.73 mm). Treatments including fine particles of alfalfa hay and corn silage had the least physical effectiveness factor (pef > 8) and pef values (pef >8, pef >1.18) were reduced with decrease in particle size (p<0.05). Geometric mean also decreased (p<0.05). Following reduction in particle size of forages, passage rate of solid fraction in the rumen and terminal part of digestive tract (TDT) were increased (p<0.05) and retention time in the rumen, TDT and total retention time were decreased (p<0.05). Feed intake time, chewing activity and total chewing time were not affected (p<0.05). Results showed that it is necessary to consider the appropriate balance between particle size as a representative of the physical and chemical characteristics of the diet. The treatment of alfalfa fine particle size plus corn silage long particle size in most cases showed better results, and it seems that this treatment has provided a more appropriate balance in the diet for feeding ewes. Therefore, in preparing the pregnant ewes’ diet, we can expect better performance by considering the particle size.
hamid amanlou; abolfazl zali
Volume 19, Issue 2 , August 2017, , Pages 337-348
Abstract
The aim of this study was to evaluate the effects of Pomegranate seed pulp (PSP) containing long-chain fatty acids with L-carnitine (LC) on performance and carcass traits of thirty two Mahabadi male kids. Experimental diets were 1) diet without PSP and LC 2) diet with 10% PSP Kg/DMI and without ...
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The aim of this study was to evaluate the effects of Pomegranate seed pulp (PSP) containing long-chain fatty acids with L-carnitine (LC) on performance and carcass traits of thirty two Mahabadi male kids. Experimental diets were 1) diet without PSP and LC 2) diet with 10% PSP Kg/DMI and without LC 3) diet without PSP and with 300ppm LC Kg/DMI and 4) diet with 10% PSP and 300ppm LC Kg/DMI. Kids were slaughtered at the end of study and carcass characteristics were measured. Addition of PSP and LC in diet decreased kidney fat (P<0.05). The kids fed with PSP and LC supplement had higher fat digestibility than other treatments (P<0.05). Furthermore, the use of PSP in the diet decreased the feed cost per Kg of hot carcass (P=0.05). The results of this study indicated that replacing a part of dietary cereal grains with PSP and LC supplement decreased kidney fat. Also, the simultaneous use of LC and PSP increased apparent digestibility of fat, and showed numerically higher performance. According to the results of this study, the PSP can be used as an economical byproduct without negative effects on performance, and along with LC in the diet of kids it will reduce kidney fat as well.