mahdieh mahdizade; Omid Dayani; Reza Tahmasbi; mohammad mahdi sharifi hoseini; amin khezri; zohreh hajalizadeh
Volume 23, Issue 1 , March 2021, , Pages 61-71
Abstract
The effects of replacement of alfalfa hay and wheat straw with different levels of tarragon plant stalk (TPS) on feed intake, digestibility, microbial protein synthesis, and blood and rumen parameters of sheep were investigated using four Kermani male sheep (BW= 45±2 kg) with approximately three ...
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The effects of replacement of alfalfa hay and wheat straw with different levels of tarragon plant stalk (TPS) on feed intake, digestibility, microbial protein synthesis, and blood and rumen parameters of sheep were investigated using four Kermani male sheep (BW= 45±2 kg) with approximately three years old in a Latin square design with four 21-day periods. The experimental diets were: 1) control diet (without TPS), 2) diet containing 8% TPS, 3) diet containing 16% TPS and 4) diet containing 24% TPS (DM basis). Dry matter intake, and dietary digestibility of DM, OM and CP were not affected by feeding of TPS in the present research. The amounts of nitrogen intake, nitrogen excreted in the urine and feces, the amount and percentage of retained nitrogen, ruminal pH, ruminal concentrations of NH3-N and volatile fatty acids, and protozoa population were not affected by experimental diets. Feeding different levels of TPS had no effect on, microbial protein synthesis, and concentrations of blood glucose, total protein, urea nitrogen, triglyceride and cholesterol. Results of this study showed that tarragon plant stalk could be replaced with alfalfa hay and wheat straw up to 24% (DM basis) in sheep diet without any effect on ruminal fermentation, blood parameters or feed intake.
Mohammad Javad Khalifeh; Mohsen Sari; Mehdi Dehghan banadaky
Volume 22, Issue 4 , December 2020, , Pages 537-547
Abstract
This experiment was conducted to study the effects of inclusion of sucrose with or without calcium salts of fish oil on growth performance, ruminal fermentation and blood metabolites of fattening Holstein steers. Thirty sixth Holstein bull calves (269±57 kg body weight and 7 months of age) ...
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This experiment was conducted to study the effects of inclusion of sucrose with or without calcium salts of fish oil on growth performance, ruminal fermentation and blood metabolites of fattening Holstein steers. Thirty sixth Holstein bull calves (269±57 kg body weight and 7 months of age) were used in a completely randomized design with a 2×2 factorial arrangement for 128 days. Dietary treatments were 1- control, 2- calcium salts of fish oil (Ca-FO) (2.5 % DM), 3- sucrose (SU)(5% DM), 4- SU and Ca-FO. Average daily gain increased with added SU (P<0.05). Diets containing Ca-FOreduced dry matter intake (DMI) and using SU and Ca-FO together increased DMI in this group (P<0.05). A tendency for higher organic matter digestibility obsereved in bulls fed Ca-FO (P>0.05). An increase in ruminal acetate concentration observed using Ca-FO in the diet, although Lower propionate and higher acetate concentrations were observed in rumen fluid of SU provided bulls (P<0.05). Addition of SU increased ruminal fluid pH (P<0.05). Feeding steers with Ca-FO increased plasma concentration of triglyceride and cholesterol (P<0.05). The results of this study showed that replacing corn grain with sucrose could have stimulatory effect on dry matter intake in Ca-FO containing diet, which have positive effects on average daily gain of fattening steers.
Meysam Sherafat; meysam alijoo; Behzad Asadnezhad
Volume 22, Issue 2 , June 2020, , Pages 237-247
Abstract
The effect of flaxseed and soybean seed on the performance of Maque ewes during the transition period in a completely randomized design with four treatments and four replications and one ewe per replicate using 16 pregnant Maque ewes with average age of three years and weight (65 ± 2.4 kg) was ...
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The effect of flaxseed and soybean seed on the performance of Maque ewes during the transition period in a completely randomized design with four treatments and four replications and one ewe per replicate using 16 pregnant Maque ewes with average age of three years and weight (65 ± 2.4 kg) was investigated. Experimental treatments included: control diet (basal diet), diet containing 10% flaxseed; Contained 10% soybean seed and 50:50 dietary ratio of flaxseed and soybean seed. Experimental results showed no effect of treatments on feed intake of ewes before and after calving. Milk production of ewes fed flaxseed diets was higher (p<0.05) and ewes fed 50:50 diets containing flaxseed and soybean had the highest total serum protein concentration (p<0.05). Other serum metabolites were unaffected by experimental treatments. Rumen fluid valeric acid concentration was the highest in ewes fed diets containing soybean seed and soybean-flax seed mixture (p<0.05). Results of this experiment showed that using flaxseed and soybean seed up to 10% diet without adverse effect on feed intake improved ewes performance during the transition period and increased production in the early lactation period.