Hassan Lakzaie; Farzad Ghanbari; Javad Bayat Kouhsar; Ashoor Mohammad Gharehbash
Volume 22, Issue 1 , March 2020, , Pages 173-185
Abstract
This research was conducted in order to compare the blood parameters and fattening performance of Zel and Dalagh breeds male lambs (three to four months old), and their crossbred with Romanov in different thermal-humidity conditions. Fattening trial was conducted in Gonbad kavous with four ...
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This research was conducted in order to compare the blood parameters and fattening performance of Zel and Dalagh breeds male lambs (three to four months old), and their crossbred with Romanov in different thermal-humidity conditions. Fattening trial was conducted in Gonbad kavous with four treatments and six replicates for 84 days from mid-August to early November. Based on the temperature-humiity index (THI), the lambs were under very severe and severe of heat stress up to 8th weeks of trial, followed by non-stress conditions (THI index of 25.6 and above that, 23.3 up to less than 25.6 and less than 22.2 respectively). In the very severe heat stress condition, the performance of treatments was the same. In the severe heat stress, the performance of Dallagh lambs and their crossbred with Romanov was better than Zel and Zel-Romanov crossbred (P<0.05). In un-stress conditions, performance traits in Zel Romanov crossbred was lower than other treatments (P<0.05). Glucose and cholesterol concentration were lower when the lambs were in heat stress condition than normal time (P<0.05). Unlike, blood urea concentration in heat stress condition was higher than lack of stress time (P<0.05). Concentrations of nonstratified fatty acids (NEFA) in the middle period of experiment, during severe heat stress, were higher than those of very severe and nonstress periods. In whole of fattening trial period, all of the breeds had lower performance than expected, indicating the effects of heat stress on them. Totally, Dalagh breed lams had better fattening performance than Zel and their crossbred with Romanov, especially under very severe heat stress condition.
Aynaz Aslaniyan; Farzad Ghanbari2; Javad Bayat Kouhsar; Behrouz Karimi Shahraki
Volume 18, Issue 2 , June 2016, , Pages 235-248
Abstract
This research was conducted to determine the effect of gamma ray (GR) (100 and 150 kGy), sodium hydroxide (50 g/kg DM) and calcium oxide (160 g/kg DM) on gas production parameters and in vitro digestibility of soybean straw. All treatments, except for the gamma ray (100 and 150 kGy) did not have gas ...
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This research was conducted to determine the effect of gamma ray (GR) (100 and 150 kGy), sodium hydroxide (50 g/kg DM) and calcium oxide (160 g/kg DM) on gas production parameters and in vitro digestibility of soybean straw. All treatments, except for the gamma ray (100 and 150 kGy) did not have gas production up to 4 hours after incubation and there was a lag time. From 8 to 96 hours of incubation, the highest gas production was observed in sodium hydroxide + gamma ray (100 and 150 kGy) treatments (P< 0.05). Processing had no effect on gas production rate (P>0.05), but increased gas production potential (b) (P<0.05). The highest amount for b fraction was observed in sodium hydroxide + GR (100 and 150 kGy) treatment. Organic matter digestibility (OMD), metabolizable energy (ME), net energy (NE) and short chain fatty acids (SCFA) increased by processing (P<0.05). The highest increase was observed for sodium hydroxide (100 and 150 kGy). In vitro digestibility of the dry matter (DM) and organic matter (OM) was increased by GR, sodium hydroxide, and their combination (P<0.05). However, treatments with calcium oxide did not affect these traits. Except for GR at doses of 100 and 150 kGy, the other treatments reduced ammoniacal nitrogen (NH3-N) (P<0.05). Microbial mass production after 24 hours incubation showed decrease in calcium oxide and calcium oxide + GR treatments (P<0.05). Based on the results of this research, nutritional value of soybean straw improves with GR and sodium hydroxide treatments.
Farzad Ghanbari; Taghi Ghoorchi; Parvin Shawrang; Hormoz Mansouri; Nour Mohammad Torbatinejad
Volume 17, Issue 1 , April 2015, , Pages 83-93
Abstract
This study was conducted to investigate the effects of doses of 25, 50 and 75 kGy of gamma ray (GR) and electron beam (EB) ionizing radiations on ruminal disappearance of amino acids (AAs) and protein subunits of canola meal (CM). The nylon bag technique was used for degradability trial. Three ruminally ...
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This study was conducted to investigate the effects of doses of 25, 50 and 75 kGy of gamma ray (GR) and electron beam (EB) ionizing radiations on ruminal disappearance of amino acids (AAs) and protein subunits of canola meal (CM). The nylon bag technique was used for degradability trial. Three ruminally fistulated Taleshi bulls were used for this aim. The disappearance trends of protein subunits for protein meal samples were determined using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Irradiation decreased ruminal degradability of AAs (P<0.05). In this case, except for serine, tyrosine and glutamate, the effect of GR in reducing AAs degradability was more than the EB. Electrophoresis analysis identified the presence of cruciferin with four subunits in CM. In unirradiated CM, all four protein subunits of cruciferin were degraded after 8 h of rumen incubation. Doses of 25, 50 and 75 kGy of EB and GR preserved the protein subunits of cruciferin up to 16, 24 and 48 h, respectively. It can be concluded that processing with ionizing radiation of EB and GR decreases ruminal degradation of CM protein subunits of cruciferin and AAs. The effect of GR in reducing ruminal degradation of CM proteins is more than EB.