Animal and poultry nutrition
Rademan Bakhtiyari; yadollah chashnidel; asadollah Teimouri Yansari
Abstract
This study was conducted to investigate the effects of different sources of organic and inorganic selenium supplements in crossbred Zel lambs. Twenty-five male lambs aged 4-5 months and with average body weight (32 ± 1.5 kg) were assigned to 5 treatments with 5 repetitions, as a completely randomized ...
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This study was conducted to investigate the effects of different sources of organic and inorganic selenium supplements in crossbred Zel lambs. Twenty-five male lambs aged 4-5 months and with average body weight (32 ± 1.5 kg) were assigned to 5 treatments with 5 repetitions, as a completely randomized design for 84 days. The experimental treatments were:1) basal diet without selenium supplement (control); 2) basal diet + 0.5 mg Se/kg DM as selenium glycine; 3) basal diet + 0.5 mg Se/kg DM as selenium methionine; 4) basal diet + 0.5 mg Se/kg DM as selenium cysteine, and 5) basal diet + 0.5 mg Se/kg DM as sodium selenite. TPlasma selenium concentration increased significantly in all treatments supplemented with selenium compared to that in the control group. In the treatments containing selenium methionine and selenium cysteine supplements, the concentration of triiodothyronine hormone increased significantly compared with the treatments containing inorganic selenium and the control group (P<0.05). In addition, the serum concentration of tetraiodothyronine decreased in all lambs receiving selenium supplements compared to that in the control group (P<0.05), and the tetraiodothyronine/triiodothyronine ratio was lower in the treatments containing organic selenium supplement than in the control group (P<0.05). In conclusion, the results of this research show that the addition of 0.5 mg Se/kg DM from both organic and inorganic sources meets the needs of growing lambs.
zahra tahami; Behrouz Dastar; Ehsan Oskoueian; Seyed reza hashemi
Abstract
This study was performed to investigate the effect of organic and inorganic selenium supplementation on laying hens' performance, quality traits and peroxidation of egg yolks and whites. The experiment was carried out in a completely randomized design with 300 laying hens (W-36) from 23 to 35 weeks of ...
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This study was performed to investigate the effect of organic and inorganic selenium supplementation on laying hens' performance, quality traits and peroxidation of egg yolks and whites. The experiment was carried out in a completely randomized design with 300 laying hens (W-36) from 23 to 35 weeks of age with 5 treatments and 6 replications and 10 laying hens in each replication. Experimental treatments include: treatment one or control (basic diet without selenium), The second treatment of 0.5 selenite-sodium (base diet+0.5 mg/kg selenite-sodium), the third treatment selenite-sodium 1 (basic diet+1mg/kg selenite-sodium), the fourth treatment selenium-methionine 0.5 (basal diet + 0.5 mg/kg seleno-methionine) and the fifth treatment was seleno-methionine 1 (basal diet +1 mg/kg seleno-methionine). The results showed that experimental treatments had no significant effect on egg weight, weight mass, production percentage, feed intake, feed conversion ratio and egg yolk and egg white characteristics (P<0.05). Peroxidation of egg yolk and egg white fats in 1 mg/kg seleno-methionine treatment showed the lowest rate compared to other experimental treatments (P<0.05). The results of the present study showed that among the sources of selenium, 1 mg/kg of selenium-methionine more effectively reduced the peroxidation of fats and increased antioxidant activity.
