Comparative Effects of Different Dietary Selenium Sources on Productive Performance, Antioxidative Properties And Immunity in Local Laying Hens Exposed to High Ambient Temperature

Abstract

The present study was carried out to compare the efficiency of different selenium (Se) sources [sodium selenite (SS), Se enriched yeast (Sel-Plex) and Nano-Se] on productive performance, lipid peroxidation, antioxidative status and immunity function of local chickens strain exposed to summer condition (high ambient temperature). One hundred and twenty birds, were randomly divided into 4 treatments: (1) control (basal diet without any supplementation of selenium), (2) SS (basal diet + 0.3 mg Se as SS / kg diet); (3) basal diet + 0.3 mg Nano-Se/ kg diet (Nano-Se); and (4) basal diet + 0.3 mg organic Se/ kg diet (Sel-Plex). The experimental diets are given to birds from 30 to 42 wk of age. Under hyperthermia, dietary 0.3 ppm Sel-Plex or Nano-Se improved feed conversion (g feed/g egg mass), egg production percentage and egg mass (g/d) (P < 0.05). Supplementing diets with Nano-Se increased total protein and globulin content compared with control diet. While, addition different sources of selenium significantly decreased malondialdehyde (MDA) content compared with treat (1) diet. Interestingly, under rise ambient temperature, the inclusion of 0.3 ppm Sel-Plex or Nano-Se in the chikens diet significantly enhanced the antioxidant enzyme (GSH-Px) activity being greater than 2-folds of the controls. Chickens fed diet supplemented with Sel-Plex or Nano-Se showed about 1.5-folds increase in seminal plasma (GSH-Px) compared with control diet. Dietary 0.3 ppm Sel-Plex or Nano-Se had a positive significant effect on Phagocytic activity (PA) and Phagocytic index (PI) on high ambient temperature. In conclusion, dietary 0.3 ppm organic Se or Nano-Se enhanced productive performance, antioxidative properties and immunity in chickens reared under heat stress conditions.

Effects of Dietary Biological or Chemical-Synthesized Nano-Selenium Supplementation on Growing Rabbits Exposed to Thermal Stress

“…In contrast with our results, previous studies have indicated that dietary Se supplementation did not have any influence on the overall broiler performance [34,38]. Additionally, El-Deep et al [34] indicated that the addition of nano-Se (0.3 mg/kg) into laying hens' diet did not affect the FI during high environmental temperatures.…”

“…In contrast with our results, previous studies have indicated that dietary Se supplementation did not have any influence on the overall broiler performance [34,38]. Additionally, El-Deep et al [34] indicated that the addition of nano-Se (0.3 mg/kg) into laying hens' diet did not affect the FI during high environmental temperatures. This might confirm the ability of nano-Se, especially that which is synthesized by biosynthesis method at low levels (25 or 50 mg/kg), to improve the growth performance of growing rabbits in a hot environment through increasing the LBW, BWG, FI, and FCR.…”

“…The present research shows that feeding different sources of nano-Se was useful in improving LBW, BWG, FI, and FCR in heat-stressed rabbits compared to the control. Several studies confirmed the ability of a nano-Se diet (0.2-0.3 mg/kg) to remarkably improve the BWG [33] and FCR [33,34] in poultry under heat stress conditions. Similar improvement in growth performance was obtained by Shi et al [31], who concluded that diets supplemented with nano-Se resulted in enhanced final body weight, BWG, and FCR in guangxi yellow chicken.…”

“…In our study, nano-Se supplementation in rabbit diets enhanced the antioxidant activities by significantly increasing the activities of GSH and CAT compared to those in the heat stress group, and significantly reduced both NO and MDA levels in the nano-Se treated groups (BIO25, BIO50, or CH25) compared to other groups. It has been reported that dietary inclusion of nano-Se (0.2-0.3 mg/kg) in poultry significantly improved the activity of reduced glutathione (GSH-P) in the serum [34]. Consequently, the immunological activities and protective role of Se, which have been enhanced by the nano-Se addition definitely could alleviate the negative influences on heat-stressed laying hens.…”

Effects of Dietary Nano-Zinc and Nano-Selenium Addition on Productive and Physiological Performance of Growing Rabbits at Fattening Period

“…Shunyi et al (2016) reported that blood biochemistry of rabbits, including concentrations of alanine amino transferase (ALT) and aspartate amino transferase (AST) were not significantly affected by supplementation of nano-selenium or sodium selenite. El-Deep et al (2017) found that the birds fed diet supplemented with nano-Se recorded lower value of AST enzyme compared with control group. Also, Selim et al (2015) found that increasing supplemental nano-Se level from 0.15 to 0.30 ppm in broiler diets resulted in an increase in plasma creatinine level compared with the control group without any significant differences.…”