Effects of dietary Lycium barbarum polysaccharides on growth performance, digestive enzyme activities, antioxidant status, and immunity of broiler chickens

There is increasing evidence showing that moderate amounts of insoluble dietary fiber can improve nutrient utilization by positively influencing the physiology of the gastrointestinal tract. The present study was conducted to investigate the effects of wheat bran as a source of insoluble fiber on nutrient digestibility, serum antioxidant status, gastrointestinal development, digestive enzyme activities and intestinal morphology in broiler chickens. A total of 96 one-day-old male Arbor Acre broiler chickens were assigned to two treatments with six replicate cages per treatment and eight birds per replicate for 42 d. Dietary treatments consisted of the control group (CON, control diet) and wheat bran group (WB, 30 g/kg wheat bran). Inclusion of WB increased (p < 0.05) the digestibility of dry matter, organic matter, gross energy and crude protein on Day 42. Birds fed WB had lower (p < 0.05) serum total cholesterol concentration on Day 21, and lower (p < 0.05) serum concentrations of low-density lipoprotein, total cholesterol and total triglyceride on Day 42. Inclusion of WB increased (p < 0.05) serum glutathione peroxidase activity on Day 21 and superoxide dismutase activity on Day 42, but tended (p = 0.07) to decrease serum malondialdehyde concentration on Day 21, and significantly decreased (p < 0.05) serum malondialdehyde concentration on Day 42. Birds fed WB had a greater (p < 0.05) relative weight of gizzard on both Day 21 and 42. Inclusion of WB increased (p < 0.05) activities of amylase and trypsin in pancreas and jejunal mucosa on Day 21, and increased (p < 0.05) amylase activity in pancreas and jejunal mucosa. Birds fed WB had greater (p < 0.05) villus height and villus height to crypt depth ratio in jejunum and ileum on Day 42. In conclusion, supplementation of 30 g/kg WB enhanced nutrient digestibility by improving antioxidant status, gizzard development, intestinal digestive enzyme activities and morphology of broilers.

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Effect of Dietary Supplementation of Inulin on Growth Performance, Digestion Enzyme Activities and Antioxidant Status of Rainbow Trout (Oncorhynchus mykiss)

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v7i9.1344-1353.2581 ◽

2019 ◽

Vol 7 (9) ◽

pp. 1344 ◽

Cited By ~ 1

Author(s):

Arzu Özlüer Hunt ◽

Mükereem Çetinkaya ◽

Ferbal Özkan Yılmaz ◽

Metin Yıldırım ◽

Mehmet Berkoz ◽

...

Keyword(s):

Rainbow Trout ◽

Growth Performance ◽

Enzyme Activities ◽

Antioxidant Status ◽

Digestive Enzyme ◽

Conversion Ratio ◽

Control Group ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Final Weight ◽

Digestive Enzyme Activities

The present study investigated the effects of the prebiotic inulin on the growth parameters, digestive enzyme activities and antioxidant status of rainbow trout (Oncorhynchus mykiss). After acclimation, fish (34±0.22 g; n = 135) were assigned into 9 tanks (15 fish per tank) and triplicate groups were fed a control diet (G-0) or diets containing 1% (G-1) or 2% (G-2) inulin. At the end of the trial (8 weeks), growth factors (final weight, weight gain, specific growth rate (SGR), food conversion ratio (FCR), protein efficiency ratio (PER), Economic conversion ratio (ECR), digestive enzyme activities (pepsin, trypsin, amylase and lipase) and antioxidant status superoxide dismutase (SOD), catalase (CAT) and malondialdehyde (MDA) level of liver tissue were assessed. At the end of the study highest survival rate was observed in the fish fed with 1% G-1 inulin group. Similarly, digestive enzyme activities were significantly higher dietary G-1 group. Subsequently, elevated growth performance (final weight, SGR and FCR) was observed in trout fed with 1% compared to the control group. The effect of the dietary inulin on digestion was partly observed by assaying the activity of pepsin, intestinal amylase, trypsin and lipase. Apart from pepsin activity, results indicated that dietary supplementation of inulin is beneficial and may also have differential effects upon digestive enzyme activities. Antioxidant enzyme activity of SOD and CAT in liver tissue was generally higher in the supplemented inulin diets than in the control and significantly higher in the 1% inulin group. A significant decrease in MDA level of tissue was observed in all inulin supplemented groups when compared to the control group. These results indicate that inulin be considered as a beneficial dietary supplement for growth performance, digestive enzyme activities and antioxidant status of rainbow trout.

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