Effects of Chromium Picolinate Supplementation on Growth Performance, Small Intestine Morphology and Antioxidant Status in Ducks Under Heat Stress Conditions

Abstract

LI, R.; ZHOU, Y.; LI, Y.; GUO, L; ZHANG, Y. & QI, Z.Effects of chromium picolinate supplementation on growth performance, small intestine morphology and antioxidant status in ducks under heat stress conditions. Int. J. Morphol., 36(1):226-234, 2018. SUMMARY:The experiment was conducted to evaluate the effects of dietary supplemental chromium (Cr) on growth performance, meat quality, intestinal morphology, mucosa Hsp70 mRNA expression and antioxidant status of ducks reared under heat stress conditions. All ducks were randomly divided into three treatment groups, respectively, control group (Control, 23 ± 2 °C), heat stress group (HS, 32 ±2 °C), Cr picolinate group (CrPic, 32 ± 2 °C, 0.2 mg Cr/kg). Feed and distilled-deionized water were available ad libitum for an experimental phase of 35 days. Samples were collected on the day 14, 21 and 35 to determine biological and hematological values. Results showed that heat stress or dietary supplemental Cr both didn't have distinct influence on growth performance (P>0.05), compared to controls. Ducks fed 0.2 mg Cr/kg diet had greater ultimate pH (pHu)(P<0.05) than HS group. At day 14, the ratio of villus height to crypt depth (V/C) in CrPic group significantly increased (P<0.05) than that of HS group in jejunum. Heat stress remarkably increased Hsp70 mRNA expression in jejunum compared with controls (P<0.05). While the expression of Hsp70 mRNA in CrPic group was significantly decreased compared with HS (P<0.05). At day 21, the V/C of ileum in CrPic group significantly increased compared with HS group (P<0.05). Serum SOD levels in CrPic group were significantly higher than those in HS group (P<0.05). At day 35, Hsp70 mRNA expression and serum T-SOD levels in CrPic group significantly increased compared with controls (P<0.05). T-AOC in HS group significantly decreased compared with controls (P<0.05). Results indicate that dietary Cr supplementation doesn't influence ducks' growth performance, but has a positive effect on meat quality, small intestine morphology, also regulates Hsp70 mRNA expression under heat stress conditions, and enhances the antioxidant status.

Effect of organic Chromium on productive, physiological rates, and ameliorating oxidative stress induced of growing Japanese quail under high ambient temperature

“…Our results have confirmed that adding CrMet can increase antioxidant properties of birds and reduce oxidative destruction affected by HS. In this respect, Li et al (2018) found that at fourteen-day dietary supplementation of Cr can significantly reduce serum MDA degree compared with HS group. At twenty-one-day, SOD levels in Cr-Pic group were significantly greater than those in HS group.…”

Supplemental chromium-loaded chitosan nanoparticles affect growth, serum metabolites and intestinal histology in broilers

“…The absorption of nutrients across the intestine is increased greatly by the intestinal villi and microvilli (Awad et al, 2009). Intestinal health and integrity are associated with villus height, width, surface area, and villus height to crypt depth ratio, which are the important indicators of intestinal digestion and absorption (Li et al, 2018). The literature about the effects of chromium on intestinal histology in broilers is scarce.…”

“…Jejunal villus height to crypt depth ratio of birds supplemented with 800 µg Cr-CNPs/kg was found to be higher (P <0.001) compared with the 1200 µg Cr-CNPs/kg supplemented group. Li et al (2018) conducted a study to observe the effects of Cr-picolinate in duck reared under heat stress and found that Cr-picolinate did not affect the villus height and crypt depth in duodenum, jejunum, and ileum at days 14, 21 and 35. However, the villus height to crypt depth ratio was increased significantly with Cr-picolinate supplementation in the jejunum and ileum.…”

Effect of Different Sources of Chromium on Productive Performance of Japanese Quail Under Heat Stress Conditions

“…Our results have confirmed that adding Cr can improve antioxidant properties of poultry and alleviate oxidative damage caused by HS. In this respect, Li et al (2018) who found that at 14 th day dietary supplementation of Cr could significantly decrease serum MDA level compared with HS group. At 21 th day, serum SOD levels in Cr-Pic group were significantly higher than those in HS group.…”