Effects of dietary chromium picolinate supplementation on broiler growth performance: A meta-analysis

Abstract

Objective A meta-analysis was conducted to assess the effects of dietary chromium picolinate (CrPic) supplementation on broiler growth performance and to determine whether such effects are regulated by broiler strains, sex, environmental stress, or contextual factors including study area and years. Methods Eligible studies were identified by searching the Web of Science, Springer, Elsevier, ScienceDirect, Taylor & Francis Online databases. Weighted average differences with corresponding 95% confidence intervals were computed with a random-effects model. We performed subgroup analysis stratified by study area, published years, broiler strains and sex, and environmental stress. Publication bias was assessed with Egger’s test method. A total of 15 studies eligible for inclusion. Results The results indicated that CrPic supplementation significantly improved broiler growth performance and subgroup analysis confirmed this conclusion. We also found that Ross 308 or male broilers might be more sensitive to CrPic supplementation and showed better growth performance. A model was used to obtain the amount of chromium addition under the optimal growth performance, which suggested that the maximum value of average daily gain (ADG) was reached when chromium addition was 1810 μg/kg. The results of the sensitivity analysis showed low sensitivity and high stability of the meta-analysis. Conclusions CrPic supplementation had a positive effect on the growth performance of broilers, and this meta-analysis provides a more accurate value of chromium addition, which may be beneficial for the practice of the broiler industry.

Effects of the combined use of a probiotic and chromium methionine chelate on the functional state of broiler chickens

“…The combined use of a probiotic and a chelated form of Cr positively affected broiler chickens’ meat productivity, which was characterized by increases in the average daily gain of birds and body weight, resulting in an increased slaughtered carcass yield. The obtained results are consistent with a number of global studies in which the inclusion of various forms of Cr in feed contributed to an increase in body weight gain in animals and improvements in carcass characteristics and meat quality [ 22 – 25 ]. In particular, Arif et al .…”

Comparative effects of dietary functional nutrients on growth performance, meat quality, immune responses, and stress biomarkers in broiler chickens raised under heat stress conditions

“…Thus, it is difficult to identify the clear reason; however, it may be attributed to the variations in animals and environmental conditions among the experiments because the extent of heat stress is influenced by both animal (e.g., sex, age, and genetics) and environmental factors (e.g., stocking density, ambient temperature and humidity, duration and the extent of heat stress, and rearing facility) [ 5 , 13 ]. However, we found that all functional nutrients used in this experiment showed the reduction in stress responses measured based on feather CORT concentrations and blood H:L. Therefore, it may be suggested that dietary supplementation of 0.5% Gln, 500 ppb Cr picolinate, 250 mg/kg Vit C, 0.2% Bet, and 1.0% Tau is effective in reducing stress responses of broiler chickens under heat stress conditions; however, these anti-heat stress effects are unlikely to lead to a full recovery of decreased growth performance of broiler chickens raised under the current heat stress conditions [ 45 ].…”

“…Heat stress is well-known to depress immune systems because increased corticosteroid production and impaired immune organ development as caused by heat stress exerts a strong negative impact on immune systems [ 3 , 13 , 45 ]. Moreover, heat stress promotes oxidative stress, which increases lipid peroxidation of cell membrane of potential immune-related cells, leading to an impairment in immune responses [ 13 ].…”

“…unlikely to lead to a full recovery of decreased growth performance of broiler chickens raised under the current heat stress conditions [45].…”

Effects of dietary supplementation of chromium methionine chelate on growth performance, oxidative stress, hematological indices, and carcass traits of broiler chickens

“…The same effect was reported by Naghieh et al ( 2010 ) with 600 µg/kg Cr nicotinate, by Noori et al ( 2012 ) with Cr methionine from 200 to 800 ppb, and by Toghyani et al ( 2012 ) with 1500 ppb organic or inorganic Cr. Recently, Feng et al ( 2021 ) found that Cr picolinate supplementation had a positive effect on the growth performance of broilers. It is well recognized that chromium is essential for proper insulin functioning and also needed for normal protein, fat, and carbohydrate metabolism (Chowdhury et al, 2003 ).…”