Effects of Dietary Manganese Proteinate or Chromium Picolinate Supplementation on Plasma Insulin, Glucagon, Glucose and Serum Lipids in Broiler Chickens Reared Under Thermoneutral or Heat Stress Conditions.

2002 ◽  
Vol 1 (5) ◽  
pp. 145-149 ◽  
Author(s):  
J. S. Sands . ◽  
M. O. Smith .
Keyword(s):  
Heat Stress ◽  
Broiler Chickens ◽  
Serum Lipids ◽  
Plasma Insulin ◽  
Stress Conditions ◽  
Chromium Picolinate

scholarly journals Effects of Fennel Seed Powder Supplementation on Growth Performance, Carcass Characteristics, Meat Quality, and Economic Efficiency of Broilers under Thermoneutral and Chronic Heat Stress Conditions

Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 206 ◽  
Author(s):  
Ahmed A. AL-Sagan ◽  
Shady Khalil ◽  
Elsayed O. S. Hussein ◽  
Youssef A. Attia
Keyword(s):  
Heat Stress ◽  
Meat Quality ◽  
Broiler Chickens ◽  
Production Efficiency ◽  
Stress Conditions ◽  
Broiler Chicks ◽  
Growth Promoter ◽  
Growth Promoters ◽  
Breast Meat ◽  
Heat Stress Condition

Nowadays, phytogenic products have received great attention as a growth promoter due to their safety and environmentally friendly effect as a replacement for classical growth promoters such as antibiotics in animal nutrition. Thus, this research seeks the possibility of using fennel seed powder (FSP) as a dietary additive from 19 to 41 days of age on productive performance, carcass traits, meat quality, and production efficiency of broiler chickens raised under thermoneutral and chronic heat stress conditions. Thus, 216 one-day-old Ross-308 broiler chicks were divided into two equal groups. The first group was placed in an independent temperature-controlled room at 23 ± 2 °C. The broiler chicks from the second group were placed in a heat-stressed room and exposed to chronic heat stress conditions (32 ± 2 °C) for seven hours per day from 8 a.m. to 3 p.m. The experimental design was 2 × 3 factorial including two environmental temperatures (thermoneutral vs chronic heat stress) and three experimental diets that contained 0, 1.6, and 3.2% FSP. The chickens were randomly assigned to 18-floor pens per room temperature, representing six replicates per treatment and six birds per replicate. The results showed that dietary fennel seed powder during days 19–41 of age enhanced the growth rate of broiler chickens and improved breast meat redness and reduced temperature under chronic heat stress. In conclusion, 3.2% of fennel seed powder could be used as an agent for enhancing the broiler’s tolerance during chronic heat stress condition from 19 to 41 days of age. Moreover, it is necessary to study in further detail the nitrite and nitrate contents in FSP and their impacts on muscle redness (a*) as well as muscle temperature.

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