Influence of Fasting and Feed Constituents Size Variation on Broiler Performance and Intestinal Demonstrations

[摘要] Investigation was performed to elucidate the effects of fasting and feed constituents’ size variation on broilers performance and GIT demonstrations. Experiment was performed on 90 newly hatched chicks by dividing them into 3 treatment groups including T1, T2 and T3. Chicks in group T1 were fasted for 48 hours, T2 were fed a coarsely ground diet and T3 were finely ground mash diet. Results showed significant difference for residual egg yolk weight (2.54 ± 0.29a ) and final body weight (50.1 ± 0.3b ) in group T1; however, concerning weight of proventriculus + gizzard significant difference occurred in the group T2 (8.20 ± 0.08a ). Chicks in group T1 possessed significantly higher weight of pancreas (0.32 ± 0.00b ), jejunum (2.28 ± 0.05b ) and ileum (1.98 ± 0.14b ), while length of duodenum appeared higher in group T2 (25.92 ± 0.51a ) followed by T3 (20.32 ± 0.77b ) and T1 (18.24 ± 0.29c ). Length of jejunum (41.44 ± 0.82a ) and ileum (40.22 ± 0.93a ) was significantly different in group T2. Duodenum villi height, cell area and muscularis externa thickness were significantly different in the group T1; however, body weight gain, diet intake and feed conversion efficiency showed significant difference in the group T2. Study concludes that post hatch fasting negatively affects the growth performance, gross and histological structures of digestive organs in broilers.

[学科分类] 生物科学（综合）

[关键词] Broilers;Intestinal morphology;Villi;Post hatching