Abstract
ABSTRACT The present study was conducted to investigate the effects of dietary fiber on growth performance, fat deposition, serum lipids, fat metabolism, and mRNA (messenger RNA) expression of lipoprotein lipase (LPL) in Jilin white and Carlos geese. Sixty Jilin white and sixty Carlos geese aged six-weeks and of similar health and weight (average weight 313.11g) were selected. Geese of each breed were randomly divided into two groups (n=30), and with each group containing three replicate subgroups of 10 geese. The diet was supplemented with 8% or 11% fiber (corn straw powder). The Jilin white geese are divided into A1 (8%) and A2 (11%) groups, and Carlos geese are divided into B1 (8%) and B2 (11%) groups. The experiment lasted 35 days. The results showed that high dietary fiber can significantly (p<0.05) increase average daily feed intake (ADFI), significantly (p<0.05) reduce final weight (FW) and average daily gain (ADG) of both varieties, and increase LPL mRNA expression levels in abdominal fat, liver, sebum, and urethral glands. High dietary fiber accelerates intestinal peristalsis, affects the absorption of other nutrients, reduces the available energy value of the absorbed feed, and increases fat loss. Compared with the to Carlos geese, high dietary fiber content had a more significant effect on the live, slaughter, and sebum weights and sebum percentage of the Jilin white geese, indicating that the Carlos geese have higher requirements for dietary fiber content. High fiber content will reduce the growth performance, slaughter performance, and fat deposition of geese.
Highlights
Compared to other poultry, geese have minimal fiber requirements and can utilize the crude fiber of plant feed due to their specific digestive systems (Durant et al, 2003)
average daily gain (ADG) decreased with an increase in dietary fiber
Our results revealed that 11% crude fiber (CF) improved average daily feed intake (ADFI) more than 8% CF but decreased ADG during the 35th day feeding experiment, a result consistent with previous reports
Summary
Geese have minimal fiber requirements and can utilize the crude fiber of plant feed due to their specific digestive systems (Durant et al, 2003). Jiang et al (2012) reported that dietary alfalfa meals decreased abdominal fat percentages and concentrations of triglyceride (TG), total cholesterol (TC), and low-density lipoprotein cholesterol (LDLC). He et al (2015) reported that dietary fiber increased lipase and cellulase activity in the intestinal tract of geese. These results vary based on the growing environment and breed of geese and some conclusions deduced from the particular trial results may reflect bias, emphasizing the need for further research on the effects of dietary fiber on different breeds of geese. Jilin white and Carlos geese were used to study the effects of different dietary fiber levels on eRBCA-2020-1287
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