Effects of Dietary Fiber Lever and Grit on Intestinal Morphology, Cellulolytic Enzyme Activities and Volatile Fatty Acid Contents in Sichuan White Geese

JIN Ling; LUO Hailing; GAO Yuyun; YANG Lin

doi:10.3969/j.issn.1006-267x.2020.07.050

2020 , Vol. 32 >Issue 7: 3403 - 3411

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.07.050

Effects of Dietary Fiber Lever and Grit on Intestinal Morphology, Cellulolytic Enzyme Activities and Volatile Fatty Acid Contents in Sichuan White Geese

JIN Ling ,
LUO Hailing ,
GAO Yuyun ,
YANG Lin

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1. China National Engineering Research Center of JUNCAO Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
2. College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
3. College of Animal Science, South China Agricultural University, Guangzhou 510642, China

Received date: 2019-11-19

Online published: 2020-07-15

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Abstract

This study was investigated the effects of dietary crude fiber (CF) level and grit on intestinal morphology, cellulolytic enzyme activities and volatile fatty acid contents in geese. This experiment was adopted a two factorial design, which consisting with or without grit addition and three levels of dietary CF (4.0%, 7.0% and 10.0%). A total of 648 Sichuan white male geese at 22 days of age were divided into 6 treatments, each with 6 replicates, each replicate with eighteen geese. At 70 days of age, geese were slaughtered to collect samples. The results showed as follow:1) the jejunum villus height in 7.0% group and 10.0% group was significantly higher than that in 4.0% group (P<0.05), and cecal villus height and cecal villus height to crypt depth ratio in 10.0% group were significantly higher than those in 4.0% group and 7.0% group (P<0.05). The addition of grit significantly reduced the depth of the cecal crypt (P<0.05). 2) The cellulase and xylanase activities in duodenum in 10.0% group was significantly higher than that in 4.0% group (P<0.05); the cellulase activity in cecum in 4.0% group was significantly higher than that in 7.0% group (P<0.05), and xylanase activity was significantly higher than that in 7.0% group and 10.0% group (P<0.05). 3) The acetic acid content in the jejunum and ileum in 10.0% group were significantly higher than those in 7.0% group (P<0.05). In conclusion, increasing dietary CF levels increase the development of the small intestine and cecal villi in growing geese; and mainly promote the microbial fermentation of small intestines in geese. It is recommended that CF level for 22 to 70 aged Sichuan white geese diet can be up to 10%; and there is no need to add grit to growing or finishing geese raised on concrete floor.

Key words： crude fiber; grit; geese; intestinal morphology; cellulolytic enzyme; volatile fatty acids

Cite this article

JIN Ling , LUO Hailing , GAO Yuyun , YANG Lin . Effects of Dietary Fiber Lever and Grit on Intestinal Morphology, Cellulolytic Enzyme Activities and Volatile Fatty Acid Contents in Sichuan White Geese[J]. Chinese Journal of Animal Nutrition, 2020 , 32(7) : 3403 -3411 . DOI: 10.3969/j.issn.1006-267x.2020.07.050

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