膨化秸秆微生物发酵饲料对杜寒杂交肉羊生长性能和胃肠道发育的影响

doi:10.12160/j.issn.1672-5190.2022.02.005

Abstract

Abstract: [Objective] To investigate the effects of microbial fermented expanded straw feed on growth performance and gastrointestinal tract development of Dorper and Thin-tailed Han crossbred sheep. [Method] A total of 81 3-month-old Dorper and Thin-tailed Han crossbred sheep weighing （23.0±1.0） kg were chosen and randomly assigned into the following three groups: control group （70% concentrate + 30% dry straw）, experimental group Ⅰ（70% concentrate + 30% microbial fermented expanded straw feed）, and experimental group Ⅱ （70% concentrate + 30% microbial fermented expanded straw feed, supplemented with expanded slow-release urea accounting for 10% of the total dietary protein concentration, NPN≥100%）. The experiment lasted for 75 days, with a 15-day pre-feeding period and a 60-day formal feeding period. The weight gain of the fattening sheep during the experiment was evaluated, and the gastrointestinal tract tissues were weighted and morphologically characterized. [Result] The feed intake and daily weight gain in experimental groups Ⅰ and Ⅱ were extremely significantly （P<0.01） boosted by the microbial fermented expanded straw feed. The weight of the large intestine, the total weight of the digestive tract, and the rumen volume were significantly （P<0.05） increased in experimental groups Ⅰ and Ⅱ compared with those of control group. The color of the rumen internal wall was better in experimental group Ⅱ than that in the other groups. [Conclusion] The microbial fermented expanded straw feed promotes the growth performance and gastrointestinal tract development of fattening sheep, with experimental group Ⅱ having a stronger effect.

Key words: microbial fermented expanded straw feed, Dorper and Thin-tailed Han crossbred sheep, growth performance, gastrointestinal tract development

CLC Number:

WANG Xiao-fei, GAO Yuan, TIAN Feng, LI Jiu-yue, XUE Shu-yuan, CHEN Mu-lan, BAI Xiao-lu. Effects of Microbial Fermented Expanded Straw Feed on Growth Performance and Gastrointestinal Tract Development of Dorper and Thin-tailed Han Crossbred Sheep[J]. Animal Husbandry and Feed Science, 2022, 43(2): 28-34.

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Effects of Microbial Fermented Expanded Straw Feed on Growth Performance and Gastrointestinal Tract Development of Dorper and Thin-tailed Han Crossbred Sheep

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