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两种不同养殖模式对肉鹅生长性能和粪便微生物区系的影响 被引量:2
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作者 潘建秋 李秀金 +5 位作者 江丹莉 沈栩 许丹宁 田允波 贺建华 黄运茂 《中国家禽》 北大核心 2022年第1期60-66,共7页
为了解笼养和平养模式对肉鹅生长性能和粪便微生物区系的影响,试验将70只0日龄马岗鹅随机分为笼养组和平养组,每组35只,记录肉鹅的死淘率、体重和采食量,到9周龄试验结束时,检测血液生长激素水平,并用16S rRNA测序技术分析和粪便微生物... 为了解笼养和平养模式对肉鹅生长性能和粪便微生物区系的影响,试验将70只0日龄马岗鹅随机分为笼养组和平养组,每组35只,记录肉鹅的死淘率、体重和采食量,到9周龄试验结束时,检测血液生长激素水平,并用16S rRNA测序技术分析和粪便微生物区系变化。结果显示:在整个试验期,笼养组的死淘率和料重比均高于平养组,且料重比呈极显著性升高(P<0.01),平均日增重则极显著低于平养组(P<0.01);肉鹅9周龄时,笼养组的血清GH、IGF-1和T3水平均低于平养组,ADR水平则高于平养组,但均无显著性差异(P>0.05)。与平养组相比,笼养组粪便微生物区系中优势菌群发生变化,特别是粪便中厚壁菌门和变形菌门比例降低,拟杆菌门比例升高;KEGG富集通路分析表明,平养组粪便菌群主要涉及内分泌、新陈代谢和信号转导,而笼养组粪便菌群富集通路大多数属于新陈代谢类。结果表明笼养模式通过降低肉鹅采食量和体重增长抑制肉鹅生长性能,改变粪便微生物区系组成,使粪便优势微生物富集于新陈代谢途径。 展开更多
关键词 笼养模式 平养模式 肉鹅 生长性能 粪便微生物菌群
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The launch of the multivariate English education in institutions of higher learning in our country and the curriculum design
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作者 Tang Mingxia 《International English Education Research》 2014年第12期50-52,共3页
At present, with the further deepening of the integration of the world economy, the international exchanges and cooperation continue to increase, and the training mode of the talents must also be internationalized. Th... At present, with the further deepening of the integration of the world economy, the international exchanges and cooperation continue to increase, and the training mode of the talents must also be internationalized. The students should receive the cultivation of the professional knowledge, and at the same time, they must have a certain ability of the cross-cultural communication and the level of the professional English. In addition, the national medium and long-term educational reform and development plan (2010 - 2020) also proposed the strategic requirements to improve the quality of the higher education and the level of the internationalization, to promote the comprehensive development of the students. Because of this, the national big colleges and universities are carrying out the reform of the university English teaching in different degrees, and have achieved certain results. But today, in terms of the direction of the educational reform of the university English, the academic circles are still unable to reach an agreement. For example, to set the university courses in English, some scholars believe that because the English levels of the high school graduates enhance unceasingly, the courses with the language teaching as the main contents cannot meet the needs of the students, which need to be reduced or even eliminated, and should be replaced by the bilingual teaching with the liberal education as the contents. Also some scholars advocated that the orientation of the university English teaching in the future should be the ESP teaching or the academic English teaching, rather than the traditional English teaching for the humanities. 展开更多
关键词 multivariate English education colleges and universities DEVELOPMENT curriculum design
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