This study investigated effects of dietary ifbre and grit on growth performance, gastrointestinal tract （GIT） development, serum indexes and grit retention of Sichuan white goslings in China. The experiment was a 3&...This study investigated effects of dietary ifbre and grit on growth performance, gastrointestinal tract （GIT） development, serum indexes and grit retention of Sichuan white goslings in China. The experiment was a 3×2 factorial design consisting of dietary crude ifbre （CF） at 2.0, 4.0 and 6.0%levels by adding grass meal and with or without grit supplementation. A total of 720 1-d-old male goslings were randomly allocated into 36 pens of 20 goslings/pen （n=6 pens/treatment）. At 21 d of age, GIT, blood samples and grit in gizzards were collected. Body weight （BW）, empty BW （without GIT）, average daily gain （ADG） and average daily feed intake （ADFI） were affected by CF levels and the medium （4.0%） had the highest value. Adding grit improved BW, empty BW, ADG and ADFI. CF affected relative weight or length of proventriculus, gizzard and duodenum. Increasing CF levels decreased jejunum villus height and affected caecal crypt depth and villus height to crypt depth ratio. Higher CF levels decreased serum triglyceride. Adding grit increased relative weight of abdominal fat. Grit addition increased grit weight in gizzard and the ratio of grit in 0.45-1 and 1-2 mm while decreasing the ratio of grit〈0.45 and 2-3 mm. In conclusion, moderate CF level and grit addition increased performance of goslings without interaction. Dietary CF levels affected the development of upper GIT and serum triglyceride. Grit needed by goslings should be less than 2 mm. Goslings’ gizzard would accumulate grit from feed when other grit could not be acquired.展开更多
目的实验旨在观察磁场干预对大鼠外周神经损伤后神经瘢痕形成过程的影响。方法选用清洁SD大鼠80只,均对其行左侧坐骨神经卡压术,造成神经损伤,术后随机分4组,对照组1组,实验组3组,实验组分别给予0.2 m T、0.6 m T、1.5 m T强度磁疗,60 m...目的实验旨在观察磁场干预对大鼠外周神经损伤后神经瘢痕形成过程的影响。方法选用清洁SD大鼠80只,均对其行左侧坐骨神经卡压术,造成神经损伤,术后随机分4组,对照组1组,实验组3组,实验组分别给予0.2 m T、0.6 m T、1.5 m T强度磁疗,60 min/d,21 d后测量坐骨神经功能指数(SFI),之后取材,进行Ⅰ型胶原纤维免疫组织化学染色、透射电镜观察,并对实验资料进行统计学处理。结果实验组较对照组神经功能指数更接近正常;神经损伤处Ⅰ型胶原纤维增生少,髓鞘板层厚且走行规则。结论磁场干预可以明显抑制神经瘢痕的形成,促进神经再生及其功能恢复。展开更多
基金financially supported by the China Agriculture Research System (CARS-43-14)the Special Fund for Agro-scientific Research in the Public Interest, China (201303143)
文摘This study investigated effects of dietary ifbre and grit on growth performance, gastrointestinal tract （GIT） development, serum indexes and grit retention of Sichuan white goslings in China. The experiment was a 3×2 factorial design consisting of dietary crude ifbre （CF） at 2.0, 4.0 and 6.0%levels by adding grass meal and with or without grit supplementation. A total of 720 1-d-old male goslings were randomly allocated into 36 pens of 20 goslings/pen （n=6 pens/treatment）. At 21 d of age, GIT, blood samples and grit in gizzards were collected. Body weight （BW）, empty BW （without GIT）, average daily gain （ADG） and average daily feed intake （ADFI） were affected by CF levels and the medium （4.0%） had the highest value. Adding grit improved BW, empty BW, ADG and ADFI. CF affected relative weight or length of proventriculus, gizzard and duodenum. Increasing CF levels decreased jejunum villus height and affected caecal crypt depth and villus height to crypt depth ratio. Higher CF levels decreased serum triglyceride. Adding grit increased relative weight of abdominal fat. Grit addition increased grit weight in gizzard and the ratio of grit in 0.45-1 and 1-2 mm while decreasing the ratio of grit〈0.45 and 2-3 mm. In conclusion, moderate CF level and grit addition increased performance of goslings without interaction. Dietary CF levels affected the development of upper GIT and serum triglyceride. Grit needed by goslings should be less than 2 mm. Goslings’ gizzard would accumulate grit from feed when other grit could not be acquired.
文摘目的实验旨在观察磁场干预对大鼠外周神经损伤后神经瘢痕形成过程的影响。方法选用清洁SD大鼠80只,均对其行左侧坐骨神经卡压术,造成神经损伤,术后随机分4组,对照组1组,实验组3组,实验组分别给予0.2 m T、0.6 m T、1.5 m T强度磁疗,60 min/d,21 d后测量坐骨神经功能指数(SFI),之后取材,进行Ⅰ型胶原纤维免疫组织化学染色、透射电镜观察,并对实验资料进行统计学处理。结果实验组较对照组神经功能指数更接近正常;神经损伤处Ⅰ型胶原纤维增生少,髓鞘板层厚且走行规则。结论磁场干预可以明显抑制神经瘢痕的形成,促进神经再生及其功能恢复。
