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对在西宁地区饲养的爱拔益加(AA)父母代种的生产性能进行了观测,结果表明,平均开产日龄25.5周(即174-177日龄),开产体重在2825g-2895g之间,42周龄时平均产蛋率第I栋鸡舍为56.86%,第Ⅱ栋鸡舍为46.52%;产蛋高峰时产蛋率第I栋和第Ⅱ栋分别为89.89%和69.73%,42周时只鸡累计产蛋量第I栋为71枚,第Ⅱ栋为58枚,平均蛋重61.72g,种蛋受精率第I栋为93.57 相似文献
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在湟源五九二六四部队养殖场观测黄金褐蛋鸡的生产性能。结果:育雏成活率98.6%,育成成活率96.9%,入舍母鸡存活率93.5%。155日龄开产,饲养日产蛋率77.28%,高峰产蛋率达92%,68周龄入舍母鸡累计产蛋241枚,平均蛋重63.25g料蛋比2.90:1。该品种比较适宜青海东部地区的气候条件,具有一定推广价值。 相似文献
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在湟源五九二六四部队养殖场观测整理了两批新罗曼商品蛋鸡的生产性能。结果表明,育雏成活率99.94%,育成成活率975,入舍母鸡存活率93%,164日龄开产,高峰产蛋率在90%,68周龄入舍母鸡累计产蛋240枚,平均蛋重63.4d,料蛋比2.70:1,该品种比较适宜青海东部地区的气候条件,具有一定推广价值。 相似文献
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黄羽鹌鹑生产性能观察 总被引:8,自引:1,他引:7
对第二世代黄羽鹌鹑生长、生产性能进行观测的结果,公母1∶3的配种比例情况下,种蛋受精率88.6%,受精蛋孵化率84.5%,健雏率96.5%,育雏成活率97%。平均蛋重11.43g,试验期平均产蛋率84.7%。300日龄每鹑产蛋212个,料蛋比2.68∶1。两周龄体重平均47.75g,成年体重略轻,公鹑114.06g,母鹑平均为143.63g。 相似文献
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为了解海兰褐蛋鸡在福州地区的生产性能及是否适应该地区的气候环境设计本试验。经过72周的观察,该蛋鸡表现出良好的生产性能,育雏成活率98.59%,育成成活率96.31%,115日龄见蛋,152日龄产蛋率达50%,最高产蛋率达94.6%,蛋料比1:2.52,产蛋期蛋鸡存活率93.72%。说明海兰褐蛋鸡能适应本地区自然环境。 相似文献
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鸡群产蛋达到80%就进入产蛋高峰期,一般在21-47周龄。本期管理的原则在于尽可能地让鸡维持较长的产蛋高峰,23周龄产蛋率达90%,高峰产蛋率值达95%~96%,90%以上产蛋率维持6个月;产蛋高峰下降慢,48周龄以后产蛋率从90%逐步缓慢下降,72周龄下降到78%,每周平均下降0.48个百分点。 相似文献
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甜菜碱对肉用型种鸡生产性能的影响 总被引:1,自引:0,他引:1
将90只37周龄AA父母代种母鸡随机分为3组,每组30只,1组为对照组,饲喂玉米—豆粕型基础日粮,2组和3组为试验组,分别饲喂含甜菜碱100毫克/千克和200毫克/千克的基础日粮7周,限制饲养。测定每组鸡的产蛋率、平均蛋重、料蛋比和种蛋孵化率。结果表明:2组的产蛋率分别比1组和3组提高8.17和6.6个百分点(P<0.01),2组和3组的耗料分别比对照组降低2.4%和6.1%,3组的入孵蛋孵化率比1组提高5.9个百分点(P<0.05),平均蛋重三组间差异不显著 相似文献
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中国圈养野生动物疫苗使用调查 总被引:1,自引:0,他引:1
2005年对中国动物园协会单位中的18家动物园饲养野生动物疫苗免疫情况进行调查。受调查动物园在野生动物疫苗使用和动物种类方面具有一定的代表性。调查结果显示动物园动物现共使用18类36种疫苗,预防31种疫病。其中哺乳动物使用14类24种疫苗,预防24种疫病;禽类使用4类12种疫苗,预防7种疫病。使用范围最广的有禽流感、犬瘟热疫苗等、新城疫疫苗、猫瘟热疫苗等。共有24目58科动物接种疫苗,其中食肉动物类1目8科,食草动物类3目9科,杂食动物类2目3科,禽类18目38科。研究结果提示应加强动物园之间疫病信息交流、防疫资源的利用、疫病监测和研究,加大对动物园动物疫病的研究投入,逐步建立动物园动物统一的防疫规程。 相似文献
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Krizsan SJ Nyholm L Nousiainen J Südekum KH Huhtanen P 《Journal of animal science》2012,90(9):3162-3173
The objective of this study was to compare the application of different in vitro and in situ methods in empirical and mechanistic predictions of in vivo OM digestibility (OMD) and their associations to near-infrared reflectance spectroscopy spectra for a variety of forages. Apparent in vivo OMD of silages made from alfalfa (n = 2), corn (n = 9), corn stover (n = 2), grass (n = 11), whole crops of wheat and barley (n = 8) and red clover (n = 7), and fresh alfalfa (n = 1), grass hays (n = 5), and wheat straws (n = 5) had previously been determined in sheep. Concentrations of indigestible NDF (iNDF) in all forage samples were determined by a 288-h ruminal in situ incubation. Gas production of isolated forage NDF was measured by in vitro incubations for 72 h. In vitro pepsin-cellulase OM solubility (OMS) of the forages was determined by a 2-step gravimetric digestion method. Samples were also subjected to a 2-step determination of in vitro OMD based on buffered rumen fluid and pepsin. Further, rumen fluid digestible OM was determined from a single 96-h incubation at 38°C. Digestibility of OM from the in situ and the in vitro incubations was calculated according to published empirical equations, which were either forage specific or general (1 equation for all forages) within method. Indigestible NDF was also used in a mechanistic model to predict OMD. Predictions of OMD were evaluated by residual analysis using the GLM procedure in SAS. In vitro OMS in a general prediction equation of OMD did not display a significant forage-type effect on the residuals (observed - predicted OMD; P = 0.10). Predictions of OMD within forage types were consistent between iNDF and the 2-step in vitro method based on rumen fluid. Root mean square error of OMD was least (0.032) when the prediction was based on a general forage equation of OMS. However, regenerating a simple regression for iNDF by omitting alfalfa and wheat straw reduced the root mean square error of OMD to 0.025. Indigestible NDF in a general forage equation predicted OMD without any bias (P ≥ 0.16), and root mean square error of prediction was smallest among all methods when alfalfa and wheat straw samples were excluded. Our study suggests that compared with the in vitro laboratory methods, iNDF used in forage-specific equations will improve overall predictions of forage in vivo OMD. The in vitro and in situ methods performed equally well in calibrations of iNDF or OMD by near-infrared reflectance spectroscopy. 相似文献
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昆明小鼠卵母细胞体外成熟培养条件优化 总被引:1,自引:1,他引:0
对不同的培养液(M199、mDPBS、TYH)和培养液添加物对小鼠C级卵母细胞体外发育和成熟的影响进行了研究。结果表明,mDPBS培养液的培养效果(GVBD:19.8%,PBI:12.3%)好于(P〈0.05)M199培养液(GVBD:13.3%,PBI:8.9%)和TYH培养液(GVBD:12.3%,PBI:7.4%);mDPBS中添加丙酮酸钠和FCS(GVBD:100%,PBI:86.3%)明显优于(P〈0.01)单纯添加丙酮酸钠(GVBD:42.9%,PBI:23.8%),也明显优于(P〈0.01)添加丙酮酸钠+BSA(GVBD:63.2%,PBI:53.8%);就A、B和C级3种卵母细胞相比,C级卵母细胞的成熟发育最佳,GVBD的发生率为100.0%,PBI的排出率为86.2%。 相似文献
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中国野生动物驯养与繁殖法律制度的缺陷与完善 总被引:1,自引:0,他引:1
野生动物驯养繁殖在世界野生动物资源保护中具有重要作用,有关野生动物驯养繁殖的法律制度也成为各国野生动物资源保护立法的主要内容。本文针对目前中国野生动物驯养繁殖的立法现状与存在问题,提出完善中国野生动物驯养繁殖的国内法对策,以推进中国野生动物资源保护立法的发展。 相似文献
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Tatyana I. KOCHAN 《Integrative zoology》2006,1(2):67-69
The study was conducted on six reindeers in December. It was established that concentration of reducing sugars in the chyme of jejunum increases substantially (6 times in comparison with abomasum), whereas concentration cellulose, on the contrary, decreases (4.5 times). The maximal increase of monosaccharides in the small intestine testifies to formation of metabolic fund of sugars in this part of the alimentary tract due to high degree of polysaccharides hydrolysis of exogenous, as well as endogenous, microbial formation. Obtained data assume that the need of the reindeer for glucose is provided for not only by gluconeogenesis as it was considered before, but also by absorption of monosaccharides from the alimentary tract. 相似文献
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大庆市羊东毕吸虫病流行病学调查 总被引:1,自引:0,他引:1
对大庆市羊东毕吸虫病的流行病学进行了调查研究。结果表明,大庆有3种东毕吸虫,即程氏东毕吸虫(O.cheni)、土耳其斯坦东毕吸虫(O.turkestanica)和土耳斯坦东毕吸虫结节变种(O.turkestanican var.thuberculata);中间宿主螺类有1种,即卵萝卜螺;东毕吸虫病在大庆分布很广,所调查的4区2县均有发生,羊东毕吸虫平均感染率分别为50.33%,平均死亡率为21.12%,大庆羊急性病例发病时间为8月上旬至10月下旬,慢性病例为11月上旬至翌年2月中旬。 相似文献