共查询到20条相似文献，搜索用时 515 毫秒
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按照不同的年龄阶段、不同性别的绒山羊,进行产绒量、体重的现场测定,采取相同羊号的毛样,利用奥达2.0光学纤维直径分析仪,对羊毛细度进行测定,分析南疆绒山羊主要经济表型性状的相关性。结果表明:成年母羊取样56只,绒产量与细度呈现正相关差异极显著(P<0.01);体重与细度呈现正相关,差异不显著;体重与绒产量呈现负相关差异不显著。育成母羊取样81只,产绒量与细度呈现正相关,差异显著(P<0.05);体重与细度呈现正相关,绒产量与体重呈现正相关,差异都不显著。2~3周岁公羊取样22只,绒产量与细度呈现正相关,差异显著(P<0.05),体重与细度呈现正相关,绒产量与体重呈现正相关,差异都不显著。4~6周岁公羊取样21只,绒产量与细度呈现弱的正相关,体重与细度呈现负相关,绒产量与体重呈现正相关,差异都不显著。 相似文献
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为了解近年来内蒙古阿拉善地区阿拉善白绒山羊绒纤维细度的变化情况,该试验采用国标方法,利用全自动纤维细度仪,分别于2010年和2014年测定了洪格尔鄂楞地区阿拉善白绒山羊绒纤维的细度,比较、分析了不同年度绒山羊的绒纤维细度之间的差异及绒纤维细度的分布情况。试验结果表明,2010年阿拉善白绒山羊绒平均细度分别为公羊(16.60±1.63)μm、母羊(16.93±1.58)μm,2014年平均细度分别为公羊(13.83±0.79)μm、母羊(14.52±0.74)μm,2014年测定的公、母绒山羊绒平均细度均极显著小于2010年测定的公、母绒山羊绒平均细度(P0.01)。结果提示,近年来采取的相关措施显著地减小了阿拉善地区阿拉善白绒山羊绒纤维细度。 相似文献
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《当代畜牧》2016,(36)
笔者检验了国药集团扬州威克生物工程有限公司制备的高致病性猪繁殖与呼吸综合征活疫苗(JXA1-R株)免疫效力,对SY-007批苗、国内市售某同类疫苗和进口苗进行比较,包括外观、溶解性、病毒含量和安全性和攻毒保护率。结果显示,国药集团扬州威克生物工程有限公司疫苗与市售某国产苗和进口苗在外观上稍有颜色差异,但溶解性无明显差异;国药集团扬州威克生物工程有限公司疫苗与市售某国产苗病毒含量相同,均高于进口苗;3种疫苗对裸鼠和仔猪均具有较好的安全性;国药集团扬州威克生物工程有限公司疫苗的免疫效力与进口苗效果基本一致,且明显好于市售某国产苗。系列试验结果表明,国药集团扬州威克生物工程有限公司生产的高致病性猪繁殖与呼吸综合征活疫苗(JXA1-R株)产品质量与进口苗相当,优于市售某国产苗。 相似文献
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供作纺织用的动物纤维主要有绵羊毛、山羊毛、山羊绒,兔毛、牦牛绒,骆驼绒和蚕丝等。绵羊毛是毛纺工业的主体原料,产量占世界纺织用天然动物毛总产量的97%左右。除绵羊毛以外,毛纺业将其它可供纺织的动物毛纤维统称为特种动物纺织纤维。这些动物纤维尽管只占世界动物毛产量的3%左右,但是在我国资源十分丰富,产量占全国天然动物毛总产量的20%,是我国出口创汇的 相似文献
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通过山羊绒细度分析挖掘中国细型绒山羊遗传资源 总被引：1，自引：0，他引：1
为揭示细绒山羊品种的资源分布,测定了我国主要绒山羊品种的羊绒细度。利用从澳大利亚进口的便携式(OFDA-2000)纤维检测仪分别检测新疆山羊(雪羚羊场新疆山羊、和丰县新疆山羊和阿合奇县新疆山羊)、内蒙古绒山羊(阿拉善型和二狼山型)、宁夏中卫山羊的羊绒纤维直径。结果表明:阿拉善型内蒙古绒山羊、宁夏中卫山羊和雪羚羊场新疆山羊的羊绒细度比较理想,其平均细度分别为14.2、14.6和14.9μm,且差异均不显著(P0.05);二狼山型内蒙古绒山羊、阿合奇县新疆山羊以及和丰县新疆山羊的平均羊绒细度分别为15.2、16.2和16.7μm,且这3种山羊的羊绒细度与阿拉善型内蒙古绒山羊、宁夏中卫山羊和雪羚羊场新疆山羊的细度间差异均达显著水平(P0.05)。上述结果为我国细型绒山羊的培育提供了良好的种质资源信息,对后期山羊绒生产加工有着重要意义。 相似文献
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以取自山东省内草捆、草粉、草颗粒和青贮饲料4大类饲草产品为材料,通过滤袋法测定样品流失重量比率、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量,研究了不同粉碎细度(9目、18目和40目)和不同孔径的聚酯布、尼龙布、无纺布滤袋处理对饲草中NDF和ADF含量的影响。结果显示,粉碎细度处理对F58滤袋内样品重量流失率影响差异不显著,变化范围为1.37%~1.86%;对NDF含量影响显著,40目处理显著低于9目处理(P<0.05),与18目处理差异不显著。ADF含量在各粉碎细度处理间变化不明显,10个样品中有6个样品各处理间差异不显著。不同滤袋试验结果表明,CAU滤袋测定样品NDF和ADF含量与F58滤袋差异不显著,而其它滤袋处理的测定值均与F58滤袋差异显著(P<0.05),聚酯布和尼龙布滤袋在ADF测定中出现封口内缘断裂现象。 相似文献
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《Livestock Production Science》2002,73(2-3):185-198
The objectives of this study were to estimate the genetic variation in pasture intake and digestibility of the selected diet by young and by adult sheep, and to determine the genetic relationships between pasture intake and productivity traits. The pasture intakes of groups of young and adult sheep, each containing sheep from 11 bloodlines, were measured using the paired alkane technique. The wool grown, and its fibre diameter, over the intake measurement period were also estimated, as were liveweight and fat depth. Differences in pasture intake between bloodlines were largely related to liveweight in both groups of sheep, and were repeatable (t=0.8) between the groups. The repeatability of wool growth and wool growth efficiency was a little higher (t>0.9). Combining all the known estimates improved the precision of the genetic parameter estimates. The pooled estimates of heritability of DOMI, wool growth, wool growth efficiency and fibre diameter were 0.12±0.04, 0.37±0.05, 0.25±0.05 and 0.66±0.08, respectively. The genetic relationships of wool growth efficiency with wool growth and fibre diameter were 0.84±0.20 and −0.03±0.12, respectively, while those for feed intake (as DOMI) with wool growth and fibre diameter were −0.02±0.17 and 0.40±0.15. 相似文献
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Rafat SA de Rochambeau H Brims M Thébault RG Deretz S Bonnet M Allain D 《Journal of animal science》2007,85(11):3116-3122
An experiment was conducted to describe the characteristics of Angora rabbit fiber using optical fiber diameter analyzer (OFDA). A total of 349 fleece samples were collected from 60 French Angora rabbits. Recorded measurements of OFDA were as follows: mean fiber diameter, CV of fiber diameter, comfort factor, spinning fineness, mean fiber curvature, SD of fiber curvature, mean opacity of fibers, percentage of medullated fibers, mean fiber diameter along the length, and SD of fiber diameter along the length. Comfort factor is the percentage of fibers less than or equal to 30 microns. The main effects included in the mixed model were fixed effects of group, harvest season, and age and a random effect of animal. Correlations among total fleece weight, compression, and OFDA measurements were calculated. Mean fiber diameter was lower than the fiber diameter along the length. Mean percentage of medullated fibers was very low and ranged from 0.1 to 7.3%. The mean comfort factor was 97.5% and ranged from 93.3 to 99.8%. The mean fiber curvature was 40.1 degrees/mm. The major changes in Angora fleece characteristics from 8 to 105 wk of age were an increase in fiber diameter, CV of fiber diameter, mean fiber diameter along the length and curvature, and a decrease in compression and comfort factor. The effect of harvest season was significant on some fiber characteristics. Mean fiber diameter and the mean fiber diameter along the length had a positive correlation with total fleece weight. The OFDA methodology is a method to evaluate fiber diameter, CV of fiber diameter, and bristle content through measuring of the comfort factor. However, OFDA is not adapted for measuring opacity or size of the medulla, or both, in Angora wool and needs a new definition or a special calibration. The spinning fineness should be redefined and adapted for Angora rabbits. 相似文献
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微卫星座位与超细型细毛羊羊毛性状的关联性分析 总被引：3，自引：1，他引：2
本研究选取了绵羊基因组1号和3号染色体上的8个微卫星座位,对超细型细毛羊的232个个体的遗传多样性进行了检测。计算了各微卫星座位的等位基因频率（p）、杂合度（H）、多态信息含量（PIC）和有效等位基因数（N）。同时检测了研究样本的羊毛纤维直径（WFD）,毛纤维直径离散度（FD-D）,单纤维绝对强力（WAS）,单纤维相对强力（WRS）,强力离散（WSD）,单纤维自然长度（WNL）,单纤维伸直长度（WEL）和单纤维弯曲度（FW）等羊毛性状的8个表型数据。微卫星座位与羊毛性状表型数据的关联性分析结果表明,微卫星 BL-4和KRT2-13两个座位与WEL之间极显著相关（P<0.01）。微卫星Oarcp43座位与WSD之间、微卫星座位Bms1248与羊毛单纤维直径之间极显著相关（P<0.01）。座位Fcb5和OarDB6分别与FW和WAS表现出显著性关系（P<0.05）。 相似文献
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为研究萨福克羊×杜泊羊×湖羊杂交羊(萨杜湖杂交羊)生长发育情况及其对当地生态环境的适应能力,采用生产性能常规测定、显微测定和全自动血液生理生化分析仪分别测定了不同年龄阶段萨杜湖杂交羊的体重、体尺指标、羊毛品质(包括不同部位羊毛的净毛率、细度、有髓毛和无髓毛占比、自然长度和伸直长度等指标)和成年羊血液生理生化指标。结果表明:萨杜湖杂交羊早期生长速度较快,初生阶段及周岁时公羊体斜长均显著高于母羊(P<0.05);3月龄时公羊体高、体斜长和胸围均显著高于母羊(P<0.05);6月龄时母羊体重极显著高于公羊(P<0.01),成年时期公羊体重和体高均显著高于母羊(P<0.05);其余各生长阶段内,公母羊间体重及体尺差异不显著(P>0.05)。其成年时平均净毛率较低,为45.21%;长度适中:平均自然长度为4.55cm,伸直长度为6.22cm;细度良好,为17.60μm。公母羊血液生理生化指标及其同国内绵羊参考值相比存在一定的差异,其中母羊血小板总数(PLT)和血小板压积(PCT)均极显著高于公羊(P<0.01),公羊甘油三酯(TG)和白蛋白(ALB)含量显著高于母羊(P<0.05),其余各项指标均无显著差异(P>0.05)。综上所述,萨杜湖杂交羊在生长发育等方面都有不同程度的改进和提高,本试验结果可为该品种杂交羊进一步开发利用提供参考依据。 相似文献
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对青海的藏羊、青海半细毛羊、新疆细毛羊、牦牛、骆驼以及毛丝鼠的16种毛纤维鳞片进行扫描,分别进行厚度、倾角、高度、密度等测定。结果认为:各种毛纤维随着直径变小,表现出鳞片密度增加,厚度下降;不同畜种的毛纤维鳞片形态及品质有较大差异,但细度接近的毛纤维各测试值接近;在受损程度上,从大到小排列为驼毛、牦牛毛、青海藏羊粗毛;同一毛丛中外层毛的受损程度大于底绒;鳞片之间互相衔接紧密,重叠面深的纤维,鳞片的倾角就小,毛干光滑,光泽强,鳞片相对大、宽、高。 相似文献
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M. Nezamidoust M. Alikhani G. R. Ghorbani M. A. Edriss 《Journal of animal physiology and animal nutrition》2014,98(6):1031-1038
Sulphur‐containing amino acids (SAA) are essential and usually the first limiting amino acids for growth, milk and wool production. The keratin fibre that grows from epidermal tissue is rich in SAA. The rate of fibre growth and its S content are influenced by the availability of SAA. Betaine is a dietary source for a labile methyl group and actively participates in methionine metabolism by donating methyl groups for the remethylation of homocysteine to methionine. Ruminants are capable of synthesizing SAA from inorganic S sources, and most bacteria in the rumen can use inorganic S to meet their requirements for growth. The objective of this study was to examine whether betaine and an inorganic sulphur supplement could provide methyl groups and sulphur amino acids in a way that growth performance and wool production of ewes and lambs are improved. Treatments performed included betaine supplementation, sulphate supplementation and betaine plus sulphate supplementation with five replications for each treatment. The dry matter intake of the ewes was affected by betaine plus sulphate supplementation (p < 0.05). In the ewes, betaine plus sulphate supplementation increased (p < 0.05) the wool growth rate, wool yield, staple length and wool sulphur concentration, while decreasing wool wax and wool yellowness (p < 0.05). In the lambs, wool growth rate, wool yield, fibre diameter, staple length, staple strength, wool sulphur concentration, wool wax and fibre percentage did not differ (p > 0.05) between treatments. In the ewes, plasma methionine concentration increased (p < 0.05) with betaine plus sulphate treatment. No corresponding difference (p > 0.05) was observed in plasma methionine concentration in the lambs. It can be concluded that betaine plus sulphate supplementation has the potential to change wool characteristics in the ewes, while these compounds were without any effect on growth and wool production of the lambs. Combining the two supplements was advantageous. 相似文献
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凉山半细毛羊初生到断奶的5个生产性状（羔羊初生重、羔羊断奶重、初生-断奶日增重、断奶毛长度、断奶毛细度）预测成年羊毛（2．5年）的3个生产性状（成年剪毛量、成年毛长度、成年毛细度）,用Matlab6．5软件构建广义回归神经网络预测模型,并通过预测结果和实测结果的统计分析验证本研究所构建的广义回归神经网络预测模型的有效性。预测结果和实测结果的统计分析结果显示该预测模型具有较高的准确性,基于广义回归神经网络构建的预测模型在凉山半细毛羊成年羊毛3个性状上的预测被证明是有效的。 相似文献