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1.
重量法对青海细毛羊、半细毛羊不同剪毛量区段的含硫量进行了测定和统计分析。结果表明 ,青海细毛羊成年母羊 4.0 0kg区段含硫量最高 ,一岁母羊 2 .0 0kg区段含硫量最高。青海半细毛羊成年公羊 4.5 0kg区段含硫量最高 ,一岁公羊 3 .0 0kg区段含硫量最高。同品种年龄内剪毛量区段间含硫量差异不显著 (P >0 .0 5 )。剪毛量区段与硫的含量间存在弱的负相关 ,相关系数为 -0 .3 615 3。  相似文献   

2.
张腊梅 《四川畜牧兽医》2002,29(9):25-25,27
通过对青海半细毛羊羊毛纤维长度方向1cm区段含硫量的测定。结果表明青海半细毛羊纤维不同长度区段的含硫量不同,含硫顶峰值公羊1岁9cm,2岁14cm,成年14cm,母羊1岁12cm,2岁8cm,成年10cm。毛纤维垂直方向上,中,下三段中,含硫量以中段最高。二岁公羊毛长与含硫量的正相关,相关系数R=0.75735,一岁母羊呈中等正相关,R=0.31762,其余各性别年龄组内呈弱的负相关,相关系数为R=-0.01016-0.23774。  相似文献   

3.
通过对青海细毛羊羊毛纤维长度方向1cm区段含硫量进行了测定。结果表明,青海细毛羊羊毛纤维不同长度区段的含硫量不同,含硫顶峰值公羊一岁8cm、2岁7cm、成年6cm;母羊1岁8cm、2岁7cm、成年9cm。毛纤维垂直方向上、中、下三段中,中段含硫量最高。毛长与含硫量除1岁公羊为强的正相关(R=0.703 155)外,其余各性别、年龄组均为弱的和中等负相关,相关系数R为-0.00511~-0.79013。  相似文献   

4.
青海半细毛羊不同区段羊毛含硫量的测定   总被引:1,自引:0,他引:1  
运用重量法对不同性别的青海半细毛羊羊毛上、中、下三段中的含硫量进行了测定。结果表明 :羊毛的含硫量在 2 .16%~ 2 .3 7% ,且不同区段羊毛的含硫量具有一定的规律性 :公羊中段较高、上段较低、下段居中 ;母羊中段较高、下段较低、上段居中 ,同性别羊只羊毛各区段的含硫量均无显著差异 (P >0 .0 5 )。  相似文献   

5.
通过对终年放牧的青海藏羊毛纤维长度5cm区段含硫量的测定,结果表明青海藏羊毛纤维不同长度区段的含硫量不同,含硫量顶峰值前,随着长度增加含硫量逐步增加,但成年公羊顶峰值后随机度增加,含硫量逐渐减少。青海藏羊毛长5cm各区段各硫量差异不显著(P>0.05),毛长与含硫量除成年公羊为强的负相关(r=-0.56964),其余各性能年龄组内均为弱的正相关关系,相关系数r=-0.116182-0.354898.  相似文献   

6.
采用 FSH、L H、PMSG、氟孕酮阴道海绵栓等激素进行超数排卵 ,通过人工授精、手术采卵、同期发情、胚胎移植、B超妊娠检查等技术 ,共处理优秀美利奴母羊 4 5 6只 ,获得可用胚胎 (A、B、C级胚胎 ) 30 33枚 ,平均 6 .6 5枚 /只(30 33/ 4 5 6 ) ,移植受体母羊 2 333只 ,冻胚受孕率 4 7.0 2 % (10 97/ 2 333) ,产羔数 14 2 6只 ,产羔率 12 9.99% (14 2 6 /10 97)。其中 ,公羔 6 85只 ,母羔 74 1只。优质细毛羊初生重公羔平均 4 .4 5 kg,母羔平均 4 .6 1kg。断奶重公羔平均38.2 4 kg,母羔平均 33.6 8kg。 12月龄平均体重公羊 76 .15 kg,母羊平均 6 2 .15 kg。周岁毛长公羊平均 11.6 7cm,剪毛量平均 12 .0 4 kg;母羊毛长平均 11.12 cm ,剪毛量平均 7.6 5 kg;平均净毛率达到 6 8.5 %。 2岁公羊体重平均 10 6kg,毛长平均 11.5 cm,剪毛量平均 11.85 kg,净毛率 6 9.5 %。2岁母羊体重平均 72 kg,毛长平均 11.0 cm,剪毛量平均8.5 kg,净毛率 6 9.0 6 %。羊毛纤维平均细度 18.71μm。 3岁公羊最大体重 14 8kg,母羊最大体重 10 2 kg。优质细毛羊新类群同期上述各项指标均显著或极显著高于中国美利奴羊  相似文献   

7.
国家“九五”重点科技攻关项目“48~ 5 0支半细毛羊品种选育与提高”经过五年的实施 ,选育出特一级羊 6994只 ,等级羊 5 0 9万只 ,基础母羊 6 94万只 ,项目区内羊群规模达 13 3 6万只。成年公羊、成年母羊平均体重分别为 88 70kg和5 4 13kg ,剪毛量 6 81kg和 4 76kg ,羊毛长度 17 43cm和 14 95cm ,成年母羊产羔率 110 3 %~ 12 5 7% ,净毛率 71 8%。  相似文献   

8.
经过系统的体尺体重及屠宰测定和繁殖性能统计结果表明 ,简阳大耳羊是一个具有生长速度快、体格高大、繁殖能力强、屠宰率高、产肉性能好的肉用山羊品种。初生公羔重 3 2 6kg ,母羔2 89kg ;0~ 2月龄日增重公羊达 185 32 g ,母羊达到 15 7 0 0g ;周岁公羊和 1~ 6月龄母羊均可保持10 0 g以上的日增重。成年 (2 4月龄 )公羊体重平均达到 6 8 12kg ,成年母羊平均体重达到 4 7 5 3kg ,成年公羊体高平均达到 79 31cm ,成年母羊体高平均达到 6 7 0 3cm。 7月龄公羊屠宰率达到4 9 6 2 % ,净肉率 38 79%。一年产仔 1 75窝 ,第一窝产仔平均 1 5 3只 ,二至五胎平均产仔 2 17只。  相似文献   

9.
对波德代羊在甘肃永昌肉用种羊场的生长发育和生产性能测定和分析 ,结果为 ,波德代羊羔羊平均初生重 :公羔 (4 .87± 0 .87)kg、母羔 (4 .4 1± 1.0 4 )kg ;断奶重 :公羔 (2 4 .15± 4 .2 9)kg、母羔 (2 2 .79± 3.95 )kg;成年体重 :公羊 (12 7.86± 8.4 0 )kg,母羊 (82 .17± 9.2 6 )kg ;剪毛量 :成年公羊 (9.4 9± 0 .4 4 )kg ,成年母羊为 (6 .36± 0 .92 )kg ;波德代羊繁殖性能 :公羊精液品质优良。母羊发情季节集中 ,平均产羔率为 177.2 %。结果表明波德代羊生长性能达到或超过原产地水平 ,体现了对永昌地区具有较好的适应性  相似文献   

10.
小尾寒羊是我国地方绵羊良种之一,属于性成熟早、生长发育快、繁殖力高、肉用性能好的半粗毛羊种。小尾寒羊头显略长,鼻梁隆起,耳大下垂,被毛白色者居多。公羊有角,呈三棱形螺旋状;母羊多数有小角或角根,颈较长。平均体重成年公羊约58kg,母羊约为38kg。年剪毛两次,平均剪毛量公羊为2kg,母羊为1.5kg。一年两胎或两年三胎,在4~5月或9~10月产羔,产羔率平均270%左右,属我国地方绵羊品种之首。  相似文献   

11.
通过藏羊类型间的杂交选育试验,选育后试验组F1代1.5岁公羊平均体重35.24kg,母羊平均体重34.93kg,比同龄对照组公羊平均体重32.07kg,母羊平均体重31.62kg,分别提高3.17kg,3.31kg,增重效果显著(P<0.05)。组内公母羊体重差异不显著(P>0.05);羊毛花色率明显提高(P<0.01);产毛量与羊毛质量有所下降。  相似文献   

12.
作者对贵德黑裘皮羊主要生产性能进行了测定,结果:成年公、母羊体重、产毛量、毛辫长度分别平均为49.65、39.96kg、1.75、1.45kg和26.65、24.15cm;羔羊初生重、羔羊日增重、4月龄羔羊断奶重公、母羔分别平均为2.87,2.89kg,0.12,0.12kg和12.95,10.43kg;小羔皮皮板面积平均为642.13cm,卷花形状:环形、半环形、波浪形、无花形分别占29.0,51.4,18.6,1.0%,与20年前相比,除产毛量外,其它主要形状有明显的下降趋势。  相似文献   

13.
Variance components for greasy fleece weight in Rambouillet sheep were estimated. Greasy fleece weight was modeled either as repeated measurements on the same trait or as different traits at different ages. The original data were separated according to the age of the ewe at shearing into three classes; 1 yr, 2 and 3 yr, and older than 3 yr. An animal model was used to obtain estimates of genetic parameters with a REML algorithm. Total numbers of animals in pedigrees for the different age classes were 696, 729, and 573, respectively, and 822 for the repeated measures model across ages. The animal model included direct genetic, permanent environmental, and residual environmental random effects and fixed effects for age of ewe, shearing date as contemporary group, and number of lambs born. Days between shearings was used as a covariate. Single-trait analyses were initially done to obtain starting values for multiple-trait analyses. A repeated measures model across ages was also used. Estimates of heritability by age group were .42, .50, and .58 from three-trait (age class) analyses and for the repeated measures model the estimate was .57. Estimates of genetic correlations between fleece yields for 1 yr and 2 and 3 yr, 1 yr and >3 yr, and 2 and 3 yr and >3 yr classes were .88, .89, and .97, respectively. These estimates of genetic correlations suggest that a repeated measures model for greasy fleece weight is adequate for making selection decisions.  相似文献   

14.
The influence of body weight at breeding on reproductive response to one and two artificial inseminations (AI) of fresh extended semen was assessed in 195 crossbred ewe lambs selected for early breeding and compared with 159 adult ewes, all housed indoors in a controlled environment. In six trials, ewe lambs and adult ewes in progestogen-induced estrus were inseminated 55 to 57 h after sponge removal. One-half of the lambs and one-fourth of the adults received a second insemination at 60 h. Resultant reproductive performance of both groups indicated no advantage in a double insemination. Overall fertility, litter size and fecundity after one and two inseminations were 33%, 1.7 and .6 for ewe lambs and 68%, 2.4 and 1.6 for adult ewes, respectively. Embryonic mortality after the first 2 wk of pregnancy was estimated at 24% for ewe lambs and 9% for adults. The influence of body weight was analyzed by grouping the ewe lambs according to body weight at breeding. The lambs in group 1 weighed 30 to 35 kg; group 2, 36 to 40 kg; group 3, 41 to 45 kg and group 4, 46 to 50 kg. The proportion of ewes lambing in groups 1, 2, 3 and 4 was 16, 34, 39 and 48%, respectively. Corresponding litter sizes were 1.4, 1.6, 1.8 and 2.0. Fecundity increased (P less than 01) from .2 in group 1 to 1.0 in group 4. The results indicate that even when ewe lambs are bred by AI (eliminating a ram behavioral problem), sheep with heavier body weights produce more lambs per ewe bred.  相似文献   

15.
凉山半细毛羊育成期生长发育的研究   总被引:1,自引:0,他引:1  
凉山半细毛羊 4月龄公、母羔体重在 2 6kg以上 ,哺乳期内生长迅速 ,一月龄日增重接近 30 0g ,哺乳期内近 2 0 0g。随着年龄增长 ,生长速度逐渐变慢 ,5~ 1 2月龄公、母羔日增重分别降至 80 8g和 5 7 9g。1 5岁时公、母羊体重分别达到 60 4kg和 46 1kg。 2 5岁成年母羊体重 5 4 5kg。  相似文献   

16.
Based on the results of participatory approaches to define traits in the breeding objectives, four scenarios of ram selection and ram use were compared via deterministic modelling of breeding plans for community-based sheep breeding programmes in four diverse agro-ecological regions of Ethiopia. The regions (and production systems) were Afar (pastoral/agro-pastoral), Bonga and Horro (both mixed crop-livestock) and Menz (sheep-barley). The schemes or scenarios differed in terms of selection intensity and duration of ram use. The predicted genetic gains per year in yearling weight (kilograms) were comparable across the schemes but differed among the breeds and ranged from 0.399 to 0.440 in Afar, 0.813 to 0.894 in Bonga, 0.850 to 0.940 in Horro, and 0.616 to 0.699 in Menz. The genetic gains per year in number of lambs born per ewe bred ranged from 0.009 to 0.010 in both Bonga and Horro. The predicted genetic gain in the proportion of lambs weaned per ewe joined was nearly comparable in all breeds ranging from 0.008 to 0.011. The genetic gain per year in milk yield of Afar breed was in the order of 0.018 to 0.020 kg, while the genetic gain per generation for greasy fleece weight (kg) ranged from 0.016 to 0.024 in Menz. Generally, strong selection and shorter duration of ram use for breeding were the preferred options. The expected genetic gains are satisfactory but largely rely on accurate and continuous pedigree and performance recording.  相似文献   

17.
本试验表明,湖羊具有一母哺双、三羔的潜力,以60日龄断奶窝重测量,哺三羔(40.88公斤)、哺双羔(29.50公斤)分别是哺单羔(15.62公斤)的2.62倍和1.89倍。断奶后继续肥育120天,增重速度、屠宰率、净肉率和眼肌面积都是公羔优于母羔。全期试验表明湖羊多羔肥育可获得较高的经济效益。肉质分析指出,湖羊肥羔肉含高蛋白、低脂肪,氨基酸齐全,总含量高,婴儿必需氨基酸、成人必需氨基酸及赖氨酸占总含量的百分率分别高达50.89%、37.35%和11.85%。  相似文献   

18.
为了研究波尔山羊与河南淮山羊杂交羊的生长发育情况以及肌肉品质特性,本研究采用生长性能常规测定以及国标法和组织化学染色法对舍饲条件下的波淮杂交羊的体重体尺指标、屠宰性能、胴体肌肉的常规营养成分(水分、粗蛋白质、粗脂肪、粗灰分、钙、磷、镁、铁和硒)、17种氨基酸含量和不同部位(臂三头肌、股二头肌、背最长肌)肌肉的纤维组织特性(肌纤维直径、肌纤维密度)进行测定分析。结果显示,波淮杂交羊初生阶段公羊体重、体斜长、体高、管围均显著高于母羊(P<0.05);1月龄、3月龄和6月龄时公羊体重、体斜长、体高和胸围均显著高于母羊(P<0.05);1岁以及1.5岁时公羊体重和体尺等指标均显著高于母羊(P<0.05)。6月龄屠宰的波淮杂交羊公母羊胴体重分别为12.94和11.33 kg,屠宰率分别为49.01%和48.34%,屠宰性能的各项指标均差异不显著(P>0.05)。胴体肌肉中水分、粗脂肪、粗蛋白质、粗灰分分别占比71.00%、2.10%、19.17%和2.31%,胆固醇含量为62.93 mg/100 g;镁、钙、铁、硒、磷的含量分别为248.00、40.57、17.00、0.08、210.12 mg/kg。赖氨酸、组氨酸、精氨酸占FAO指标比例分别为123.87%、140.42%、102.88%,这3种氨基酸含量均高于FAO/WHO(理想蛋白模式)的评价标准;苏氨酸、亮氨酸占FAO指标分别为86.80%、82.00%,与FAO理想蛋白模式的氨基酸含量差距不大。苯丙氨酸占FAO指标的36.90%,与FAO理想蛋白模式的氨基酸含量差距较明显。臂三头肌的肌纤维直径(39.98 μm) > 股二头肌的肌纤维直径(36.53 μm) > 背最长肌的肌纤维直径(27.06 μm)。本试验结果表明,舍饲条件下波淮杂交羊屠宰性能较好,肌肉中的氨基酸、蛋白质、脂肪和主要几种矿物质含量丰富,肌肉中脂肪呈现大理石纹状分布,为下一步地方山羊品种的杂交改良和优质羊肉产品开发提供了参考依据。  相似文献   

19.
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