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1.
选择体重、胎次、预产期基本相近的青海高原毛肉兼用半细毛（以下简称青海半细毛羊）妊娠母羊120只,随机分成试验组和对照组,每组60只,在泌乳期内采用牧户传统自配饲料和全价精料补充饲料进行40d的补饲试验。试验表明：40日龄的羔羊只均增重试验组比对照组高0.98kg（P〈0.01）,增重幅度提高34.64%,平均日增重比对照组增加25.33g,提高39.12%（P〈0.0 1）。 相似文献
2.
试验采用放牧+补饲的方式,分别利用玉米秸秆和小麦秸秆全价颗粒饲料在冷季对妊娠后期甘肃高山细毛羊进行补饲,测定妊娠后期母羊体重、血清生化指标、瘤胃液发酵参数及羔羊初生重。试验选取体况相近且健康的妊娠后期母羊60只,随机分为3组,每组20只。试验组补饲营养量根据中国美利奴羊妊娠后期母羊的饲养标准确定（扣除放牧采食量）,试验组Ⅰ补饲小麦秸秆全价颗粒饲料（1.19 kg/（只·d））,试验组Ⅱ补饲玉米秸秆全价颗粒饲料（1.19 kg/（只·d））,对照组按牧民传统方式（玉米0.05 kg/（只·d）、燕麦草0.2 kg/（只·d））补饲,正试期60 d。结果表明,试验组妊娠母羊的平均日增重、羔羊初生重均显著高于对照组（P<0.05）,而两试验组间无显著差异（P>0.05）;试验组妊娠母羊血液总蛋白、白蛋白、葡萄糖、总胆固醇浓度及谷草转氨酶、谷丙转氨酶和乳酸脱氢酶活性均显著高于对照组（P<0.05）;试验组妊娠母羊瘤胃液中总氮、蛋白氮、挥发性脂肪酸浓度和丙酸摩尔比均显著高于对照组（P<0.05）,而乙酸摩尔比显著低于对照组（P<0.05）。综上所述,补饲小麦秸秆或玉米秸秆全价颗粒饲料均可改善妊娠后期甘肃高山细毛羊营养状况,促进羔羊的生长发育。 相似文献
3.
通过妊娠后期青海半细毛羊母羊补饲精料中添加复合预混料的试验,研究复合预混料对母羊生产性能、羔羊初生质量、羔羊成活率及补饲精料利用率的影响.结果表明,试验组羔羊的初生质量比对照组增加0.51 kg(P＜0.05);1和2月龄羔羊体质量比对照组多增质量1.50和2.50 kg(P＜0.05);成活率比对照组提高4.5%;羊粪中粗蛋白、中性洗涤纤维和酸性洗涤纤维含量分别比对照组降低2.37%、5.87%和5.10%(P＜0.05);活质量产值幅度比对照组提高25.18%;扣除补饲料和预混料费用后,比对照组羊只均增加21.9元. 相似文献
4.
试验采用放牧+补饲的方式,分别利用玉米秸秆和小麦秸秆全价颗粒饲料在冷季对妊娠后期甘肃高山细毛羊进行补饲,测定妊娠后期母羊体重、血清生化指标、瘤胃液发酵参数及羔羊初生重。试验选取体况相近且健康的妊娠后期母羊60只,随机分为3组,每组20只。试验组补饲营养量根据中国美利奴羊妊娠后期母羊的饲养标准确定(扣除放牧采食量),试验组Ⅰ补饲小麦秸秆全价颗粒饲料(1.19kg/(只·d)),试验组Ⅱ补饲玉米秸秆全价颗粒饲料(1.19kg/(只·d)),对照组按牧民传统方式(玉米0.05kg/(只·d)、燕麦草0.2kg/(只·d))补饲,正试期60d。结果表明,试验组妊娠母羊的平均日增重、羔羊初生重均显著高于对照组(P0.05),而两试验组间无显著差异(P0.05);试验组妊娠母羊血液总蛋白、白蛋白、葡萄糖、总胆固醇浓度及谷草转氨酶、谷丙转氨酶和乳酸脱氢酶活性均显著高于对照组(P0.05);试验组妊娠母羊瘤胃液中总氮、蛋白氮、挥发性脂肪酸浓度和丙酸摩尔比均显著高于对照组(P0.05),而乙酸摩尔比显著低于对照组(P0.05)。综上所述,补饲小麦秸秆或玉米秸秆全价颗粒饲料均可改善妊娠后期甘肃高山细毛羊营养状况,促进羔羊的生长发育。 相似文献
5.
本试验旨在探讨湖羊妊娠后期补饲颗粒料对母羊繁殖性能、羔羊初生重、断奶重以及经济效益的影响。试验采用随机分组设计,将30头妊娠后期湖羊随机分成对照组和试验组,每组15头,对照组补饲羊场自配粉料,试验组补饲研制的颗粒饲料,两组基础日粮饲喂一致。试验预饲期为10d,正式试验期120d,待羔羊出生后分别测定羔羊初生重和断奶重,统计母羊产羔率和羔羊成活率,并分析不同补饲方式下的经济效益。结果表明,与对照组相比,试验组母羊繁殖率和羔羊存活率分别提高了13%和6%;较对照组相比,补饲颗粒料对羔羊初生重无显著影响(P>0.05),但试验组羔羊平均断奶总重比对照组羔羊提高了2.17kg(P<0.05),试验组羔羊平均日增重(237g/d)比对照组(199g/d)提高了18.15%(P<0.05);补饲颗粒料的经济效益比补饲自配粉料提高了27.91%。试验表明,湖羊妊娠后期补饲颗粒料切实可行,能提升湖羊养殖效益。 相似文献
6.
无角陶赛特公羊与青海半细毛羊杂交效果研究 总被引：4，自引：2，他引：4
在相同的自然条件下.杂一代羔羊初生重平均3.44kg.比青海半细毛羊(3.22kg)提高6.39％.7月龄体重平均为25.17kg；1～7月龄的日增重103.48g.青海半细毛羊日增重为84.67g.比同龄半细毛羔羊提高18.18%；宰前重和胴体重比对照组分别提高16.57％和17.85％。初步认为陶赛特公羊是青藏高原牧区开展商品肉羊生产的理想品种。 相似文献
7.
为了研究柯尔克孜羊羔羊补饲营养调控的效果,选择健康无病、胎次和初生体重相近的羔羊40只,随机分为2组（每组20只）,对照组按传统方式饲喂,试验组从10日龄开始设羔羊补饲栏进行补饲,测定0～60日龄两组羔羊各日龄段的体尺、体重,并分析两组羔羊各日龄段的平均日增重、相对生长率和体尺性状变化。结果表明,试验组羔羊平均日增重0.31 kg,显著高于对照组（0.22 kg）(P<0.05);试验组羔羊60日龄体重23.06 kg,比对照组提高了30.50%;试验组羔羊的体高、体长和胸围均显著大于对照组（P<0.05）。说明柯尔克孜羔羊早期补饲营养调控可以有效地促进羔羊生长。 相似文献
8.
《黑龙江畜牧兽医》2015,(23)
为了研究冷季补饲对阿勒泰妊娠母羊和羔羊生产性能的影响,2012年10月份—2013年8月份在阿勒泰市散德克库木种畜场选择年龄和胎次相同、体重接近的阿拉泰大尾母羊220只,随机分为对照组和试验组,试验组每只母羊每天补饲颗粒料600 g,对照组不补饲。试验羊分娩后测定母羊体重、羔羊初生重、初生体尺及每月体重、体尺指标。试验组母羊分娩的羔羊为试验组,断奶后补饲颗粒料;对照组母羊分娩的羔羊为对照组,不补饲颗粒饲料。结果表明:补饲颗粒料能显著增加母羊分娩体重,显著增加羔羊初生体高、体长和胸围(P0.05);羔羊断奶后补饲颗粒料可显著提高生产性能,120日龄时试验组羔羊体重极显著高于对照组羔羊(P0.01)。说明母羊和断奶羔羊补饲颗粒料可以提高羔羊体尺指标,促进前躯发育水平。 相似文献
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10.
高寒地区补饲复合预混料对放牧绵羊的效果 总被引：1，自引：0，他引：1
于枯草期在青海省门源县5家牧户中选择青海半细毛绵羊100只(其中周岁幼羊80只,怀孕母羊20只),将复合预混料添加于精料及燕麦干草中补饲60～120d.结果表明周岁幼羊试验组比对照组平均每只羊多增重1.45～6.91kg,增加幅度为81.0%～237.4%(P＜0.01),增加纯收益8.77～53.64元,投入产出比为13.1～147;怀孕母羊所产羔羊初生重平均每只羊试验组比对照组增加0.56kg,增幅为17.9%,产后60d比对照组羔羊多增重1.76kg(33%、P＜0.01),增加纯收益13.1元,投入产出比为113.4.表明牧户在自配精料混合料或燕麦青干草中添加复合预混料补饲放牧绵羊,增重效果显著,投入低,产出高,易操作. 相似文献
11.
T. D. Chaniago A. Natasasmita I. C. Fletcher 《Tropical animal health and production》1988,20(1):57-64
The extent to which ewe reproduction could be improved by supplementary feeding around lambing time was investigated with four groups each of 16 ewes which were run continuously with fertile rams until they had lambed three times. One group was fed at a maintenance level throughout and the other three groups were given supplementary feed during the last four week of each pregnancy only, or during the last four weeks of pregnancy plus the first six weeks after each lambing, or during the last four weeks of pregnancy plus the first 12 weeks after each lambing. The average body weight of lambs weaned at 13 weeks of age increased (P less than 0.001) progressively from 6.0 to 9.1 kg with increasing duration of supplementary feeding. There were however no significant differences between treatment groups in mean interval between successive lambings (202 days), ovulation rate (2.26), litter size (1.58), lamb birth weight (1.8 kg), preweaning lamb mortality (37%) or number of lambs weaned per lambing (0.99). 相似文献
12.
为了探讨优良地方品种滩羊最佳产羔季节,从生产发育、羔羊成活率和经济效益3个方面进行研究试验结果表明,试验组羔羊平均初生重3．66kg,1月龄体重8．80kg,3月龄体重16．78kg;对照组羔羊平均初生重3．42kg,1月龄体重9．60kg,3月龄体重18．25kg。冬羔初生重大于春羔,而断奶期生长速度低于春羔。冬羔的成活率为97．5％,春羔为95．8％。3月龄冬羔每只收入402．72元,春羔每只收入401．5元。春羔虽然断奶期日增重高于冬羔,但综合羔羊成活率、经济效益等因素,在甘肃省景泰县饲养优良绵羊品种滩羊冬羔的生产效果和经济效益优于春羔。 相似文献
13.
产羔期、补饲水平对考力代羊生产和繁殖性能影响的研究 总被引：2，自引：1，他引：1
为了研究草地一绵羊系统中草畜供求间的动态平衡，寻求在人工草地放牧条件下适宜的产羔时期及在此时期给产羔母羊的合理补饲水平，１９９０～１９９３年，在贵州省威宁县灼甫联户示范牧场进行了两期产羔期及补饲水平对绵羊生产性能影响的试验。产羔期的改变，导致了母羊及羔羊体重的不同变化趋势。结果显示出母羊体重对其生产、繁殖性能的重要性。春羔母羊配种前体重较之冬羔母羊提高９．７５ｋｇ，两者产羔率分别为１３９．２％和１１６．１％。春羔母羊较高的双羔率导致了春羔母羊较之冬羔母羊更低的繁殖成活率（分别为９１．２％和１０４．７％）。断奶时，春羔较之冬羔体重高５．２５ｋｇ，但断奶以后这种优势即消失了。补饲水平的差异对母羊及羔羊体重有一定的影响，但在牧草丰富的条件下表现得并不很强烈。 相似文献
14.
在环青海湖地区的共和县引进澳大利亚无角陶赛特羊胚胎,以当地青海半细毛羊为受体,进行胚胎移植,结果移植冻胚60枚,产羔28只,移植妊娠率为46.67%,羔羊成活率为100%。羔羊生长发育指标测定结果表明,胚胎移植羔羊平均出生重3.25kg,4月龄前生长发育最为迅速,平均日增重达205.96g,6月龄平均体重32.47kg。 相似文献
15.
Autopsies were performed on lamb carcases from 2 groups of Merino ewes lambing in paddocks in spring 1978 and from 1 group lambing in pens in 1980 in southwest Queensland. These showed that the main causes of death were starvation due to failure of the lamb to obtain milk, problems at parturition causing death during or shortly after birth and, in some cases, predation. The majority of lambs died within 1 week of birth with the highest mortalities occurring in the lighter lambs. In the pen study, mean birth weight of lambs that died was 3.0 (s.d. = +/- 0.5) kg. The mean daily weight loss of lambs that died of starvation in the pens was 0.22 kg and the mean loss to autopsy was 0.35 kg. In the pen study, there were more lamb deaths, deaths from starvation, mismothering and desertion in each of 2 groups fed a below maintenance ration than in an above maintenance group. More lambs died and more lamb deaths were due to starvation in a group with unsound udders than in a sound udder group. The results are similar to those found by workers investigating perinatal lamb mortality in other areas. Their significance is discussed in relation to Merino sheep flocks in southwestern Queensland. 相似文献
16.
A study was conducted to investigate causes of lamb morbidity and mortality on farms and on-station at Debre Berhan during 1989 and 1990. It showed pneumonia (bacterial and/or verminous), starvation-mismothering exposure (SME) complex, gastrointestinal parasites, enteritis, abomasal impaction and physical injuries to be important health constraints on productivity. Neonatal mortalities were 51.5% and 46.3% on farms and on-station respectively and occurred owing to management problems such as SME, abomasal impaction and physical injuries. On the farms the lamb birth weight was 2.56±0.25 kg and was significantly (p<0.05) affected by the dam's age, lambing weight, litter size, sex of lamb and year of lambing, but not by the season of lambing. Birth weight significantly (p<0.05) influenced lamb mortality. Lambs with a low birth weight tended to die from SME. Morbidities and mortalities due to infectious causes increased in older lambs, suggesting that infections were acquired with age when resistance was lowered owing to inadequate nutrition and poor management.Heavy loss of lambs could be overcome by such health management interventions as foster mothering, warming lambs during the cold season and vaccination with polyvalent vaccines against pasteurellosis, clostridial infection andDictyocaulus filaria. 相似文献
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18.
The reproductive performance of 255 Rambouillet (R), Dorset (D), Finnsheep (F) and F1 ewes born in 1978-1979 (group I) and 1979-1980 (group II) and managed in a semiconfinement fall/winter lambing system was evaluated through 4 yr of age of all ewes and through 5 yr for a portion of group I ewes. Ewes were with rams from approximately May 1 to late September each year, with a 2-wk break late in July/early August. Traits considered were fertility (ewes lambed/ewes exposed), lambing date, litter size, lamb survivial and 70-d lamb weights. Breeds and crossbred groups differed significantly in lambing date, with DR crossbred ewes earliest and F ewes latest. Repeatabilities for groups I and II were .31 and .22, .24 and .24 and .11 and .07 for lambing date, fertility and litter size, respectively. There was no significant heterosis in lambing date, although DR ewes in both groups I and II were superior to (D + R)/2, by about 1 wk on average. There was significant positive heterosis for fertility and traits of which fertility is a component in FR ewes in group I, but none in group II. The FD ewes showed negative heterosis for litter size, -.23 (P less than .05) for group I and -.09 for group II. The results indicate: F and FD ewes are not well adapted to the Mediterranean climate where this experiment was conducted; there is little, if any, useful heterosis in crosses among these three breeds for lambing date or other reproduction traits and RD and R ewes are most suitable of the groups tested, while late onset of the breeding season limits the usefulness of even 50% Finnsheep ewes for an autumn lambing system in this environment. 相似文献
19.
The survivability from birth to slaughter of 1,487 Ripollesa lambs with a preslaughter overall mortality of 9.6% was studied under the proportional hazards framework, assuming a Weibull distribution for the baseline hazards function. A sire frailty model was fitted, with the common environment received by the lamb as an additional random source of variation. Common environment was considered time-dependent and was characterized by the dam and the contemporary lamb group during the preweaning and fattening periods, respectively. Only 3 fixed effects were statistically significant: the linear and quadratic effects of birth weight (P < 0.001), the relative position of the delivery within the lambing season (P < 0.001), and the presence of stillbirths or mummified fetuses within the litter (P < 0.05). Birth type and parity of the ewe were significant only when birth weight was removed from the model (P < 0.001 and P < 0.05, respectively). Nevertheless, the model including birth weight became preferable according to the Akaike's information criterion. Survivability dramatically decreased with extreme birth weights, although it reached a survival probability greater than 93.5% within the 3.3 to 5.4 kg range, indicating an optimum birth weight range of Ripollesa lambs for survival purposes. The hazard ratio (HR) increased for births occurring within the last third of the lambing period (HR = 1.70; P < 0.05), as well as for primiparous ewes that lambed in December and January (HR = 5.36; P < 0.001). Survival probability decreased for lambs born from litters with 1 or more stillbirths or mummified fetuses (HR = 1.61; P < 0.05). The variance component estimated for sire variance (0.07) was clearly lower than that of the common environment (1.87), with a heritability estimate of 0.027. 相似文献
20.
In least-squares analyses of variance, 10 ewe lamb traits were used, singly and in various combinations, to predict lifetime production efficiency. Ewes belonged to eight crossbred groups and were raised on two management systems for either 4 or 5 yr of production. Lifetime production efficiency components were total feed and ewe ownership cost, gross income and net revenue. A ewe lamb's type of birth, actual and adjusted weaning weight (WWt and AWWt), postweaning weight (PWWt) and first year gross income (FGROS) were significantly phenotypically related to one or more components of lifetime production efficiency. While triplets were better than either of the other two birth types, single-born ewes were better than twin-born ewes for lifetime production efficiency. Any of the three ewe lamb weights (AWWt, WWt or PWWt) appeared to be an accurate estimator of lifetime production efficiency. The effect of first year productivity was largely a part-whole relationship with lifetime production because the regression coefficients of subsequent lifetime production efficiency (not including first year production) on first year productivity were near zero. Postweaning average daily gain, ewe age at first estrus and date of first lambing (at approximately 12 mo of age) did not have significant relationships with lifetime production efficiency. When type of birth, date of birth, weaning weight and first year gross income were analyzed simultaneously, weaning weight and FGROS had the greatest effect on lifetime production efficiency. When AWWt and type of birth were considered simultaneously, both had significant relationships with lifetime production efficiency. 相似文献