大额牛,云南瘤牛屠宰性能研究   总被引：4，自引：0，他引：4  

葛长荣  陈韬  袁希平 《中国牛业科学》1996,22(3):31-33

试验对小型大额平，云南瘤牛各4头公牛进行肉用性能研究，供试牛的平均年龄3．5±0．5岁。大额牛宰前活重149．0±19．0千克，胴体重78．18±8．82千克，净肉重59．28±7．92千克，屠宰率52．56±0．78％，净肉率39．76±0．24％，眼肌面积49．84±14．82厘米2；云南瘤牛宰前活重324．5±28．5千克，胴体重165．91±16．29千克，净肉重130．05±15．55千克，屠宰年51．08±1．53％，净肉率39．97±1．29％，眼队面积76．07±3．6厘米2。结果表明：两个品种在放牧条件下均具有较好的产肉性能和良好的肉质，是优良的地方牛种。  相似文献   

Economic Valuation of Varieties and Breeding Objectives     

P. Müller  J. Zeddies 《Plant Breeding》1988,100(1):59-70

Breeding planning and variety valuation can be supported only if weighting factors for the economically relevant performance traits are available. In plant breeding they are necessary for the calculation of selection indices as well as for the comparison of varieties and for quantifying the monetary impact of breeding progress. In this article the economic weights for the most important performance traits of sugar beet are calculated from the farmer's, the sugar factory's, and the national economy's point of view. Based upon economic weights for beet yield, sugar content, potassium, sodium, and ammo nitrogen content, a total of 19 varieties was compared with regard to physical and economic performance. The investigation shows that “best” and “worst” varieties differ in gross margin per ha by 270.— to 330.— DM. Indications were given for possibilities and limitations of the application of economic weights in breeding planning.  相似文献   

Genotype × Environment Interaction in the Andean Grain Crop Quinoa (Chenopodium quinoa) in Temperate Environments     

J. Risi  N. W. Galwey 《Plant Breeding》1991,107(2):141-147

Ten varieties of quinoa with origins ranging from latitude 39° S to 12° S and from sea level to an altitude of 3,800 m were grown on two soil types in two years in Cambridgeshire, England, in order to assess the extent and nature of genotype × environment (G × E) interactions and identify genotypes suited for cultivation at temperate latitudes. There was evidence that varieties differed in their susceptibility to water logging during germination. Plant height was strongly influenced by competition with weeds, and varieties differed in their susceptibility to this. The number of days to anthesis and to maturity were strongly dependent on the variety, but these periods were generally longer following an earlier sowing. The grain yield was also strongly dependent on the variety, but weed competition, a micronutrient deficiency and bird damage affected the varieties differently. Varieties originating at high latitudes gave the highest yields, about 5,000 kg/ha. Earliness and yield were strongly associated at the level of variety means, but the pattern of G × E interaction differed among the variables measured.  相似文献   

饲喂IgG对仔猪血液生化指标和生产性能的影响   总被引：3，自引：0，他引：3  

滑静  曹永春  万善霞  张淑萍  门瑞霄 《黑龙江畜牧兽医》2004,(7):13-15

试验分两批选用 12 0 ,6 0头大白仔猪 ,出生 2 4h之内饲喂不同剂量的免疫球蛋白制剂 0 ,4 80 ,96 0mg ,均吮食初乳。于仔猪 5 ,10 ,15日龄前腔静脉采血 ,测定血清总蛋白、血清IgG、血清碱性磷酸酶和血红蛋白含量 ,并测定仔猪断奶时增重 ,哺乳前、后期平均日增重。结果表明 :饲喂不同水平的IgG ,仔猪 5 ,10日龄血清总蛋白、血清碱性磷酸酶活性和血红蛋白含量均显著高于对照组 (P <0 0 5 )。饲喂高水平IgG(96 0mg)的仔猪 ,5日龄血清IgG水平显著高于对照组 (P <0 0 5 )。哺乳前期 (0～ 15日龄 )各处理组仔猪平均日增重显著高对照组 (P <0 0 5 ) ,断奶时增重也显著高于对照组 (P <0 0 5 )。  相似文献   

秸秆氨化与精料添加对羔羊生产性能的影响   总被引：3，自引：0，他引：3  

孟庆翔  熊易强 《畜牧兽医学报》1993,24(1):23-28

本文报道了小麦秸氨化与精料添加对羔羊生产性能影响的研究结果。麦秸氨化提高了羔羊日增重、秸秆与日粮进食量及精料转化效率,但其提高幅度随日粮精料添加量的提高而减小。提高日粮精料添加水平,羔羊日增重与日粮绝对进食量提高,但精料转化效率在氨化与未氨化组呈不同规律变化:未氨化组持续提高,氨化组呈二次曲线规律变化,且“精料/增重”比最低的日粮精料水平为45％。  相似文献   

高钙日粮对蛋鸡生产性能及出壳雏体内锌含量的影响     

邓俊良  王哲  李毓义  朱连勤 《中国兽医学报》1991,(2)

生长期日粮钙>3.11%,可使蛋鸡性成熟期明显延缓,开产日龄推迟;其蛋锌及子代出壳雏血锌和多数组织锌含量明显降低,但胚胎及出壳雏鸡未见畸变.出壳雏血锌含量能反映体内锌状态,可作为其评价指标.产蛋期高钙(6.11%)或低钙(0.83%)日粮均可使产蛋性能及孵化率降低.  相似文献   

中草药饲料添加剂——蛋壳素对蛋鸡产蛋性能及蛋壳质量的影响     

刘广海  刘海江 《水禽世界》2003,(2):12-13

试验选用正在产蛋的800只罗曼鸡群,分组饲喂中草药饲料添加剂——蛋壳素,对生产性能进行测定,试验结果表明,在罗曼产蛋日粮中添加0.02%的蛋壳素与对照组(不添加蛋壳素组)比较:①产蛋量提高6.41%～6.5%;②平均蛋重每枚增加0.55～1.1g;③破蛋率降低2.5%;④饲料转化率提高6.9%～7.28%。另外,蛋壳表面光滑、鲜艳、无沙皮蛋。  相似文献   

儿茶素在家兔体内的药物动力学及生物利用度研究   总被引：1，自引：0，他引：1  

刘湘新  何湘蓉  程天印  林亲录  孙志良  许建平 《中国兽药杂志》2003,37(2):13-15

对家兔单剂量静注和灌服儿茶素 (Catechin) 2 5mg/kg体重各 5只。用高效液相色谱法测定其血药浓度。房室模型分析表明静注给药后的药时数据符合无吸收二室开放模型 ,主要动力学参数为 :t1 / 2α=( 0 .1 5± 0 .0 1 )h ,t1 / 2 β=( 0 .5 8± 0 .0 2 )h ,Vc=( 1 .41± 0 .0 8)L ,Vβ=( 2 .97±0 .1 1 )L ,ClB=( 3.5 3± 0 .1 0 )L/h ,AUC =( 1 6.95± 1 .5 2 )mg/(L·h)。灌服儿茶素的药时数据符合一级吸收一室开放模型 ,主要药物动力学参数为 :t1 / 2Ka=( 0 .39± 0 .0 6)h ,t1 / 2Ke=( 0 .79±0 .1 1 )h ,tmax=( 0 .78± 0 .1 1 )h ,Cmax=( 3.35± 0 .1 6)mg/L ,AUC =( 7.45± 0 .94)mg/(L·h) ,F =( 4 4.1 8± 3.5 9) %。儿茶素在健康家兔体内的药动学特征是 :吸收迅速 ,达峰时间短 ,消除快 ,半衰期短 ,表观分布容积较大 ,口服摄入吸收不完全  相似文献   

干湿饲喂器对仔猪生产性能的影响     

洪奇华  陈安国 《家畜生态》2003,24(3):30-33

试验采用单因子随机设计,选取体重20kg左右的杜大长三元杂交猪168头,按体重、性别基本一致分成二组,每组四个重复。试验组应用干湿饲喂器,对照组应用水泥料槽。为期30天的饲养试验表明,应用干湿饲喂器能显著提高仔猪的平均日采食量6.5%(P<0.01)、平均日增重16.9%(P<0.01)和显著降低平均料重比7.0%(P<0.01);能明显提高仔猪饲料的总能表观消化率3.9%(P<0.05)和粗蛋白表观消化率6.1%(P<0.05)。对血清中常规指标测试表明,应用干湿饲喂器能显著提高仔猪血清中碱性磷酸酶活性25.9%(P<0.05)和胃泌素含量65.8%(P<0.05)以及显著降低血清中皮质醇含量40.8%(P<0.05);有提高血清中葡萄糖、总蛋白和降低尿素氮含量的趋势。  相似文献   

EM制剂对鸡的生长性能与鸡粪除臭效果的影响     

王军  汪植三 《家畜生态学报》2001,22(2):22-26

探讨了EM制剂对AA鸡的生长性能以及鸡粪除臭的影响。试验对象为经过共同饲养18日龄的AA肉鸡，进行初次称重，并按其体重交叉分组法均匀分为五组(CK对照组、A、B、C、D试验组)，对照组饲料不添加EM制剂，试验组A、B、C三组添加2/1000由华南农大动科系生态实验室提供的EM制剂，D组添加2/1000台湾产亚罗康商品活菌制剂。整个实验期为22d。结果表明，EM制剂不能使鸡的增重、屠宰率、全净膛率有明显的提高，但能增强鸡对疾病的抵抗，能提高成活率和饲料报酬，明显地降低鸡粪的臭味。  相似文献