共查询到20条相似文献,搜索用时 546 毫秒
1.
LIU Gang DAI Liang-xian LI Da-xu LIU Xiao-ying YOU Ming-hong BIAN Zhi-gao ZHANG Yu ZHANG Chang-bing ZHANG Li-xia 《四川草原》2007,(7)
基于熵权赋权法,运用灰色系统理论中的灰色关联度法对26个燕麦品种的生产性能进行综合评价,结果表明,生产性能综合表现较好的是初岛燕麦、青永久409、青永久709及青永久316;青永久18综合评价值最低,生产性能最差,其余品种生产性能表现一般。经逐步回归分析,发现其中的绿叶数、叶长、茎叶比、鲜干比、生长速度、叶面积指数、相对生长速率及生长天数8个指标对饲用燕麦生产性能贡献显著。 相似文献
2.
3.
4.
“分段分工有机结合”养猪新模式试验江苏省泰州畜牧兽医学校樊跃,章桂武为了转变养猪生产经营机制,探索适应市场经济,科技与生产、流通有机结合的新型养猪模式,特进行了本试验。试验一是根据仔猪、生长猪、育肥猪三个不同生长阶段的特点及对饲养管理的不同要求,采取... 相似文献
5.
6.
肉用仔鸡生长曲线的拟合及最大经济效益点的研究 总被引:17,自引:0,他引:17
肉用仔鸡生长曲线的拟合及最大经济效益点的研究樊月钢,叶树真(南京市上海梅山冶金公司烧结厂养殖场210039)前言肉用仔鸡有其特定的生长规律、生长转折点和最佳上市周龄及最大经济效益点,因此在生产中,迫切需要对公、母肉用仔鸡的生长规律进行数学模拟,并结合... 相似文献
7.
添加药物的饲料对促进动物生长、保障动物健康和提高生产性能及经济效益起到了重要作用,同时也不可避免地造成了饲料源药物残留的产生。笔者就肉鸡饲料生产、使用各环节与兽药残留的监控对策进行了论述。 相似文献
8.
9.
10.
本试验不同杂交组合北京鸭在自然育肥条件下生长速度、饲料转化率及肉用性能进行了比较研究。结果表明,BC杂交组合效果最好,可用于商品生产。 相似文献
11.
半胱胺在畜禽生产中的应用研究 总被引:3,自引:0,他引:3
半胱胺(Cysteamine,Cs)可提高动物体内生长激素的水平,促进动物生长。本文介绍了半胱胺的性质、作用机理及其在畜禽生产中的应用。 相似文献
12.
The aim of the present study was to investigate the effect of cysteamine on growth performance of preweaning piglets and gastric expression of ghrelin mRNA in vivo and in vitro. Twelve litters of newborn piglets were allocated randomly to control and treatment groups. From 15 d of age, piglets in the control group were fed basal creep diet, whereas the treatment group received basal diet supplemented with 120 mg cysteamine per kg of diet until weaning on 35 d of age. Body weight gain, creep feed consumption, and diarrhea rates were recorded, and gastric mucosal tissues were collected for quantifying mRNA expression. To evaluate the direct effect of cysteamine on gastric ghrelin expression, primary cultures of gastric mucosal cells isolated from 35-d-old piglets were exposed to cysteamine for 20 h at 0, 1, 10, and 100 μg/mL, respectively. Dietary cysteamine increased (P < 0.05) average daily creep feed consumption and BW gain in preweaning pigs, which was accompanied by reduction in diarrhea rates. At 35 d of age, piglets treated with cysteamine showed increased (P < 0.05) ghrelin and gastrin and decreased (P < 0.05) somatostatin mRNA expression in gastric mucosa. Moreover, dietary cysteamine treatment increased serum concentration of gastrin (P < 0.05). In vitro, cysteamine significantly increased ghrelin mRNA expression in gastric mucosal cells at the concentration of 10 μg/mL. In conclusion, dietary cysteamine is effective in improving the growth performance and health condition of preweaning piglets, which is associated with its stimulatory effects on gastric ghrelin mRNA expression both in vivo and in vitro. 相似文献
13.
本试验研究了半胱胺(CS)和大豆黄酮(Da)对杜×长×大生长肥育猪生长性能和胴体性状的影响,结果表明:这两种物质均具有显著促进猪生长作用,且在猪生长期的促生长效果好于肥育期.二者能提高胴体瘦肉率4%以上,脂肪率下降9%. 相似文献
14.
15.
通过饲养试验和消化试验的方法,确定美国鹧鸪饲料中半胱胺的最佳添加剂量及添加间隔时间,详细研究和分析了半胱胺对美国鹧鸪体增重、饲料转化率、能量代谢率、蛋白质沉积率的影响情况,从中筛选出了对美国鹧鸪生长及代谢的半胱胺添加剂量与添加间隔时间的最佳组合。 相似文献
16.
半胱胺颗粒料促进羔羊增重的试验 总被引:7,自引:0,他引:7
为观察半胱胺颗粒料对羔羊增重的影响,用3日龄羔羊30只,随机分成试验组和对照组各15只,试验组每周喂1次CS颗粒料,观察8周,结果试验组比对照组增重提高13.0%(P〈0.01),表明半胱胺颗粒料具有促生长作用。 相似文献
17.
半胱胺对生长肥育猪胴体品质的影响及其机理探讨 总被引:16,自引:0,他引:16
在生长肥育猪的生长期和肥育期日粮中分别添加 6 0mg/kg半胱胺和 75mg/kg半胱胺 ,经屠宰试验表明 :胴体瘦肉率提高 4 .6 3% (P <0 .0 5 ) ,胴体脂肪率降低 8.5 3% (P <0 .0 5 ) ,同时第 10肋背膘厚降低 10 .17% (P >0 .0 5 )。在日粮中添加半胱胺使血清中生长激素 (GH)和三碘甲腺原氨酸 (T3 )含量分别提高 2 4 .4 4 % (P <0 .0 5 )和 2 1.31% (P <0 .0 5 )。添加半胱胺能显著提高皮下脂肪激素敏感脂酶 (HSL)活力 38.2 3% (P <0 .0 5 ) ,有降低苹果酸脱氢酶、葡萄糖 6 磷酸脱氢酶、异柠檬酸脱氢酶活性的趋势。研究结果显示 ,半胱胺可能通过增加血清GH含量和提高HSL活力来影响胴体品质。 相似文献
18.
19.
Influence of Cysteamine on In Vitro Maturation, In Vitro and In Vivo Fertilization of Equine Oocytes
S Deleuze CS Dubois M Caillaud B Bruneau G Goudet G Duchamp 《Reproduction in domestic animals》2010,45(1):1-7
The effect of cysteamine on in vitro nuclear and cytoplasmic maturation of equine oocytes collected by transvaginal ultrasound guided follicular aspiration was assessed. Oocytes were matured in vitro with (cysteamine group) or without (control group) cysteamine. The nuclear stage after DNA Hoechst staining, penetration rates after two different in vitro fertilization (IVF) techniques (IVF media with ionophore and Hepes buffer with heparin) and the embryo yield following oocyte intra-oviductal transfer were used as a criterion for assessing nuclear and cytoplasmic maturation, respectively. Contrary to the data described in other domestic species, there was no effect of cysteamine on in vitro nuclear maturation, IVF or in vivo embryonic development under our conditions. Ovum pick up yields (52%) and maturation rates (control group: 47% and cysteamine group: 55%) were similar to those previously reported. From 57 oocytes transferred to the oviduct in each group, the number of embryos collected was 10 (17%) in the control group and five in the cysteamine group (9%). Those two percentages were not statistically different (p > 0.05). No effect of IVF technique was seen on the success rate (6%) in each group. 相似文献