欧盟对动物促生长剂的措施及其对畜牧业的影响   总被引：4，自引：0，他引：4  

M.万培拉 《中国饲料》2001,(13):29-31

欧盟专员 Ｆｒａｎｚ Ｆｉｓｃｈｌｅｒ于 １９９５年 １１月 ２９～３０日和１２月１日在布鲁塞尔组织了关于肉类生产中使用生长促进剂的科学研讨会。此后有关抗生素作为饲料添加剂的一场新的争论又开始了。同时对同化激素和生长激素类促生长剂的应用前景也展开了争论。禁用生长激素的理由，是否有科学的依据？对于中国畜牧业会有什么潜在的影响？本文将就欧盟禁用动物促生长剂产品的科学依据以及对中国畜牧业有什么影响作一探讨。１同化激素和生长激素是否有应用前景 让我们首先回顾一下同化激素（促合成代谢剂ａｎａｂｏｌｉｃ ｏｇｅｎ…  相似文献   

Thrombocyte aggregation in the cat     

S Hart  I Nolte 《Tier?rztliche Praxis》1991,19(4):413-418

Platelet aggregation in healthy and sick cats after adding various aggregating agents is described. Feline platelets aggregate irreversibly in response to 0.15-1.0 micrograms/ml collagen, 1 microM ADP, 0.3 IU/ml test-thrombin and 0.71 NIH/ml Topostasin. Epinephrine, ristocetin and kaolin failed to cause aggregation. The aggregation function was decreased in a cat with liver damage and icterus; in 2 cats with uremia platelet aggregation was normal. Acetylsalicylic acid (ASA) (10 mg/kg iv) inhibits platelet aggregation in the presence of collagen in low concentrations; high concentrations of collagen succeeded in inducing platelet aggregation.  相似文献   

The Effect of Diet on the Biochemical Composition of Juvenile Artemia: Potential Formulations for Rock Lobster Aquaculture     

Matthew M.  Nelson Ben D.  Mooney Peter D.  Nichols Charles E  Phleger Greg G.  Smith Piers  Hart Arthur J.  Ritar 《Journal of the World Aquaculture Society》2002,33(2):146-157

The lipid class and fatty acid (FA) composition of juvenile Artemia fed continuously on four diets—the microalga Tetraselmis suecica , a mix of oat bran-wheat germ-lecithin (OWL), OwL-eicosapentaenoic acid (EPA), and OWL-EPA-arachidonic acid (AA)—were examined over a 9-d experiment in an attempt to approximate the FA profile of phyllosoma larvae of wild southern rock lobster Jasus edwardrii . The main difference in lipid class composition of Artemia fed the four diets was the relative level of polar lipid (PL) and triacylglycerol (TAG). By day 9, the algal-fed Artemia were highest in PL (95% of total lipid) and lowest in TAG (2%), whereas the remaining diets resulted in Artemia with 16–30% PL and 41–82% TAG. After 2 d, the relative FA composition of all Artemia treatments closely reflected those of the diets, with no marked change after further feeding (to day 9). In terms of the content of essential polyunsaturated fatty acids (PUFA), by day 5 Artemia fed: 1) with the algal diet contained 7 mg/g FA dry mass (0.3% DHA, 6.3% EPA, 3.4% AA of total FA); 2) with the OWL diet contained 3 mg/g (0.3% DHA, 0.9% EPA, 0.7% AA); 3) with the OWL-EPA diet contained 55 mg/g (6.2% DHA, 11.6% EPA, 1.1% AA); and 4) with the OWL-EPA-AA contained 83 mg/g (3.8% DHA, 7.5% EPA, 17.4% AA). The PUFA profiles of Artemia using the OWL-oil diets were similar to wild rock lobster phyllmmata, although levels of doco-sahexaenoic acid (DHA) were lower (10% DHA) than in J. edwardsii larvae. On the basis of PUFA composition data alone, the results suggest the suitability of the OWL-oil mixed diets for consideration for feeding to Artemia used in the culture of southern rock lobster larvae, particularly if the level of DHA can be further enhanced.  相似文献   

辣椒新雄性不育系P-MS的选育     

S·矢泽  H·米田  M·细川 《辣椒杂志》2003,1(1):51-52

辣椒杂种一代的制种迄今几乎全靠人工授粉进行，需要花费大量的人工或劳动力。利用雄性不育繁制杂交种子已在不少农作物和园艺作物上得到利用，至于辣椒雄性不育的研究于1958年曾有过报道(Peterson，1958)。辣椒细胞质雄性不育由与S细胞质互作的隐性基因rf控制，但雄性不育的表达对温度敏感，在冷凉条件下会产生可育花粉(Peterson，1958；Shifriss ＆ Guri 1979；Shifriss，1997)。  相似文献   

Dissociation and phosphorylation constants for the inhibition of acetylcholinesterase by a series of novel O-ethyl O-phenyl S-n-propyl phosphorothioates     

Geoffrey J. Hart  Richard D. O&#x;Brien 《Pesticide biochemistry and physiology》1976,6(1):85-90

The phosphorylation, dissociation, and bimolecular reaction constants were determined for several members of a series of substituted O-ethyl O-phenyl S-n-propyl phosphorothioates in the presence of substrate. The data obtained are discussed in relation to electronegativity of substituents and in vivo toxicity.  相似文献   

Bioavailability and tolerability of nebulised dexamethasone sodium phosphate in adult horses          下载免费PDF全文

A. D. Haspel  S. Giguère  K. A. Hart  L. J. Berghaus  J. L. Davis 《Equine veterinary journal》2018,50(1):85-90

  相似文献   

Pharmacokinetics of the anticonvulsant levetiracetam in neonatal foals          下载免费PDF全文

K. D. MacDonald  K. A. Hart  J. L. Davis  L. J. Berghaus  S. Giguère 《Equine veterinary journal》2018,50(4):532-536

  相似文献   

察布查尔草原土壤酶活性垂直分布及土壤理化性质相关性研究     

赛牙热木·哈力甫  艾克拜尔·伊拉洪  宋瑞清  可不都赛买提·乃合买提  米日尼沙·买买提明  迪里努尔·艾力 《草业学报》2018,27(3):116-125

土壤酶(soil enzyme)作为土壤生态系统的组分之一,是生态系统的生物催化剂,在土壤物质循环和能量转化过程中起着重要作用。以新疆伊犁察布查尔县1191~2656 m海拔草原黑钙土为研究对象,选择土壤酶进行研究,以期解释土壤酶垂直分布特征及土壤肥力对土壤酶活性的影响。研究不同海拔及土层土壤酶活性变异特征,结果表明,过氧化氢酶活性0.237~0.722 mg·(g·20 min)^-1,碱性磷酸酶活性0.767~2.673 mg·(g·24 h)^-1,脲酶活性0.029~0.106 mg·(g·24 h)^-1,蔗糖酶活性3.384~23.801 mg·(g·24 h)^-1。土壤表层酶活性均大于中、底层,且酶活性随海拔的增加而上升,各土层、海拔间差异显著(P<0.05);通过相关性分析得知0~20 cm土层,海拔与脲酶活性呈极显著正相关(P<0.05,r=0.854^**),与蔗糖酶活性呈显著正相关(P<0.05,r=0.724^*);20~40 cm土层,海拔与碱性磷酸酶呈显著正相关(P<0.05,r=0.766^*);在40~60 cm土层,海拔与脲酶活性呈显著正相关(P<0.05,r=0.796^*)。在研究中还发现随土层的增加土壤酶活性与土壤肥力相关性降低。  相似文献   

拔节期氮肥运筹对不同滴灌量下冬小麦光合特性及产量的影响     

张永强  张璐  陈传信  赛力汗·赛  薛丽华  陈兴武  雷钧杰 《中国农学通报》2020,36(16):1-6

为探明拔节期氮肥运筹对不同滴灌量下冬小麦光合特性及产量的影响,在大田滴灌技术条件下,以‘新冬41号’为试验材料,研究4种拔节期氮肥运筹处理[N0(0 kg/hm²)、N1(90 kg/hm²)、N2(180 kg/hm²)、N3(270 kg/hm²)]对3种不同滴灌量[W1(1500 m³/hm²)、W2(3000 m³/hm²)、W3(3450 m³/hm²)]下冬小麦叶绿素含量（SPAD值）、叶面积指数(LAI)、叶片光合特性及产量的影响。结果表明,在3种滴灌量下各氮肥处理冬小麦拔节至乳熟期叶片SPAD值均呈“先增后降”的变化规律,最大值均在灌浆期;LAI呈现“先增后降”的变化规律,在孕穗期达最大。在同一施氮水平下,滴灌量增加,叶片的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)均增加,而胞间CO₂浓度(Ci)则降低。滴灌量较低时（W1处理）,增加拔节期施氮量能有效提高滴灌冬小麦的有效穗数、穗粒数、千粒重、产量和收获系数;水分充足时（W2、W3处理）,增加拔节期施氮量反而不利于产量的提高。综合考虑各项产量指标及氮肥利用效率得出,在滴灌量3000 m³/hm²条件下,拔节期施氮量180 kg/hm²时,滴灌冬小麦籽粒产量较高,氮肥利用率最大,可供生产参考。  相似文献   

肉鸭价格波动的影响因素研究     

闫建伟  王雅鹏  麦尔旦·吐尔孙 《中国家禽》2015,37(1)

基于协整检验、格兰杰检验、VAR建模及脉冲响应、方差分解的分析,研究对1991~2013年度中国肉鸭价格变动的影响因素及其之间的关系进行了实证分析。结果表明:我国肉鸭市场价格的剧烈波动受肉鸭产肉量、肉鸭出栏量、国内生产总值、猪肉价格、鸡肉价格、玉米价格、市场利率等因素的影响,且影响的程度与方向不尽相同。据此,提出政府应加强产业环境的优化及对玉米、猪肉、鸡肉行业的市场监控,合理规划肉鸭产业布局,协调产业均衡发展,做好肉鸭产业预测与指导工作,及时发布产业市场信息等建议。  相似文献