提高圈养母狗受胎率方法

１准确诊断母狗的发情狗是季节性发情动物,性成熟后的母狗每年正常发情２次,一般是在每年春季（３～４月）和秋季（９～１０月）各发情１次。母狗的每一发情周期可区分为四个时期,即发情前期（７～１０ｄ）、发情期（４～１２ｄ）、发情后期（约２个月）和休情期（约３...     

如何确定母犬的最佳配种期

犬是季节性发情动物。每年发情2次,即每年的春季(3～5月)和秋季(9～11月)各发情1次。年产2胎。因此掌握好母犬的最佳配种期,对养殖户具有实际意义。方法如下: (一)滴血确定法 在母犬发情期间,母犬阴户能分泌出血液,从见到发情母犬阴户第1次滴血算起,初产母犬一般在其后的第11~13天首次配种较为合适。经产母犬在其后的第9～     

提高圈养母狗受胎率方法

提高圈养母狗受胎率方法郑四清１．准俩诊断母狗的发情。狗是季节性发情动物，性成熟后的母狗每年正常发情２次，一般是在每年春季（３～４月）和秋季（９～１０月）各发情１次。母狗的每一发情周期可区分为四个时期，即发情前期（７～１０天）、发情期（４－１２天）、发...     

选择远征药业、享受高新科技远征药业药物预混剂系列产品之一

犬是季节性发情动物。每年发情2次，即每年的春季(3—5月)和秋季(9-11月)各发情1次。年产2胎。因此掌握好母犬的最佳配种期，对养殖户具有实际意义。     

母犬的发情、乏情原因及其诱导发情

1母犬的发情1.1发情与发情时间不同品种、不同地理位置和环境,犬的发情时间会有所不同。正常犬每年发情2次,大多数母犬在春季3～5月份发情1次,至秋季的9～11月份可再次发情。如果在一个繁殖季节里未能受孕,需待下一次发情后才能交配。因此必须掌握好母犬发情的特征,进行及时、正确的配种。     

肉用犬配种时应注意的问题

发情是母犬生长发育到一定年龄时性活动表现的一种周期性变化。犬是一次性发情动物 ,即在一个繁殖季节里只出现一次发情。因此掌握科学的配种技术对肉犬养殖者至关重要。1　认真识别母犬的发情表现母犬在每年春季 (3～ 5月 )和秋季 (9～ 11月 )各发情一次 ,大约持续 6～ 14ｄ ,少数可达 2 1ｄ。主要表现为阴门肿胀、潮红 ,流出伴有血液的红色粘液 ,食欲减少 ,频频排尿 ,举尾拱背 ,喜欢接近公犬 ,常爬跨其它犬等。而公犬的发情无规律可循 ,当嗅到发情母犬特殊气味 ,即引起兴奋 ,完成交配。2　选择优良种犬要选择无退化现象 ,神经类型稳定 ,体…     

提高圈养母狗受胎率方法

提高圈养母狗受胎率方法＠于丽平提高圈养母狗受胎率方法于丽平辽宁省辽中县南门街６号１１０２００１准确诊断母狗的发情狗是季节性发情动物，性成熟后的母狗每年正常发情２次，一般是在每年春季（３～４月）和秋季（９～１０月）各发情１次。母狗的每一发情周期可分为四个时期...     

犬精液的研究利用

犬为季节性单次发情动物,1年只发情1次,发情期所持续时间为1周左右,但由于驯化时间较长,现在家犬每年发情2次。目前,在保存犬的遗传资源及保护犬生态多样性方面,犬精液的研究利用成果起着重要作用。现今,有关犬精液的研究利用主要有以下几个方面：     

提高母猪繁殖能力的措施

众所周知，猪是多胎动物。成年母猪每次发情排卵20枚左右，平均窝产仔12头左右，每年产仔2．2～2．5窝（20～30头）。而在实际生产中，年产窝次1～2．3窝，     

母犬的假孕

犬是季节性单次发情动物每年春秋各有一 或孕酮水平快速减少可引起动物对促乳素敏感 , ,次区分不是很明显的繁殖季节每一个繁殖季节 性的增加都有可能导致犬的假孕症状不明显的 , , 。仅出现一次发情根据母犬的发情征候和对公犬 假孕孕酮水平下降较缓慢而在有些甚至是大部 。 , 。的反应发情周期一般分为发情前期发情期发 分自发性地假孕犬中孕酮浓度发生急剧的下降 , 、 、 , 。情后期和乏情期如果怀孕黄体…     

中国饲料工业协会第五届理事会顾问、会长、常务副会长、副会长、秘书长、副秘书长、常务理事、理事名单

顾问刘中一张德邻宋瑞祥聂振邦张子仪戎易王维四会长白美清国务院原副秘书长、第四届理事会会长常务副会长(8人,以姓氏笔划为序)刘永好新希望集团董事长、第四届理事会副会长刘汉元通威股份有限公司董事长、第四届理事会副会长陈丹广东恒兴集团股份有限公司董事长、第四届理事会副会长张延喜农业部原副部长、第四届理事会副会长吴明夏湖南正虹科技发展股份有限公司董事长、第四届理事会副会长陶一山唐人神集团股份有限公司董事长、第四届理事会副会长温鹏程广东温氏食品集团有限公司董事长、第四届理事会副会长谭竹洲原化学工业部副部长、第…     

Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog

Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum.     

The influence of the width of the saddle tree on the forces and the pressure distribution under the saddle

As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks.     

浅谈对症用药

对症用药就是通过对患病信鸽的症状进行诊断,进而确定病属,选择药物及如何用药的方法。     

军犬鉴别中的嗅源培养和易出现的问题及对策

嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.……