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挪威奶牛酮病表现的身体状况Norway cows ketone expression of disease physical condition

论文作者:英语论文论文属性:职称论文 Scholarship Papers登出时间:2012-02-29编辑:lena ding点击率:8442

论文字数:955论文编号:org201202291035235828语种:英语 English地区:挪威价格:免费论文

关键词:health scoreMethadone diseaseRepeated measures analysis introduction

摘要:本实验研究372头兼用奶牛适度产生酮病与身体状况评分的联系,奶牛来源于挪威。之所以选择,是因为那里的农场的奶牛采用栓系谷仓并且高发奶牛酮病率。

Norway cows ketone expression of disease physical condition

[abstract] the experimental research 372 most moderate produce testosterone cow head of disease and physical condition rating of contact, cows from Norway. Was the choice of, because of the farm the barn and bolt the cow is high incidence cows ketone disease rate, and a researcher monthly to visit and inspect the farm and write down every cow health score, a month do it once, when young in production, the physical condition 3.5 or higher score for the cows to be quarantined, because ketone disease rate will continue to rise, in this disease before diagnosis, later found to have the disease than healthy testosterone cow cow body condition higher scores, and have the disease than later testosterone cow lost more health score points. In early summer and young cow hair the possibility of testosterone disease minimum. Postpartum period, the physical condition of the decline of the score cows to be quarantined, because the body condition rating will extend the decline in young interval, increase the number of procedures of artificial insemination. We draw a conclusion is: health score is monitoring nutrition management, reproduction, most cows moderate the relationship between testosterone disease produced a very effective method of science.
[key words] health score; Methadone disease; Repeated measures analysis
introduction
Physical condition rating method as a cow nutrition management of the effective evaluation methods have been widely, energy balance and ovarian back and forth between the number of days the opposite of activity relationship has been reported (Butler and Smith, 1989; DeVries et al., 1998; Senatore et al., 1996), energy balance with ketone bodies have close links (Andersson and Lundstro ¨ m, 1984). Most studies have shown in the body when the young condition, reproduction, ketone disease three interrelated system (Gearhart et al., 1990; Ruegg et al., 1992), other researchers have not verify Syria on the relationship between (Ruegg and Milton, 1995; Waltner et al. 1993). The results of the contradictions also reportedly, about lactation the status of the body loss, reproduction reproduce, ketone disease of the relationship between (Gearhart et al., 1990; Ruegg and Milton, 1995).
Recently, research shows that after lactation during the young in the high yield cow body and health score on fertility and health conditions change role (Heuer et al., 1999; Ruegg and Milton, 1995; Waltner et al., 1993), many studies have shown that young cow in during the proportion to less than 10% (Heuer et al., 1999; Markusfeld et al., 1997; Ruegg and Milton, 1995). Most cows produce ketone disease with moderate is in the present study, because a very high proportion in a young cow in during high health score. For Norway cow earlier studies have quite clearly reveals the breeding process in oil have fewer savings subcutaneous fat, this kind of idea by report is on Holstein cow (Gillund et al., 1999), these differences in the present study, was more frequent.
The purpose of the present study is, sure Norway cows physical condition and the relationship between testosterone score disease, physical condition of the relationship between the score and reproduction, in order to achieve this goal, after lactation process, production during the physical condition of the young score, postpartum stage health score down, monthly health score with ketone disease incidence, first 论文英语论文网提供整理,提供论文代写英语论文代写代写论文代写英语论文代写留学生论文代写英文论文留学生论文代写相关核心关键词搜索。

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