After researchers fed local dairy cows with imported grass , the dioxin levels in the milk from these cows gradually dropped from 2 . 98 picograms of the toxicity equivalent per gram of fat - - denoted as 2 . 98 pg teq / g fat - - to 1 . 75 pg teq / g fat 在研究员改用进口牧草喂食本地乳牛之后，牛乳中的戴奥辛含量，可从2 . 98皮克克脂肪逐渐降至1 . 75皮克克脂肪。
In this paper , we first analyze the input and output as well as cost - benefit rate of chinese livestock industry by the example of hog , beef , mutton and dairy cow . then , we choose the samples from different regions in different time , use the stochastic production frontier suggested by battese and coelli ( 1992 ) , which is aimed at the panel data ( balanced or unbalanced ) , and make the econometric analysis for the growth of hog , beef , mutton , and dairy cow . different from the former research for livestock industry , the efficiency measurement theory is introdiced into the growth model and the tfp is dissolved into technical advancement , technological efficiency and residual , the translog production function is used to make the estimation more precised 本文首先以生猪，肉牛、肉羊和奶牛为例对近年来我国畜牧业的投入产出和成本收益状况进行了分析，然后采用battese和coelli在1992年提出的针对混合数据( paneldata )的随机边界生产函数形式，在不同地区选取一定的样本，利用样本省的时间序列与截面混合数据，对生猪，肉牛，肉羊和奶牛的增长因素进行了分析，与以往对于畜牧业增长研究不同的是，将效率测算理论引入生产增长模型，把全要素生产率分解为技术进步、技术效率和残差项，并采取了更加符合实际的超越对数函数形式，使传统上使用的索洛余值法得到改进，更深层次的剖析了我国畜牧业目前的增长方式。
Pat oliphant ' s cartoon melds two current concerns prominent in us newspapers . at one level it plays wittily on the theme of bovine spongiform encephalopathy , the dreaded " mad cow disease " recently detected in the carcass of a slaughtered dairy cow from washington state unless , as is now suspected , it actually originated in alberta 一方面，漫画巧妙地提到了最近从华盛顿州宰杀的牛体中检测出来的牛脑海绵体病，也就是可怕的疯牛病除非该病真是如所怀疑的那样起源于加拿大的阿尔伯塔否则就是源于华盛顿州了。
Jointly produced by the canadian embassy in beijing , the alberta china office , manitoba provincial government , and sasktrade , this booklet contains 10 articles by forage experts from alberta , canada , covering such topics as forage certification and inspection , forage establishment , forage harvesting and storage , feeding alfalfa to dairy cows , and the value of alfalfa in supplementing low quality forages 包含了加拿大阿尔伯塔省专家撰写的共10篇文章,分别是:加拿大牧草业,牧草认证分级和检验,牧草保持水土,牧草品种,牧草种植,牧草的收获和收藏,牧草施肥,苜蓿灌溉,用苜蓿草饲喂奶牛,苜蓿作为低质量牧草添加料的价值
A provincial high - tech enterprises , are now pending state - level hi - tech enterprises , the company has jurisdiction over a research and development base , a modern dairy cow base three production plants on 24 branches , 1 , 070 staff , of whom 48 % or higher qualifications . with many domestic and 20 national research institutions and establishment of a research grafting and collaboration 属省级高新技术企业，现正待批国家级高新技术企业，公司下辖一个科研开发基地，一个现代化奶牛基地，三个生产厂等24个分公司，有员工1070人，其中大专以上学历的占48 % ，并与国内20多家大专院校及国家研究院所建立了科研成果嫁接和协作关系。
The common grounds among these three forms are that the level of farmer ' s systematization , contribution of scientific technology to dairy industry , dairy cow management , milk quality can be improved . this article also suggest that different unit should play different roles during the period of building the organization system of milk resource base 本文的创新点是：在呼市地区实行股份合作制，让养奶牛的农产到伊利、蒙牛集团入股，成为伊利、蒙牛集团的股东，使农户与企业形成利益共享、风险共担的共同体。
To clarify epidemiologic characteristic of abomasum diseases in dairy cow of daqing regions , 14210 dairy cows from zhaoyuan county , lindian county , dumeng county and honggang district of daqing were investigated to identify status of abomasitis , abomasum impaction , abomasum ulcer and abomasum displacement 摘要为了阐明奶牛真胃疾病在大庆周边地区的流行病学特点，对肇源县、林甸县、杜蒙县、大庆红岗区等地的14210头奶牛的四种真胃疾病（真可炎、真胃阻塞、真胃溃疡和真胃变位）进行了调查。
