期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
奶牛饲喂效率的计算和应用
1
作者 王书祥 曹志军 +1 位作者 李胜利 王雅晶 《中国乳业》 2015年第10期52-54,共3页
2014年我国生鲜乳价格持续降低,在确保奶牛产奶量稳定和个体健康的前提下,提高饲喂效率成为奶牛场维持利润的一个重要方法。通过提高饲喂效率,可以增加单位重量干物质所转化的牛奶,减少粪污的排放量,增加奶牛场的盈利能力,缓解奶牛场的... 2014年我国生鲜乳价格持续降低,在确保奶牛产奶量稳定和个体健康的前提下,提高饲喂效率成为奶牛场维持利润的一个重要方法。通过提高饲喂效率,可以增加单位重量干物质所转化的牛奶,减少粪污的排放量,增加奶牛场的盈利能力,缓解奶牛场的环保压力。因此掌握饲喂效率计算和测量方法,了解影响饲喂效率的主要因素对奶牛场提高饲喂效率有重要意义。 展开更多
关键词 奶牛 饲喂效率 干物质采食量 养收入 粪便排泄
下载PDF
典型奶牛场饲喂效率及用地的对比研究
2
作者 史枢卿 《中国乳业》 2011年第4期10-12,共3页
牛场运营成本中饲料成本是最大的一项,一般占牛奶生产总成本的50%以上,因此对饲料饲喂效率的研究很有意义,对指导奶业生产有很大作用。本文基于IFCN的数据,对比了中国、德国、新西兰、美国和以色列等国典型牛场的饲喂效率。在对比世界... 牛场运营成本中饲料成本是最大的一项,一般占牛奶生产总成本的50%以上,因此对饲料饲喂效率的研究很有意义,对指导奶业生产有很大作用。本文基于IFCN的数据,对比了中国、德国、新西兰、美国和以色列等国典型牛场的饲喂效率。在对比世界各国奶牛场占地面积和牛场用地之后,根据中国牛场牛均土地面积少的现状,提出了用全球资源发展我国奶业的思路。 展开更多
关键词 奶牛 饲喂效率 料配方 对比
下载PDF
提高鱼饲料效率的技术要点
3
作者 卢志 《河南科技(乡村版)》 2004年第10期22-22,共1页
优质高效饲料对原料选购、配方设计、生产工艺等都有很高的要求,优质高效的饲料可以提高其利用率,降低饲料系数,能显著降低生产成本。
关键词 饲喂效率 原料选购 配方设计 生产工艺
下载PDF
Breeding and mass scale rearing of clownfish Amphiprion percula: feeding and rearing in brackishwater 被引量:1
4
作者 DHANEESH Kottila Veettil AJITH KUMAR Thipramalai Thankappan +1 位作者 SWAGAT Ghosh BALASUBRAMANIAN Thangavel 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第4期528-534,共7页
Breeding and mass scale larval rearing of clownfish Amphiprion percula is very limited in brackishwater. We designed an indoor program of A. percula culture in brackishwater with a salinity of 24±1, during which ... Breeding and mass scale larval rearing of clownfish Amphiprion percula is very limited in brackishwater. We designed an indoor program of A. percula culture in brackishwater with a salinity of 24±1, during which the impacts of feed type, water temperature, and light intensity, on the efficiency of its reproduction, were revealed. The fish were accommodated along with sea anemones in fibre glass tanks to determine the influence of brooder diet on breeding efficiency. Higher reproductive efficiency [number of eggs laid (276±22.3 eggs)] was observed when fish were fed live Acetes sp. rather than clam (204±16.4 eggs), trash fish (155±12 eggs) and formulated feed (110±10 eggs). The spawning rate was increased during September and October (water temperature, 28.74±0.55℃) on average of 2.4 spawning per month; and low spawning rate was in January (water temperature, 24.55±0.45℃) on average of I spawning per month. Among three light intensities (100, 500, and 900 1x) set to evaluate larval survival rate, larvae showed the highest survival rate (65.5%) at 900 lx. The breeding method specifically in brackishwater developed in the present study is a new approach, will help the people from the regions of estuary and backwater to enhance their livelihood and it will lead to reduce the exploitation from the wild habitat. 展开更多
关键词 Amphiprion percula brackishwater FEED larval rearing light intensity
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部