搜索结果: 1-11 共查到“工学 Cattle”相关记录11条 . 查询时间(0.093 秒)
Fallowing cattle-feed farmland simplest way to alleviate western water shortages（图）
Fallowing cattle-feed farmland simplest western water shortages
2020/3/6
The rate at which humans consume fresh water is now approaching or surpassing the rate at which water sources are naturally replenished, creating shortages for people and ecosystems.In the western U.S...
The Impact of Cattle Grazing in High Elevation Sierra Nevada Mountain Meadows over Widely Variable Annual Climatic Conditions
Water Quality Sierra Nevada, Mountain Meadows Livestock Grazing Cattle, Indicator Bacteria
2013/3/11
The impact of summer cattle grazing on water quality during three very different climatic years in the Sierra Nevada was investigated. Water year 2009 had near normal precipitation; 2010 had late prec...
精量饲喂系统的核心技术是奶牛个体识别技术。系统采用了非接触式的无线射频识别（RFID）技术，奶牛佩带符合ISO11785标准的电子标签。采食开始前，系统核对奶牛信息后按照饲喂要求进行自动投料。系统各测量数据将通过以ZigBee为核心建立起来的无线网络传输到主控计算机，同时主控计算机将奶牛饲喂规则的相关控制指令也通过无线网络传送到饲喂装置，控制饲喂装置工作。系统预留相关扩展接口方便后续升级使用。
The Solubilization of Unheated Cattle Achilles Tendon with Actinidin under Neutral and Acidic Conditions
unheated cattle achilles tendon actinidin solubilization
2009/5/31
The solubilization of cattle achilles tendon with actinidin was investigated under neutral and acidic conditions. 1.43 to 1.92 and 0.97 to 3.19% of collagen were solubilized by treating the cattle ach...
Lactoprotein Genetic Variants in Cattle and Cheese Making Ability
bovine lactoproteins genetic variants milk composition
2009/3/23
Cheese making ability of milk is associated with high contents of protein, casein (CN) and fat, high casein number, short rennet coagulation time (RCT), high curd firmness (CF) and with a high cheese ...
Do indigenous Southern African cattle breeds have the right genetics for commercial production of quality meat?
Indigenous beef breeds Tenderness Yield Growth performance Pasture Feedlot
2012/8/13
The establishment of cattle breeds which are now indigenous to Africa is believed by historians to be very closely associated with man, his development, migration and specific behaviour from 6000 year...
Short- and Long-Term Production Losses and Repeatability of Clinical Mastitis in Dairy Cattle
clinical mastitis production repeatability
2008/8/6
Between 1985 and 1990, a study of 5313 lactations of 2477 Black and White cows was carried out. A stepwise least squares method was used to obtain unbiased estimates of milk, fat, and protein losses t...
Strategies for Preventing Milk Fever in Dairy Cattle
milk fever hypocalcemia potassium cation-anion difference
2008/7/30
Milk fever is a complex metabolic disorder that occurs at the onset of lactation. Clinical symptoms of this disease include inappetence, tetany, inhibition of urination and defecation, lateral recumbe...
Time of Ovulation Relative to Mounting Activity in Dairy Cattle
artificial insemination estrous behavior ovulation radiotelemetry
2008/7/3
Time of ovulation was determined for Holstein cows (n = 51) for estruses occurring spontaneously (n = 33) or those induced by PGF2 (n = 86). Ultrasound examination of ovaries was conducted 42 to 49 d ...
Pre-harvest interventions to reduce carriage of E. coli O157 by harvest-ready feedlot cattle
Food safety E. coli O157 Interventions Feedlot Cattle
2012/8/10
Escherichia coli O157 is an important cause of food-borne illness. The primary reservoir for this organism is cattle and at present the major site of control is within abattoirs. Recent data have high...
Economic evaluation of cattle management in the system of organic farming
organic agriculture economical evaluation of cattle management development of organic agriculture support of organic agriculture
2014/3/29
This paper introduces partial results of the research project QC 1140 aimed at the efficiency of enterprises operating in the system of organic farming, especially considering the use of grassland lin...