Effects of disbudding on behavior and heart rate during jugular venipuncture in dairy calves [0.03%]
去角对乳牛犊颈静脉采血时的行为和心率的影响
Alycia M Drwencke,Haley Garcia,Sarah J J Adcock et al.
Alycia M Drwencke et al.
Disbudding is a common painful procedure that alters physiological and behavioral responses in calves. Other routine management procedures are commonly performed on calves while these disbudding wounds are healing, such as vaccine injection...
A preliminary study on the effects of red Bonnemaisonia hamifera seaweed on methane emissions from dairy cows [0.03%]
红 бон内莫索尼奥nia hamifera海藻对奶牛甲烷排放的影响的初步研究
M Thorsteinsson,A A Schönherz,S J Noel et al.
M Thorsteinsson et al.
The red seaweed Bonnemaisonia hamifera has shown potential as a CH4-mitigating feed additive in vitro, and hence, this pilot study aimed to investigate the potential of the seaweed when fed to dairy cows. The study was conducted as a 4 × 4...
Editorial: Values shared by journals of learned societies, associations, and scientific institutions in animal science [0.03%]
动物科学学会、协会和学术机构期刊共有的价值观编者按
I Ortigues-Marty,I Louveau,G Bee et al.
I Ortigues-Marty et al.
Long-term effects of abomasal infusion of linoleic and linolenic acids on the enrichment of n-6 and n-3 fatty acids into milk fat of lactating cows [0.03%]
瘤胃内含注入亚油酸和α-亚麻酸对泌乳奶牛乳脂中n-6和n-3脂肪酸长期增益的影响研究
J M Dos Santos Neto,L C Worden,J P Boerman et al.
J M Dos Santos Neto et al.
Our objective was to compare abomasal infusions of linoleic (18:2n-6) and α-linolenic (18:3n-3) acid on the incorporation of n-6 and n-3 fatty acids (FA) into the milk fat of dairy cows and to evaluate their potential carryover effects. Si...
In-line milk progesterone monitoring as a tool for precision reproductive management [0.03%]
乳酮体监测技术在精准牛群繁殖管理中的应用
Tony C Bruinjé,Divakar J Ambrose,Stephen J LeBlanc
Tony C Bruinjé
In-line milk progesterone (IMP4) monitoring (Herd Navigator, DeLaval) is a technology that automatically detects onset of cyclicity, estrus, and pregnancy. Sampling starts at 20 DIM and occurs on average every 2 d until pregnancy. Estrus is...
Investigating rumination and eating time as proxies for identifying dairy cows with low methane-emitting potential [0.03%]
调查沉思和进食时间作为识别低甲烷排放潜力乳牛的替代方法
A Castaneda,N Indugu,K Lenker et al.
A Castaneda et al.
Identifying cows with low CH4-emitting potential can greatly contribute to CH4 abatement in dairy herds. However, this process has been cumbersome and labor-intensive. Ear tags and collar-based accelerometers measure rumination and chewing ...
Variance reduction and measurement errors in estimating lactation milk yields using best prediction: An analytical review [0.03%]
最佳预测估计泌乳量时的方差减少与测量误差——一个分析性回顾
Xiao-Lin Wu,Paul M VanRaden,John Cole et al.
Xiao-Lin Wu et al.
Best prediction (BP) has been used in the United States to estimate unobserved daily and lactation yields from known test-day yields since 1999. This method has proven more accurate than its predecessors. However, it has 2 remarkable challe...
Evaluating cow identification reliability of a camera-based locomotion and body condition scoring system in dairy cows [0.03%]
评估基于摄像头的奶牛行走和体况评分系统的奶牛识别可靠性
D Swartz,E Shepley,G Cramer
D Swartz
Dairy farms are growing in size, while the total number of farms is decreasing. As herd sizes grow, technology is increasingly adopted for monitoring and managing cows. However, for technology to replace subjective and labor-intensive tasks...
Associations between body temperature and feed efficiency traits in lactating Holstein cows [0.03%]
体核温度与乳牛泌乳期 Feed Efficiency 性能之关联性研究
Ligia Cavani,Larissa C Novo,Faith S Reyes et al.
Ligia Cavani et al.
Differences in feed efficiency among dairy cows could be partially explained by changes in body temperature due to the heat increment. This heat represents chemical energy lost, and theoretically, it should be lower in more efficient cows. ...
Testing preference of alfalfa hay of different relative feed value and brome hay in lactating Jersey cows [0.03%]
泌乳 jersey 奶牛对不同相对饲喂价值的紫花苜蓿和狐茅干草的选择性试验
K K Buse,P J Kononoff
K K Buse
Forages comprise a large portion of dairy cattle rations, and quality can have a large influence on feed intake and milk production. Although factors like particle size, fiber content, and digestibility affect it, palatability can also play...