A52-75-2007E.pdf - AgroMedia International Inc

ResearchSummaryIndexAnimal Welfare1 Stocking density and feed barrier design affect the feeding and social behavior of dairy cattle.................................. 212 Effect of hoof pathologies on subjective assessment of dairy cow gait.................................................................................. 213 Stall dimensions and the prevalence of lameness, injury, and cleanliness on 317 tie-stalldairy farms in Ontario.................................................................................................................................................................. 224 Effects of mixing on drinking and competitive behavior of dairy calves................................................................................ 225 Plasma melatonin and insulin-like growth factor-1 responses to dim light at night in dairy heifers............................ 236 Flooring in front of the feed bunk affects feeding behavior and use of freestalls by dairy cows................................... 237 Effects of milking on dairy cow gait...................................................................................................................................................... 248 Effects of continuous versus periodic milk availability on behavior and performance of dairy calves........................ 249 Hoof discomfort changes how dairy cattle distribute their body weight............................................................................... 2510 Brisket boards reduce free stall use....................................................................................................................................................... 2511 Effects of roughness and compressibility of flooring on cow locomotion............................................................................. 2612 Feed stalls affect the social and feeding behavior of lactating dairy cows............................................................................. 26Environment1 An approach for measuring methane emissions from whole farms......................................................................................... 292 Measuring greenhouse gas emissions from point sources in agriculture............................................................................... 293 A proposed approach to estimate and reduce net greenhouse gas emissions from whole farms............................... 304 Methane and nitrous oxide emissions from Canadian animal agriculture: A review.......................................................... 31Feeding1 Effects of alfalfa particle size and specific gravity on physical characteristics of alfalfa, rationand performance of Holstein dairy cows.............................................................................................................................. 352 Phosphorus status of lactating dairy cows fed total mixed rations containing0.24% vs. 0.36% phosphorus..................................................................................................................................................... 353 Milk production and milk composition of dairy cows fed Lac100 or whole flaxseed......................................................... 364 Ensiling characteristics, nutrient composition, and in situ ruminal and whole tract degradabilityof brown midrib and leafy corn silage................................................................................................................................... 365 Frequency of feed delivery affects the behavior of lactating dairy cows................................................................................ 376 Protein secondary structures (α-helix and β-sheet) at a cellular level and protein fractions in relationto rumen degradation behaviours of protein: A new approach.................................................................................. 377 Folic acid and vitamin B12 requirements of dairy cows: A concept to be revisited............................................................. 388 Modeling nutrient supply to dairy cattle from a feedstuff using NRC-2001 (a TDN-based model)with inputs based on in situ and mobile bag technique measurements................................................................. 389 Dietary forage and nonfiber carbohydrate contents influence b-vitamin intake, duodenal flow,and apparent ruminal synthesis in lactating dairy cows................................................................................................. 3910 Effects of physically effective fiber on chewing activity and ruminal pH of dairy cows fed dietsbased on barley silage................................................................................................................................................................. 39Research Summary Index 13