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60篇 您的检索式:作者名="Strath"
    题名 作者 年代 出处 被引量
1高产奶量的母猪有更高的采食量和体动员显示文摘选择能哺育更大窝产仔数的超高产母猪以提高产仔数,但是综合考虑这些现代母猪产奶量、采食量和体动员相互之间联系的研究还很有限。试验旨在研究什么样的母猪产奶量高、窝产仔数多,不同胎次有何影响,以及哺乳期生产性能对下一胎繁殖性能有何影响。选择565头1~4胎母猪,试验期从产前7 d至断奶。产后第2天每窝仔猪统一调整为14头。产前7 d、产后第2天和断奶时测定母猪体重和背膘厚度。产后第2天和断奶时称取仔猪窝重。计算变量之间的皮尔森相关系数,建立回归模型。母猪的平均日采食量(6.1±1.1)kg,仔猪每天窝增重(2.92±0.53)kg,每头母猪的平均断奶仔猪数(13.0±1.1)头。总的来讲,与2~4胎母猪相比,1胎母猪平均日采食量和产奶量更低,下一胎总产仔数也下降,这可能是因为初产母猪相比经产母猪会动用更多体储。仔猪每窝平均日增重与母猪的采食量、窝产仔数和体重损失呈正相关。1~4胎母猪整个哺乳期日采食量每提高1 kg,仔猪窝日增重提高220~440 g,母猪哺乳期体重下降6.6~13.9 kg。但是每天平均产奶量提高1 kg,第4胎母猪哺乳期体重损失减少4.3~21.0 kg。下一胎总产仔数与上一胎产仔数呈正相关。总之,高采食量和高体动员是高产奶量的先决条件。母猪可能已经非常接近他们身体饲料摄取的生理极限,因此,未来的研究应着眼于优化哺乳期超高产母猪的饲粮能量和营养浓度以及初产母猪和经产母猪之间的区别。Strathe A V Bruun T S Hansen C F 李元凤 2017养猪2017,,4:8
2Increasing dailywalking improves glucose tolerance in overweight women显示文摘Swartz AM Strath SJ Bassett DR 2003Prev Med2003,37,4:1
3Estimating type and energy cost of physical activity using multiple accelerometers and machine learning techniques 显示文摘Strath SJ Kate RJ Keenan KG 2012Medicine & Science in Sports & Exercise2012,44,5:1
4Selective removal of heavy metal ions from aqueous solutions by ultrafiltration of macromolecular complexes显示文摘Strath mann H 1980Separation Science and Technology1980,15,4:1
5Estimation of energy expenditure using CSA accelerometers at hip and wrist sites显示文摘Swartz A M Strath S J Bassett Jr D R 2000Medicine and science in sports and exercise2000,,9:1
6A new mathematical model for combining growth and energy intake in animals:the case of the growing pig 显示文摘Strathe AB Sorensen H Danfaer A 2009J Theor Biol2009,261,2:1
7Evaluation of Heart Rate as a Method for Assessing Moderate Intensity Physical Activity显示文摘STRATH S J SWARTZ A M BASSETT D R 2000Med Sci Sports Exe2000,32,9:1
8Physical activity measurement in older adults: relationships with mental health显示文摘Parker SJ Strath SJ Swartz AM 2008J Aging Phys Act2008,16,:1
9Eosionphilia in transgenic mice expressing interleukin 5显示文摘Dent LA Strath M Mellor AL 1990J Exp Med1990,172,5:1
10IgG and complement receptors on purified mouse Eosinophils and neutrophils显示文摘Lopez A F Strath M Sanderson C J 1981Immunology1981,43,4:1
11Guide to the assessment of physical activity:clinical and research applica- tions:a scientific statement from the American heart associa- tion 显示文摘Strath S J Kaminsky L A Ainsworth B E 2013Circulation2013,128,20:1
12Prediction of enteric methane emissions from cattle显示文摘Luis E. Moraes Anders B. Strathe James G. Fadel David P. Casper Ermias Kebreab 2014Glob Change Biol2014,,7:1
13Estimation of energy expenditure using CSA accelerometers at hip and wrist sites 显示文摘Swartz AM Strath SJ Bassett DR Jr 2000Med Sci Sport Exere2000,32,9:1
14Integration of Physiological and Accelerometer Data to Improve Physical Activity Assessment显示文摘STRATH S J BRAGE S EKELUND U 2005Med Sci Sport Exe2005,37,11:1
15Estimation of energy expen- diture using CSA accelerometers at hip and wrist sites 显示文摘Swartz AM Strath SJ Bassett DR 2000Med Sci Sport Exere2000,32,9:1
16Evaluation of heart rate as a method for assessing moderate intensity physical activity显示文摘Strath S J Swartz AM Bassett Jr DR O'Brien WL King GA Ainsworth BE 2000Med- icine and science in sports and exercise2000,32,32:1
17Validity of the Simultaneous Heart Rate motion Sensors Technique for Measuring Energy Expenditure显示文摘STRATH S J BASSETT D R DIXIEL J R 2002Med Sci Sports Exe2002,34,5:1
18IgG and complement receptors on purified mouse eosinophils and neutrophils 显示文摘Lopez AF Strath M Sanderson CJ 1981Immunology1981,43,4:1
19Genetic parameters for different measures of feed efficiency and related traits in boars of three pig breeds 显示文摘DO D N STRATHE A B JENSEN J 2013Journal of Animal Science2013,91,9:1
20Accelerometer Use with Children, Older Adults, and Adults with Functional Limitations 显示文摘SCOTT J STRATH KARIN A PFEIFFER MELI- CIA C WHITY-GLOVER 2012American College of Sports Medi- cine2012,44,12:1
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