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601篇 您的检索式:作者名="Hansen V"
    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
2Improvement in Mental Health over Time in Northern Norway: A Prospective Study of a General Population Followed for 9 Years, with Special Emphasis on the Influence of Darkness in Winter显示文摘Nilsen LS Hansen V Olstad R 2004Social Psychiatry and Psychiatric Epidemiology2004,,4:1
3Investigation of precipitation in an Al-Zn-Mg alloy after twostep ageing treatment at 100 ℃ and 150 ℃显示文摘 Warren P J Hansen V 1999Material Science and Engineering A1999,270,:1
4Investigation of precipitation in an Al-Zn-Mg alloy after two-step aging treatment at 100℃ and 150 ℃显示文摘Stiller K Warren P J Hansen V 1999Mater Sci Eng A1999,270,:1
5Enforced mobilization,early oral feeding, and balanced analgesia improve convalescence after colorectal surgery 显示文摘Henriksen M G Jensen M B Hansen H V 2002Nutrition2002,18,2:1
6Early on-treatment prediction of response to peginterferon alfa-2a for HBeAg-negative chronic hepatitisB using HBsAg and HBV DNA levels 显示文摘Rijckborst V Hansen BE Cakaloglu Y Ferenci P Tabak F Akdogan M Simon K Akarca US Flisiak R Verhey E Van Vuuren AJ Boucher CA ter Borg MJ Janssen HL 2010Hepatology2010,52,2:1
7Investigation of precipitation in an AI-Zn-Mg alloy aftcr two-step ageing treatment at 100 C and 150 C 显示文摘STILLER K WARREN P HANSEN V ANGENETE J GJNNES J 1999Mater Sci Eng A1999,270,1:1
8Study and structure modeling of the η′phase,the hardening precipitates in commercial Al-Zn-Mg alloys显示文摘Li X Z Hansen V Gjonnes J 1999Acta Mater1999,47,:1
9Prediction of sustained response to peginterferon alfa-2b for hepatitis B e antigen-positive chronic hepatitis B using on-treatment hepatitis B surface antigen decline 显示文摘Sonneveld MJ Rijckborst V Boucher CA Hansen BE Janssen HL 2010Hepatology2010,52,4:1
10Effects of telazol and nembutal on retinal responses 显示文摘Chaudhary V Hansen R Lindgren H etal 2003Doc Ophthalmol2003,107,1:1
11Detection of cesarean scars by transvaginal ultrasound 显示文摘Armstrong V Hansen W F Van Voorhis B J 2003Obstet Gyneeol2003,101,1:1
12C-Labeling and preliminare evaluation of vortioxetine as a PET radioligand 显示文摘Andersen V L Hansen H D Herth M M 2014Bioorg Med Chem Lett2014,24,1:1
13Global change in forests:response of species,communities,and biomes显示文摘HANSEN A J NEILSON R P DALE V H 2001Bioscionce2001,51,9:1
14Real-lime illustration of vascular structures 显示文摘Ritter F Hansen C Dicken V 2006IEEE Transactions on Visualization and Computer Graphics2006,12,5:1
15Performance comparison of dynamic Web platforms 显示文摘APTEA V HANSEN T REESER P 2003Computer Communications2003,26,8:1
16GP-zones in Al-Zn-Mg alloys and their role in artificial aging显示文摘Berg L K Gjonnes J Hansen V 2001Acta Materialia2001,49,:1
17GP-Zones in Al-Zn-Mg alloys and their role in artificial aging显示文摘Berg L K Jonnes J G Hansen V 2001Acta Mater2001,49,:1
18Efficacy of translum in alan-gioplasty for the management of symptomatic cerebral vasospasm following a neurysmal subarachnoid hemorrhage显示文摘Polin R S Coenen V A Hansen C A etal 2000J Neurosurg2000,92,2:1
19High diversity and abundance of putative polyphosphate-aeeumulating Testrasphaera-related bacteria in activated sludge sys- tems显示文摘Nguyen H T Le V Q Hansen A A 2011FEMS Mierobiol Eeol2011,76,2:1
20Genesis and effects of lon8waves in the equatorial Pacific显示文摘HANSEN D V PAUL C A 1984JGeophys Res1984,89,10:1
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