Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Dry period length of dairy cows : milk composition and quality
    Vries, Ruben de - \ 2017
    Wageningen University. Promotor(en): Toon van Hooijdonk; K. Holtenius, co-promotor(en): Kasper Hettinga; H.L.M. Lindmark-Månsson. - Wageningen : Wageningen University - ISBN 9789463430463 - 141
    dairy cows - dry period - milk composition - milk quality - milk - casein - micelles - melkkoeien - gustperiode - melksamenstelling - melkkwaliteit - melk - caseïne - micellen

    A dry period of dairy cows is historically seen as a period during which the cow can restore its body condition and regenerate its mammary epithelium in order to be high yielding in the successive lactation. Recent work has indicated that high yielding cows generally experience a severe negative energy balance in early lactation. Dry period reduction is a strategy to improve the energy balance of dairy cows in early lactation. This thesis aimed at evaluating the influence of dry period length on milk composition and milk quality. Milk composition parameters indicate the processing quality of milk for the dairy plant, and may also reflect the physiological condition and energy status of the cow.

    In this work, omission of the dry period was related to a reduced β-casein fraction in early lactation milk. Applying a short (4 weeks) instead of a conventional (8 weeks) dry period resulted in increased plasmin activity in milk, but did not affect the β-casein fraction. Increased plasmin activity in relation to a shortened dry period was particularly found in milk of cows of third or higher parity, that generally had relatively high somatic cell count. At low somatic cell counts, dry period reduction or omission only tended to result in an increased plasmin activity due a higher casein concentration in milk. From increased concentrations of a number of low abundant proteins in colostrum of cows with a short dry period it was hypothesized that a short dry period was related to increased proliferation of mammary epithelial cells during the first days in lactation.

    Although the casein composition of milk was related to both plasmin activity in milk and the metabolic status of cows, which are both influenced by dry period length, quantitative differences in casein composition of cows with different dry period length were small. It was concluded that shortening or omitting the dry period of cows with good mammary health obtains milk with a higher protein content with little differences in protein composition.

    Sustainability aspects of ten bedded pack dairy barns in The Netherlands
    Galama, P.J. ; Boer, H.C. de; Dooren, H.J.C. van; Ouweltjes, W. ; Driehuis, K. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research report 873) - 80
    landbouwschuren - melkveehouderij - duurzame veehouderij - huisvesting van koeien - economie van de veehouderij - dierenwelzijn - melkkwaliteit - rundveemest - landbouw en milieu - rundveehouderij - barns - dairy farming - sustainable animal husbandry - cow housing - livestock economics - animal welfare - milk quality - cattle manure - agriculture and environment - cattle husbandry
    A bedded pack barn is a different type of housing for dairy cows compared to the common free stall barns with cubicles and slatted concrete floors with slurry storage underneath (reference system). A bedded pack barn presumably has a different impact on the sustainability aspects economics, animal welfare, milk quality, manure quality and environment. In the present study we have investigated these sustainability aspects on 10 bedded pack barns in the Netherlands.
    Resultaten melk- en grasmonitoring en kwaliteitscontroles 2014 : Landelijk Meetnet Radioactiviteit in Voedsel
    Onstenk, C.G.M. ; Brandhoff, P.N. ; Vos van Avezathe, A. ; Bourgondien, M.J. van; Peters, R.J.B. - \ 2015
    Wageningen : RIKILT Wageningen UR (RIKILT-rapport 2015.004) - 27
    gewasmonitoring - melkkwaliteit - monitoring - radioactiviteit - melkveehouderij - radionucliden - weipoeder - gammaspectrometrie - voedselbesmetting - voedselveiligheid - volksgezondheid - crop monitoring - milk quality - monitoring - radioactivity - dairy farming - radionuclides - dried whey - gamma spectrometry - food contamination - food safety - public health
    Het Landelijk Meetnet Radioactiviteit in Voedsel (LMRV) dient als bewaking voor de voedselproductie en wordt ingezet in het nationale monitoringsprogramma, met name voor de monitoring van radioactiviteit in melk. In dit jaarrapport worden de resultaten van de melk- en grasmonitoring, en van de kwaliteitscontroles van de voedselmonitoren in 2014 gepresenteerd.
    Analysis of effects of Herbabolus on milk quality
    Groot, M.J. ; Alewijn, M. ; Driessen-van Lankveld, W.D.M. ; Lommen, A. ; Stoopen, G.M. ; Venema, D.P. ; Pikkemaat, M.G. ; Rijk, T.C. de - \ 2015
    Wageningen : RIKILT Wageningen UR (RIKILT report 2015.007)
    melkproductie - melkkwaliteit - melkveehouderij - melkkoeien - vergelijkend onderzoek - geneeskrachtige kruiden - milk production - milk quality - dairy farming - dairy cows - comparative research - herbal drugs
    The Herbabolus is a mix of plant components for cows to improve their health during the transition period. The bolus contains a mixture of herbs including garlic (Garlicin), oregano and yucca. The effects of the bolus on milk quality is investigated. The results are discussed in this report.
    Improving bovine udder health: A national mastitis control program in the Netherlands
    Lam, T.J.G.M. ; Borne, B.H.P. van den; Jansen, J. ; Huijps, K. ; Veersen, J.C.L. ; Schaick, G. van; Hogeveen, H. - \ 2013
    Journal of Dairy Science 96 (2013)2. - ISSN 0022-0302 - p. 1301 - 1311.
    management-practices - dairy herds - milk quality - attitudes - communication - performance - farmers - associations - knowledge - england
    Because of increasing bulk milk somatic cell counts and continuous clinical mastitis problems in a substantial number of herds, a national mastitis control program was started in 2005 to improve udder health in the Netherlands. The program started with founding the Dutch Udder Health Centre (UGCN), which had the task to coordinate the program. The program consisted of 2 parts: a research part and a knowledge-transfer part, which were integrated as much as possible. The knowledge-transfer part comprised 2 communication strategies: a central and a peripheral approach. The central approach was based on educating farmers using comprehensive science-based and rational argumentation about mastitis prevention and included on-farm study group meetings. Comprehensive education materials were developed for farmers that were internally motivated to improve udder health. In the peripheral approach it was tried to motivate farmers to implement certain management measures using nontechnical arguments. Mass media campaigns were used that focused on one single aspect of mastitis prevention. These communication strategies, as well as an integrated approach between various stakeholders and different scientific disciplines were used to reach as many farmers as possible. It should be noted that, because this intervention took place at a national level, no control group was available, as it would be impossible to isolate farmers from all forms of communication for 5 years. Based on several studies executed during and after the program, however, the results suggest that udder health seemed to have improved on a national level during the course of the program from 2005 to 2010. Within a cohort of dairy herds monitored during the program, the prevalence of subclinical mastitis did not change significantly (23.0 in 2004 vs. 22.2 in 2009). The incidence rate of clinical mastitis, however, decreased significantly, from 33.5 to 28.1 quarter cases per 100 cow years at risk. The most important elements of the farmers' mindset toward mastitis control also changed favorably. The simulated costs of mastitis per farm were reduced compared with a situation in which the mastitis would not have changed, with € 400 per year. When this amount is extrapolated to all Dutch farms, the sector as a whole reduced the total costs of mastitis by € 8 million per year. It is difficult to assign the improved udder health completely to the efforts of the program due to the lack of a control group. Nevertheless, investing € 8 million by the Dutch dairy industry in a 5-yr national mastitis control program likely improved udder health and seemed to pay for itself financially.
    Sub-optimal economic behaviour with respect to mastitis management
    Huijps, K. ; Hogeveen, H. ; Antonides, G. ; Valeeva, N.I. ; Lam, T.J.G.M. ; Oude Lansink, A.G.J.M. - \ 2010
    European Review of Agricultural Economics 37 (2010)4. - ISSN 0165-1587 - p. 553 - 568.
    milk quality - aversion - farmers - choice - risk
    This study analyses sub-optimal economic behaviour in decision-making of Dutch dairy farmers regarding measures to improve udder health. A low adoption rate and a low level of compliance with advice given to the dairy industry suggest the presence of inertia. Farmers who already had implemented a specific management measure were more likely to continue doing this than farmers who applied a different management regime, regardless of the availability of more effective or lower cost alternatives. Additionally, the results showed that farmers were more sensitive to penalties rather than bonuses aimed at stimulating desired behaviour
    Turkse zuivelketen in een transitieproces
    Wouters, A.P. - \ 2010
    V-focus 7 (2010)3. - ISSN 1574-1575 - p. 28 - 29.
    melkveehouderij - melkvee - melk - melkkwaliteit - gemeenschappelijk landbouwbeleid - europese unie - dairy farming - dairy cattle - milk - milk quality - cap - european union
    De Turkse zuivelketen bevindt zich in een transitieproces van een traditionele keten naar een modern geïndustrialiseerde keten. Er moet echter nog veel gebeuren voordat deze mee kan komen in de EU, met name wat betreft de structuur en efficiëntie in de keten en de melkkwaliteit.
    Suckling systems in calf rearing in organic dairy farming in the Netherlands
    Wagenaar, J.P. ; Langhout, D.J. - \ 2009
    melkveehouderij - zogen - spenen - speengewicht - melkkwaliteit - biologische landbouw - celgetal - dairy farming - suckling - weaning - weaning weight - milk quality - organic farming - somatic cell count
    In an on-farm experiment three calf rearing methods were compared: bucket feeding of milk replacer, bucket feeding of tank milk and suckling of mother or nurse cow up to three months of age. Aim was to determine whether the technical results of suckling systems in calf rearing were satisfactory. Calves reared in a suckling system reached significantly higher liveweights at weaning (90 days). Although the average growth rate between weaning and the age of 1 year did not differ significantly, liveweight at 1 year did still differ significantly. Compared to both bucket fed rearing groups, suckling did not have a significant effect on Somatic Cell Count (SCC) of mothers. Suckling systems in calf rearing in organic dairy production show satisfactory technical results. Calves have the potential to grow fast and no negative effect of suckling on SCC or general animal health were observed.
    Borging van melkwachten = Guarantee of milk guards
    Slaghuis, B.A. ; Schuiling, H.J. ; Verstappen-Boerekamp, J.A.M. ; Ipema, A.H. ; Wemmenhove, H. - \ 2008
    Wageningen : Animal Sciences Group (Rapport / Animal Sciences Group 156) - 22
    melkveehouderij - melkvee - melken - melkkwaliteit - dairy farming - dairy cattle - milking - milk quality
    The adjustments of milk guards were evaluated. The ‘non loading’ alarms don’t need changes. Dairy farmers want to be alarmed better, but have to act on alarms
    Actieve aanpak celgetal loont : deelnemers studiegroepen UGCN realiseren een significant lager celgetal
    Jansen, J. ; Borne, B.H.P. van den - \ 2008
    Veeteelt 25 (2008)1. - ISSN 0168-7565 - p. 12 - 14.
    melkveehouderij - uiers - melkkwaliteit - celgetal - dierziektepreventie - kennisoverdracht - dairy farming - udders - milk quality - somatic cell count - animal disease prevention - knowledge transfer
    Melkveehouders die gemotiveerd in studiegroepen aan uiergezondheid werken, verbeteren de uiergezondheid van hun veestapel. Dat blijkt uit resultaten van studiegroepen van het Uiergezondheidscentrum Nederland. De dierenarts is hierbij de vertrouwenspersoon en de kennisbron. Maar dierenartsen kunnen nog meer betekenen voor de verbetering van de uiergezondheid
    Practical implications of increasing 'natural living' through suckling systems in organic dairy calf rearing; Theme: Values in Organic Agriculture
    Wagenaar, J.P. ; Langhout, D.J. - \ 2007
    NJAS Wageningen Journal of Life Sciences 54 (2007)4. - ISSN 1573-5214 - p. 375 - 386.
    melkkwaliteit - diergedrag - paratuberculose - spenen - zogen - melkvee - biologische landbouw - milk quality - animal behaviour - paratuberculosis - weaning - suckling - dairy cattle - organic farming - calves - cows
    The introduction of suckling systems in organic dairy calf rearing has the potential to enhance animal welfare in terms of ‘natural living’ and to live up to consumers’ expectations about organic agriculture. This study describes the implications of suckling systems in a practical organic dairy context. Results show that farmers can successfully develop and implement a suckling system in calf rearing. The consumption of mothers’ milk resulted in high weaning weights at 3 months of age. No immediate animal health problems linked to suckling systems occurred. Compared with traditional bucket feeding of milk, suckling systems resulted in increased natural behaviour such as calff–cow bonding, natural sucking behaviour and care-taking behaviour. Some farmers had difficulties accepting negative implications of suckling systems such as stress after weaning and loss of marketable milk. Although suckling of the own mother was seen as the most natural suckling system, farmers adapted their suckling system to calves suckling nurse cows. In order to implement successfully a suckling system, farmers have to step back from control and give calf and cow a chance. In the case of increasing ‘natural living’ through implementation of a suckling system, farmers should be encouraged to take enough time to accomplish this attitude change.
    The introduction of suckling systems in organic dairy calf rearing has the potential to enhance animal welfare in terms of 'natural living' and to live up to consumers' expectations about organic agriculture. This study describes the implications of suckling systems in a practical organic dairy context. Results show that farmers can successfully develop and implement a suckling system in calf rearing. The consumption of mothers' milk resulted in high weaning weights at 3 months of age. No immediate animal health problems linked to suckling systems occurred. Compared with traditional bucket feeding of milk, suckling systems resulted in increased natural behaviour such as calf-cow bonding, natural sucking behaviour and care-taking behaviour. Some farmers had difficulties accepting negative implications of suckling systems such as stress after weaning and loss of marketable milk. Although suckling of the own mother was seen as the most natural suckling system, farmers adapted their suckling system to calves suckling nurse cows. In order to implement successfully a suckling system, farmers have to step back from control and give calf and cow a chance. In the case of increasing 'natural living' through implementation of a suckling system, farmers should be encouraged to take enough time to accomplish this attitude change.
    Resultaten monitoring radioactiviteit in Nederlandse melk Periode 2002-2007
    Hattink, J. ; Weseman, J.M. ; Vos Van Avezathe, A. - \ 2007
    Wageningen : RIKILT Wageningen UR (Rapport / RIKILT 2007.018) - 13
    melkproducten - radioactiviteit - melkkwaliteit - monitoring - melkmonsters - radionucliden - milk products - radioactivity - milk quality - monitoring - milking portions - radionuclides
    Dit rapport beschrijft de resultaten van het monitoringproject radioactiviteit in Nederlandse melk. De periode betreft 2002-2007. Het project is uitgevoerd in samenwerking met de, aan het Landelijk Meetnet voor Radioactiviteit in Voedsel (LMRV) verbonden, zuivelfabrieken. Over de hele periode is het niveau van totaal radiocesium bepaald via lage resolutie gammaspectrometie. In 2005 is er tevens specifiek gekeken naar radiostrontium
    Duurmelken bij geiten = Prolonged lactations in goats
    Schuiling, H.J. - \ 2007
    Wageningen : Animal Sciences Group (Rapport / Animal Sciences Group 97) - 17
    geiten - geitenhouderij - melken - melkproductie - productieve levensduur - melkkwaliteit - diergezondheid - schijnzwangerschap - lactatieduur - celgetal - geitenmelk - lactatie - goats - goat keeping - milking - milk production - productive life - milk quality - animal health - pseudopregnancy - lactation duration - somatic cell count - goat milk - lactation
    Het duurmelken van geiten is onderzocht op 6 praktijkbedrijven. Positieve effecten zijn gevonden voor melkproductie, diergezondheid en melkkwaliteit
    Motivation of dairy farmers to improve mastitis management
    Valeeva, N.I. ; Lam, T.J.G.M. ; Hogeveen, H. - \ 2007
    Journal of Dairy Science 90 (2007)9. - ISSN 0022-0302 - p. 4466 - 4477.
    somatic-cell counts - conjoint-analysis - milk quality - bulk milk - herds - suggestions - economics - impact
    The aims of this study were 1) to explore different motivating factors and to quantify their importance in decisions of farmers on improving mastitis management, 2) to evaluate different quality payment schemes as extra incentive mechanisms for farmers, and 3) to link the motivating factors to farmer characteristics. Data on characteristics of farmers were obtained through a traditional paper-based questionnaire (n = 100). Data on the factors motivating farmers to improve mastitis management were collected in a computer-interactive mode. Adaptive conjoint analysis was used to investigate perceptions of farmers of the importance of factors. Factors that are internal to the farm performance and the individual farmer provided more motivation than external factors implying esteem and awareness of the whole dairy sector performance. Internal nonmonetary factors relating to internal esteem and taking pleasure in healthy animals on the farm were equally motivating as monetary factors affecting farm economic performance. The identified difference in perceptions of farmers of importance of extra financial incentive based on bulk milk somatic cell count (BMSCC) depending on whether farmers think in terms of quality premium or penalty for a lower and a higher BMSCC, respectively, suggested that farmers are expected to be more motivated by a price decrease for milk with a greater BMSCC than by a price increase for milk with a lower BMSCC. In this respect, quality penalties were found to be more effective in motivating farmers than quality premiums. Two-stage cluster analysis of individual perceptions resulted in 3 distinct clusters according to motivation of farmers: premium-or penalty-oriented motivation, motivation to have an efficient (well-organized) farm that easily complies with regulatory requirements, and basic economic motivation. The obtained results highlight possible areas of improvement in incentive and educational programs aimed at improving mastitis management.
    Glucogeen rantsoen helpt koe : verlagen melkvet via glucogeen rantsoen zorgt voor verbetering energiebalans
    Knegsel, A.T.M. van; Dijkstra, J. ; Brand, H. van den - \ 2007
    Veeteelt 24 (2007)11. - ISSN 0168-7565 - p. 12 - 14.
    melkkoeien - melkproductie - melkkwaliteit - rundveevoeding - lactatie - voedingsrantsoenen - energiebalans - energetische waarde - zetmeelwaarde - lipiden - zetmeelvertering - dairy cows - milk production - milk quality - cattle feeding - lactation - feed rations - energy balance - energy value - starch equivalent - lipids - starch digestion
    Elke koe kampt aan het begin van de lactatie met een negatieve energiebalans. Aandacht voor de juiste vorm van energie in het rantsoen is geen overbodige luxe, blijkt uit onderzoek. Een glucogeen rantsoen heeft de voorkeur boven een lipogeen rantsoen
    Predippen in de praktijk : onderzoek naar effecten op melkkwaliteit = Pre dipping in practice : a study into the effects on quality of milk
    Poelarends, J.J. - \ 2006
    Lelystad : Animal Sciences Group (Rapport / Animal Sciences Group 18) - 9
    dompelen - melkkwaliteit - melkveehouderij - residuen - voorbehandeling - uiers - diergezondheid - dipping - milk quality - dairy farming - residues - pretreatment - udders - animal health
    This report describes an experiment in which was investigated whether predipping leads to residues in milk
    Proceedings of the Frontis workshop on fresh herbage for dairy cattle : the key to a sustainable food chain
    Elgersma, A. ; Dijkstra, J. ; Tamminga, S. - \ 2006
    Dordrecht : Springer (Wageningen UR Frontis series vol. 18) - ISBN 9781402054518
    melkvee - grasbestand - begrazing - soortenrijkdom - lolium perenne - voeropname - voedingsstoffen - voedersupplementen - graslandbeheer - stikstofmetabolisme - lipiden - melkkwaliteit - diervoeding - duurzaamheid (sustainability) - dairy cattle - herbage - grazing - species richness - lolium perenne - feed intake - nutrients - feed supplements - grassland management - nitrogen metabolism - lipids - milk quality - animal nutrition - sustainability
    Product quality and a sustainable food chain of ruminant products are largely determined by animal nutrition, in which forage is the major feed source. Forages and grasslands play a unique role in agriculture because they contribute through animals to our food supply and to the abatement of environmental problems. Interest in grassland management and grass utilization for dairy production in temperate and subtropical regions has recently led to considerable research efforts. In the past this research often emphasized on plant and animal aspects separately. However, the interrelationship between pasture and the grazing ruminant is a dynamic, two-way process. Many people are not aware of these complex relations, and scientists often focus on either soil-plant interactions, plant production, animal nutrition, animal production or product quality issues. This book contains the contributions of researchers and experts in the field of grassland management and grass utilization. Chapters are arranged in an order that allows progressive development within the food chain, moving from the big picture to basic principles of grassland management and effects on herbage quality, intake and nutrient flows.
    Sporen van boterzuurbacteriën; plaaggeest van kuil tot kaas
    Schooten, H.A. van; Slaghuis, B.A. ; Wemmenhove, H. ; Vissers, M. - \ 2005
    Wageningen : Animal Sciences Group - 31
    melkveehouderij - rauwe melk - melkkwaliteit - boterzuurbacteriën - hygiëne - kuilvoerbereiding - kuilvoerkwaliteit - graskuilvoer - maïskuilvoer - agrarische bedrijfsvoering - dairy farming - raw milk - milk quality - butyric acid bacteria - hygiene - silage making - silage quality - grass silage - maize silage - farm management
    In deze brochure wordt ingegaan op factoren die van invloed zijn op de besmetting van rauwe melk met sporen van boterzuurbacteriën. Daarbij is met name gekeken naar de aspecten van de voederwinning, de bewaring van het voer, de hygiëne op het bedrijf en het melken
    Deskstudie naar de effecten van predippen op uiergezondheid en melkwaliteit = Deskstudy about the effects of predipping on udder health and milk quality
    Poelarends, J.J. - \ 2005
    Lelystad : Animal Sciences Group / Praktijkonderzoek (PraktijkRapport / Animal Sciences Group, Praktijkonderzoek : Rundvee ) - 27
    melkkoeien - diergezondheid - uiers - voorbehandeling - ontsmettingsmiddelen - melkkwaliteit - residuen - dompelen - tepels - mastitis - dierziektepreventie - dairy cows - animal health - udders - pretreatment - disinfectants - milk quality - residues - dipping - teats - mastitis - animal disease prevention
    This report describes a desk study into the effects of predipping on udder health and milk quality. An additional desk study is described about the risks for human health and milk quality if residues from active components, additive components and emollients get into the milk
    Mastitis in dairy production. Current knowledge and future solutions
    Hogeveen, H. - \ 2005
    Wageningen : Wageningen Academic Publishers - ISBN 9789076998701 - 744
    mastitis - melkvee - diergezondheid - dierziekten - diergeneeskunde - melkkwaliteit - mastitis - dairy cattle - animal health - animal diseases - veterinary science - milk quality
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