Wouter Spek

dr.ir.

    20082020

    Research output per year

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    Research Output

    2020

    Review: Impact of protein and energy supply on the fate of amino acids from absorption to milk protein in dairy cows

    Lapierre, H., Martineau, R., Hanigan, M. D., Van Lingen, H. J., Kebreab, E., Spek, J. W. & Ouellet, D. R., 1 Mar 2020, In : Animal. 14, S1, p. S87-S102

    Research output: Contribution to journalArticleAcademicpeer-review

    1 Citation (Scopus)
    2019

    Energiebehoefte van droogstaande en lacterende Holstein Friesian koeien

    Spek, J. W. & Šebek, L. B., 2019, Wageningen: Wageningen Livestock Research. 34 p. (Wageningen Livestock Research rapport; no. 1211)

    Research output: Book/ReportReportProfessional

    Open Access
    2018
    Open Access
    1 Citation (Scopus)

    Minimum dietary standardized ileal digestible isoleucine to leucine ratio for laying hens

    Spek, J. W., Jun 2018, Wageningen: Wageningen Livestock Research. 18 p. (CVB documentation report; no. nr. 75)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible arginine requirement for broilers

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 17 p. (CVB documentation report; no. nr. 68)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible isoleucine requirement for broilers

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 18 p. (CVB documentation report; no. nr. 67)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible isoleucine requirement for laying hens

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 32 p. (CVB documentation report; no. nr. 74)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible lysine requirement for broilers

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 46 p. (CVB documentation report; no. nr. 62)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible lysine requirement for laying hens

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 41 p. (CVB documentation report; no. nr. 69)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible methionine and cysteine requirement for broilers

    Spek, J. W., Jun 2018, Wageningen: Wageningen Livestock Research. 50 p. (CVB documentation report; no. nr. 63)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible methionine and cysteine requirement for laying hens

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 46 p. (CVB documentation report; no. nr. 70)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible threonine requirement for broilers

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 30 p. (CVB documentation report; no. nr. 64)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible threonine requirement for laying hens

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 25 p. (CVB documentation report; no. nr. 71)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible tryptophan requirement for broilers

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 27 p. (CVB documentation report; no. nr. 65)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible tryptophan requirement for laying hens

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 21 p. (CVB documentation report; no. nr. 72)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible valine requirement for broilers

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 21 p. (CVB documentation report; no. nr. 66)

    Research output: Book/ReportReportProfessional

    Open Access

    Standardized ileal digestible valine requirement for laying hens

    Spek, J. W., 2018, Wageningen: Wageningen Livestock Research. 19 p. (CVB documentation report; no. nr. 73)

    Research output: Book/ReportReportProfessional

    Open Access
    2017

    Determination of pre-cecal phosphorus digestibility of inorganic phosphates and bone meal products in broilers

    van Harn, J., Spek, J. W., van Vuure, C. A. & van Krimpen, M. M., 2017, In : Poultry Science. 96, 5, p. 1334-1340

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
    4 Citations (Scopus)
    2016

    CVB Veevoedertabel 2016 : chemische samenstellingen en nutritionele waarden van voedermiddelen

    Blok, M. C. & Spek, J. W., 2016, Netherlands: CVB. 629 p.

    Research output: Book/ReportReportProfessional

    Open Access

    Energie en eiwitwaardeschatting gras-klaverkuilen

    van Schooten, H. A. & Spek, J. W., 2016, Wageningen: Wageningen Livestock Research. 33 p. (Wageningen Livestock Research rapport; no. 994)

    Research output: Book/ReportReportProfessional

    Open Access

    Influence of milk urea concentration on fractional urea disappearance rate from milk to blood plasma in dairy cows

    Spek, J. W., Dijkstra, J. & Bannink, A., 2016, In : Journal of Dairy Science. 99, 5, p. 3880-3888

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
    1 Citation (Scopus)

    Phytate degradation in broilers

    van Krimpen, M. M., van Emous, R. A., Spek, J. W. & Kwakernaak, C., 2016, Wageningen: Wageningen Livestock Research. 50 p. (Wageningen Livestock Research report; no. 978)

    Research output: Book/ReportReportProfessional

    Open Access

    Precaecal phosphorus digestibility of inorganic phosphate sources in male broilers

    Bikker, P., Spek, J. W., van Emous, R. A. & van Krimpen, M. M., 2016, In : British Poultry Science. 57, 6, p. 810-817

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
    4 Citations (Scopus)
    Open Access
    Open Access
    Open Access

    Tabellenboek Veevoeding 2016 : voedernormen varkens en voederwaarden voedermiddelen voor varkens

    van Duinkerken, G. & Spek, J. W., 2016, Rijswijk: Federatie Nederlandse Diervoederketen. 35 p. (CVB-reeks; no. nr. 53)

    Research output: Book/ReportReportProfessional

    Open Access
    2014

    Quantifying the impact of nutritional, animal and farm management factors on variation in milk urea content as a proxy for N excretion

    Bannink, A., Spek, J. W., St-Pierre, J. L., France, J. & Dijkstra, J., 2014, Proceedings of the 8th International Workshop on Modelling Nutrient Digestion and Utilisation in Farm Animals. McNeill, D. M. & Bell, A. W. (eds.). CSIRO Publishing, Vol. 54. p. xxxi

    Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

    Relationship between chemical composition and in situ rumen degradation characteristics of maize silages in dairy cows

    Ali, M., van Duinkerken, G., Cone, J. W., Klop, A., Blok, M. C., Spek, J. W., Bruinenberg, M. H. & Hendriks, W. H., 2014, In : Animal. 8, 11, p. 1832-1838

    Research output: Contribution to journalArticleAcademicpeer-review

    9 Citations (Scopus)
    2013
    Open Access
    42 Citations (Scopus)

    Diet effects on urine composition of cattle and N20 emissions

    Dijkstra, J., Oenema, O., van Groenigen, J. W., Spek, J. W., van Vuuren, A. M. & Bannink, A., 2013, In : Animal. 7, S2, p. 292-302

    Research output: Contribution to journalArticleAcademicpeer-review

    141 Citations (Scopus)
    Open Access
    16 Citations (Scopus)

    Interactions between enteric methane and nitrogen excretion in dairy cows

    Bannink, A., Ellis, J. L., Mach, N., Spek, J. W. & Dijkstra, J., 2013, In : Advances in Animal Biosciences. 4, s1, p. 19-27

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
    40 Citations (Scopus)

    Stikstofverliezen beter inschatten

    Spek, J. W., Bannink, A. & Dijkstra, J., 2013, In : Veeteelt. 30, 17, p. 20-22

    Research output: Contribution to journalArticleProfessional

    Open Access

    The impact of nutritional, animal and farm management factors on variation in milk urea content

    Bannink, A., Spek, J. W., Ellis, J. L. & Dijkstra, J., 2013, Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA. Oltjen, J. W., Kebreab, E. & Lapierre, H. (eds.). Wageningen: Wageningen Academic Publishers, Vol. 134. p. 227-228

    Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

    Open Access
    2012
    Open Access
    32 Citations (Scopus)

    Prediction of urinary nitrogen excretion in urine from lactating dairy cattle in Western Europe: A meta-analysis

    Spek, J. W., Dijkstra, J. & Bannink, A., 2012, Proceedings of the 37th Animal Nutrition Research Forum, Wageningen, The Netherlands, 18 April 2012. Cone, J. (ed.). Wageningen: Wageningen University, p. 59-60

    Research output: Chapter in Book/Report/Conference proceedingAbstract

    Open Access

    Short communication: Assessing urea transport from milk to blood in dairy cows

    Spek, J. W., Dijkstra, J., van den Borne, J. J. G. C. & Bannink, A., 2012, In : Journal of Dairy Science. 95, 11, p. 6536-6541

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
    3 Citations (Scopus)
    2011

    Effect of sodium chloride intake on urea concentration in milk from dairy cows

    Spek, J. W., Dijkstra, J., van den Borne, J. J. G. C. & Bannink, A., 2011, 2011 annual Meeting abstracts. Vol. 94. p. 736

    Research output: Chapter in Book/Report/Conference proceedingAbstract

    Effect of urine production on milk urea nitrogen as estimator of urinary nitrogen and urea excretion in North america and Europe in dairy cattle. A meta-analysis

    Spek, J. W., Bannink, A. & Dijkstra, J., 2011, Proceedings of the 8th International Symposium on the Nutrition of Herbivores (ISHN8), Aberystwyth, Wales, UK, 6-9 September 2011. Thomas, C. (ed.). Cambridge: Cambridge University Press, Vol. 2. p. 558-558

    Research output: Chapter in Book/Report/Conference proceedingAbstract

    Urea transfer between blood and milk in dairy cows. A pilot study

    Spek, J. W., Bannink, A., van den Borne, J. J. G. C. & Dijkstra, J., 2011, Proceedings of the 36th Animal Nutrition Research Forum - A platform to present Animal Nutrition Research in Belgium and the Netherlands, Heverlee, The Netherlands, 19 April 2011. Heverlee: Faculteit Bio-ingenieurswetenschappen, K.U. Leuven, p. 79-80

    Research output: Chapter in Book/Report/Conference proceedingConference paper

    Open Access
    2009

    Effects of pH, temperature and osmolality on the level and composition of soluble N in feedstuffs for ruminants.

    de Jonge, L. H., Spek, J. W., van Laar, H. & Dijkstra, J., 2009, In : Animal Feed Science and Technology. 153, 3-4, p. 249-262

    Research output: Contribution to journalArticleAcademicpeer-review

    18 Citations (Scopus)

    The effect of pH and osmolality on the level and composition of soluble N in untreated legumes for ruminants

    de Jonge, L. H., Spek, J. W., van Laar, H. & Dijkstra, J., 2009, XIth International Symposium on Ruminant Physiology, Clermont-Ferrand, France, 6 - 9 September, 2009. Chilliard, Y., Glasser, F., Faulconnier, Y., Bocquier, F., Veissier, I. & Doreau, M. (eds.). Wageningen: Wageningen Academic Publishers, p. 152-153

    Research output: Chapter in Book/Report/Conference proceedingConference paper

    Ureum als instrument om eiwitvoeding te sturen nog niet betrouwbaar: Kengetal ureumgehalte beter benutten

    Spek, J. W., Bannink, A. & Dijkstra, J., 2009, In : Veeteelt. 26, 6, p. 28-29

    Research output: Contribution to journalArticleProfessional

    Open Access