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.

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    Hydrate sodium calcium aluminosilicate does not reduce rumen lipopolysacharide concentrations in cows
    Pilachai, R. ; Schonewille, J.T. ; Thamrongyoswittayakul, C. ; Aiumlamai, S. ; Wachirapakorn, C. ; Everts, H. ; Vlaeminck, B. ; Doekes, G. ; Hendriks, W.H. - \ 2014
    Animal Feed Science and Technology 191 (2014). - ISSN 0377-8401 - p. 111 - 115.
    subacute ruminal acidosis - dairy-cows - inflammatory response - in-vitro - lipopolysaccharide - smectite - triggers - system - milk
    The efficacy of hydrate sodium calcium aluminosilicate (HSCAS) to reduce the concentrations of free lipopolysaccharide (LPS) in rumen fluid of cows was investigated. Six, rumen-fistulated crossbred Holstein, non-pregnant, dry cows were randomly assigned to three experimental rations in a study with a replicated 3 × 3 Latin square design with 28-d periods. During the first 20 days of each experimental period, cows were offered concentrate (5.4 kg dry matter; DM) without HSCAS and rice straw ad libitum. On day 21, cows were fasted for 12 h prior to commencement of a 7-d measurement period during which time cows were offered concentrate (10.5 kg DM) containing either 0, 5 or 10 g/kg of HSCAS and 1.5 kg DM rice straw. Rumen fluid was collected on days 1, 3 and 7 during the measurement period for analysis of pH, LPS and volatile fatty acids (VFA). Supplemental HSCAS did not affect the pH or the concentrations of total and individual VFA in the ruminal fluid. Mean postprandial rumen pH was reduced to values below 5.6 at all times. Rumen LPS concentrations significantly increased from day 1 to 7 during each measurement period with values ranging from 4489 to 104,000 EU/mL but they were not significantly affected by supplemental HSCAS.
    Diet factors and subclinical laminitis score in lactating cows of smallholder dairy farms in Thailand
    Pilachai, R. ; Schonewille, J.T. ; Thamrongyoswittayakul, C. ; Aiumlamai, S. ; Wachirapakom, C. ; Everts, H. ; Hendriks, W.H. - \ 2013
    Livestock Science 155 (2013)2-3. - ISSN 1871-1413 - p. 197 - 204.
    physically effective fiber - neutral detergent fiber - ruminal ph - milk-yield - cattle - forage - rumen - protein - lesions - digestibility
    The objective of this study was to evaluate the importance of dietary crude protein (CP) content, dietary neutral detergent fiber (NDF) content and feeding regime as well as other factors related to management and demographics on the occurrence of (subclinical) laminitis under practical Thai feeding conditions. Hemorrhage of the white line and the sole, sole ulcer and white-line fissure of all four claws of milking cows (n=119) on 25 farms (selected based on the occurrence of lameness) were macroscopically assessed to calculate the prevalence of subclinical laminitis (SCL) on each farm. Data were collected on farm characteristics, feed and feeding management, floor type and hoof care. Dry matter intake was assessed on each farm and feed ingredients collected and analyzed for dry matter (DM), CP and NDF. No significant differences were found for farm characteristics such as herd size, number of milking cows, parity and body condition scoring between farms with a low (25%) of SCL. Percentages of DM and CP content of the rations did not differ, whereas mean NDF content in the ration was significantly higher in the low compared to the high prevalence farms. Multiple regression analysis of the data showed that a ration low in NDF content and/or in combination with the separate feeding of roughage and concentrate was associated with a high SCL prevalence. The results suggest that mixing concentrate with a substantial part of the roughage is an important strategy to prevent SCL in smallholder dairy farms under Thai feeding conditions. In addition, the dietary NDF content but not the dietary CP level is associated with SCL prevalence in dairy cows under Thai feeding conditions.
    Improved acceptance of Chromonaela odorata by goat kids after weaning is triggered by in utero exposure but nog consumption of milk
    Hai, P.V. ; Schonewille, J.T. ; Tien, D.V. ; Everts, H. ; Hendriks, W.H. - \ 2013
    Applied Animal Behaviour Science 146 (2013). - ISSN 0168-1591 - p. 66 - 71.
    chromolaena-odorata - feeding-behavior - food preference - amniotic-fluid - maternal diet - tropical weed - pregnant ewes - fetal - sheep - taste
    The aim of the current study was to determine whether the improved post-weaning intake of Chromonaela odorata by goat kids is related to either the in utero period of the goat kids or the subsequent suckling period. It was hypothesized that kids born to dams fed C. odorata during pregnancy and receiving milk from dams not exposed to C. odorata during pregnancy show an improved acceptance to consume this plant. Twenty female goats were successfully synchronized and divided into 4 groups. Two groups (1 and 3) were offered 50 g of dried C. odorata leave meal (COLM) mixed with a basic diet for the last 3 months of pregnancy until 1 week before parturition. At birth the kids from the goats in group 1 and 2 were cross fostered without colostrum or milk from their own mother. While waiting for the delivery of kid from another goat, the kid was fed milk replacer or milk from any goat dam in the same treatment. Kids from groups 3 and 4 remained with their mothers. After weaning (2.5 months old), one kid from each goat dam was selected for COLM intake which was measured for 30 min over a 4 week period. Feeding activities of the individually housed goat kids was monitored with a camera system. Kids born to dams receiving COLM during pregnancy consumed higher amounts of the COLM supplemented test feed during all feeding preference tests compared to kids from the control group, particularly during week 3 and 4 (P <0.001). Shorter latency, longer time spent on each meal and total eating time, chewing time and higher meal size (P <0.05) were different in the kids born from does that ingested COLM during pregnancy. It is concluded that prenatal exposure to C. odorata via maternal ingestion significantly increases the intake of C. odorata by weaned goat kids. This improved intake is due to the in utero learning and not the transfer of (secondary) components via the milk of the mothers fed C. odorata during pregnancy.
    Methane production in warmblood ponies fed either a roughage only or a roughage plus concentrate diet
    Dansen, O. ; Pellikaan, W.F. ; Hendriks, W.H. ; Dijkstra, J. ; Jacobs, M.P.T. ; Everts, H. ; Doorn, D.A. van - \ 2013
    In: Proceedings of the 5th Greenhouse Gases and Animal Agriculture Conference (GGAA2013). - Cambridge : Cambridge University Press - ISBN 9780906562697 - p. 517 - 517.
    Methane production in warmblood ponies fed either a roughage or a roughage plus concentrate ration
    Dansen, O. ; Pellikaan, W.F. ; Hendriks, W.H. ; Dijkstra, J. ; Jacobs, M.P.T. ; Everts, H. ; Doorn, D.A. van - \ 2013
    In: Proceedings of the 6th Edition Horse Health Nutrition - European Equine Health & Nutrition Congress. - EEHNC - p. 176 - 176.
    Mineralen-, sporenelementen- en vitaminenbehoeften van paarden
    Top, A.M. van den; Blok, M.C. ; Everts, H. - \ 2012
    Lelystad : CVB, Productschap Diervoeder (CVB-documentatierapport nr. 54) - 68
    paarden - diervoeding - voeding - voedering - voedingsstoffen - mineralenvoeding - sporenelementen - vitaminen - horses - animal nutrition - nutrition - feeding - nutrients - mineral nutrition - trace elements - vitamins
    In deze publicatie wordt beschreven hoe de in CVB verband tot stand gekomen voedernormen voor deze voedingsstoffen tot stand zijn gekomen. De publicatie is het resultaat van een deskstudie waarbij allereerst de Duitse DLG normen en de Amerikaanse NRC normen zijn geëvalueerd. Daar waar nodig is gericht gekeken of er nieuwe studies beschikbaar zijn, of is teruggegrepen op de oorspronkelijke publicaties. Voor de macromineralen (calcium, fosfor, magnesium, natrium, kalium, chloor) zijn de voedernormen gebaseerd op de zgn. factoriële methode. Voor sporenelementen en de vitamines bleek deze benadering niet mogelijk. Het rapport bevat een groot aantal tabellen waarin de voedernormen voor de genoemde nutriënten voor alle relevante fysiologische stadia.
    The effects of high levels of rumen degradable protein on rumen pH and histamine concentrations in dairy cows
    Pilachai, R. ; Schonewille, J.T. ; Thamrongyoswittayakul, C. ; Aiumlamai, S. ; Wachirapakom, C. ; Everts, H. ; Hendriks, W.H. - \ 2012
    Journal of Animal Physiology and Animal Nutrition 96 (2012)2. - ISSN 0931-2439 - p. 206 - 213.
    ruminal degradability - low-quality - acidosis - carbohydrate - cattle - fermentation - laminitis - digestion - histidine - system
    An experiment was conducted to test the hypothesis that the supplementation of crude protein (CP) results in rumen acidosis and increased histamine concentrations in dairy cows. Six ruminally fistulated, non-pregnant dry cows were fed three experimental rations in a replicated 3 × 3 Latin square design. The CP contents in the low-CP, the high rumen undegradable protein (high-RUP) and the high rumen degradable protein (high-RDP) rations were 112, 259 and 266 g/kg dry matter (DM) respectively. The cows were fed 7.7 kg DM of the concentrates and 2.7 kg DM of rice straw. High levels of RDP in the ration significantly increased the ammonia, total volatile fatty acid (VFA) and histamine concentrations in the rumen fluid. However, supplemental CP, whether degradable or undegradable, did not significantly affect the pH of rumen fluid. Plasma urea nitrogen concentration was higher in both high-RDP and high-RUP in relation to cows fed the low-CP ration. The rise in ruminal histamine concentrations was physiologically non-relevant, most likely because rumen pH was not affected by supplemental CP at the installed level of DM intake. Therefore, it can be concluded that the issue of supplemental CP, rumen pH and ruminal histamine concentrations has not yet been settled. Further research is warranted to understand these relationships.
    Feeding Chromonaela odorata during pregnancy to goat dams affects acceptance of this feedstuff by their offspring
    Hai, P.V. ; Everts, H. ; Tien, D. van; Schonewille, J.T. ; Hendriks, W.H. - \ 2012
    Applied Animal Behaviour Science 137 (2012)1-2. - ISSN 0168-1591 - p. 30 - 35.
    food preference - chromolaena-odorata - sensitive period - amniotic-fluid - maternal diet - tropical weed - behavior - lambs - exposure - flavor
    We investigated the effect of Chromonaela odorata ingestion by goat dams during pregnancy on intake of C. odorata by their kids. Alteration of prenatal feed preference may be used to increase feed intake of novel feeds and the transit from outdoor to indoor goat farming in Vietnam. Ten female goats were synchronized, inseminated and divided randomly into 2 equal groups. The experimental group was offered 50 g of sun dried C. odorata leave meal (COLM) along with a basal diet from day 45 to 135 of pregnancy while the control group was offered only the basal diet during this period. After weaning (3 mo), one kid from each goat dam in both groups was randomly selected and housed in individual cages. After a 9.5 h fast, each kid was offered 50 g of COLM daily at 8:30 am for 30 min for 4 weeks. Feeding activities were monitored with a video camera system. We determined mean COLM intake and indices of feed acceptance including latency to eat, number of visits without intake, meal frequency, eating bout length, eating time, intake rate, meal size and chewing time for each kid. Intake of COLM by goat kids born to dams fed COLM was significantly higher over the 4 weeks compared to goat kids born to dams not fed COLM (11.32 ± 3.60 g vs. 6.09 ± 1.91 g, P <0.028). This difference was more pronounced during weeks 3 and 4 than weeks 1 and 2. Goat kids from mothers fed COLM had a shorter latency to eat, a larger meal size and a longer chewing time than kids from mothers not fed COLM during pregnancy. We conclude that in utero transmission of feeding preference occurred from does to their offspring.
    Starch source in high concentrate rations does not affect rumen pH, histamine and lipopolysaccharide concentrations in dairy cows
    Pilachai, R. ; Schonewille, J.T. ; Thamrongyoswittayakul, C. ; Aiumlamai, S. ; Wachirapakom, C. ; Everts, H. ; Hendriks, W.H. - \ 2012
    Livestock Science 150 (2012)1-3. - ISSN 1871-1413 - p. 135 - 142.
    subacute ruminal acidosis - induced lactic-acidosis - inflammatory response - cattle - fermentation - endotoxin - degradation - performance - steers - fluid
    The replacement of ground corn by cassava meal on rumen pH, lipopolysaccharide (LPS) and histamine concentrations under typical Thai feeding conditions (high concentrate diets and rice straw as the sole source of roughage) was investigated. Four rumen-fistulated crossbred Holstein, non-pregnant, dry cows were randomly assigned to the four experimental rations in a 4×4 Latin square design with 21-d periods. Each period consisted of a 14-d run-in/wash out period, followed by a 7-d experimental period. During the run-in/wash out period, the cows were offered 5.4 kg DM of concentrate containing 4.6% cassava meal and rice straw was provided ad libitum. During the 7 day of each experimental period, cows were offered 10.5 kg DM of concentrate containing either 4.6% or 18.3% or 32.4% or 46.2% cassava meal and 1.5 kg of rice straw. Irrespective of dietary treatments, rumen total VFA and lactate concentrations were significantly affected by sampling day, which were significantly higher on day 1 versus days 3 and 7 of the experimental periods. Mean postprandial rumen pH was reduced to values
    Dietary and animal-related factors associated with the rate of urinary oxalate and calcium excretion in dogs and cats
    Dijcker, J.C. ; Hagen-Plantinga, E.A. ; Everts, H. ; Bosch, G. ; Kema, I.P. ; Hendriks, W.H. - \ 2012
    Veterinary Record 171 (2012)2. - ISSN 0042-4900 - 7 p.
    ligament insufficiency - diagnostic-accuracy - arthrography
    This paper reports the results of a cohort study and randomised clinical trial (RCT) in cross-over design. In the cohort study, the range of urinary oxalate (Uox) and calcium (Uca) excretion was determined within a sample of the Dutch population of dogs and cats, and dietary and animal-related factors associated with these urine parameters were identified. Spot urine samples were collected from privately owned dogs (n=141) and cats (n=50). The RCT determined the effect of a commercial raw meat diet versus a dry diet on Uox and Uca excretion rate in 23 dogs. In the cohort study, Uox excretion ranged from 21.1 to 170.6 mmol oxalate/mol creatinine in dogs and 27.5 to 161.6 in cats. Urinary calcium excretion ranged from 3.4 to 462.8 mmol calcium/mol creatinine in dogs and 10.1 to 128.0 in cats. In dogs, increased Uox and Uca excretion was associated with (1) the intake of a dry diet as the primary source of energy, (2) receiving no snacks and (3) breed. Increased Uox excretion was associated with males as well. In cats, urine collection in anaesthetised subjects was identified as a confounder. In the RCT, feeding the dry diet resulted in higher Uox (P
    Guest Editorial: Practising emotions
    Everts, J. ; Wagner, L.B. - \ 2012
    Emotion, Space and Society 5 (2012)3. - ISSN 1755-4586 - p. 174 - 176.
    Raw meat diet reduces urinary oxalate and calcium excretion rate in dogs
    Dijcker, J.C. ; Hagen-Plantinga, E.A. ; Everts, H. ; Bosch, G. ; Kema, I.P. ; Hendriks, W.H. - \ 2012
    In: Proceedings of the 37th Animal Nutrition Research Forum, Wageningen, The Netherlands, 18 April 2012. - Wageningen : Wageningen University - p. 11 - 12.
    Restoration of Wet Dune Slacks on the Dutch Wadden Sea Islands: Recolonization After Large-Scale Sod Cutting
    Grootjans, A.P. ; Everts, H. ; Bruin, K. ; Fresco, L. - \ 2011
    Restoration Ecology 9 (2011)2. - ISSN 1061-2971 - p. 137 - 146.
    The effects of sod cutting were studied in a dune area on the Dutch Wadden Sea Island of Texel. Sod cutting was carried out in a range of different dune slacks in order to restore dune slack vegetation with many endangered Red List species. Sod cutting removed approximately 96% of the soil seed bank. Species abundant in the seed bank, notably Juncacea, also had a high frequency in the vegetation that established during the first year after the restoration measures. Many other species not registered in the seed bank or in the former vegetation also appeared. Species richness in the monitored plots exceeded that of uncut reference plots after a few years. Colonization rates were higher than extinction rates in most plots, indicating that a stable state has not been reached after 5 years. Differences in species richness between slacks appeared to be related to the occurrence of source areas nearby and availability of dispersal agents, such as flooding and animals.
    Effect of different additives on ensiling Leucaena Leucocephala
    Wongsanit, Jaturong ; Schonewille, J.T. ; Rukkhamsuk, Theera ; Everts, H. ; Hendriks, W.H. - \ 2010
    - p. 2017 - 2018.
    The effect of variable proportions rapid degradable carbohydrate on rumen pH and endotoxin concentrations in diary cows
    Pilachai, R. ; Schonewille, J.T. ; Chaiyotwittayakun, A. ; Wachirapakorn, C. ; Everts, H. ; Hendriks, W.H. - \ 2010
    - p. 226 - 227.
    The effects of feeding chromonaela odorata to goat dams during pregnancy on better acceptance of this feedstuff by their offspring: learning in utero or by consuming milk
    Hai, P.V. ; Schonewille, J.T. ; Tien, D.V. ; Everts, H. ; Hendriks, W.H. - \ 2010
    Vitamin B12 Deficiency Stimulates Osteoclastogenesis via Increased Homocysteine and Methylmalonic Acid
    Vaes, B.L.T. ; Lute, C. ; Blom, H.J. ; Bravenboer, N. ; Vries, T.J. de; Everts, V. ; Dhonukshe-Rutten, R.A.M. ; Müller, M.R. ; Groot, C.P.G.M. de; Steegenga, W.T. - \ 2009
    Calcified Tissue International 84 (2009)5. - ISSN 0171-967X - p. 413 - 422.
    bone-mineral density - randomized controlled-trial - postmenopausal women - in-vitro - plasma homocysteine - pernicious-anemia - turnover markers - older persons - elderly-women - hip fracture
    The risk of nutrient deficiencies increases with age in our modern Western society, and vitamin B12 deficiency is especially prevalent in the elderly and causes increased homocysteine (Hcy) and methylmalonic acid (MMA) levels. These three factors have been recognized as risk factors for reduced bone mineral density and increased fracture risk, though mechanistic evidence is still lacking. In the present study, we investigated the influence of B12, Hcy, and MMA on differentiation and activity of bone cells. B12 deficiency did not affect the onset of osteoblast differentiation, maturation, matrix mineralization, or adipocyte differentiation from human mesenchymal stem cells (hMSCs). B12 deficiency caused an increase in the secretion of Hcy and MMA into the culture medium by osteoblasts, but Hcy and MMA appeared to have no effect on hMSC osteoblast differentiation. We further studied the effect of B12, Hcy, and MMA on the formation of multinucleated tartrate-resistant acid phosphatase¿positive osteoclasts from mouse bone marrow. We observed that B12 did not show an effect on osteoclastogenesis. However, Hcy as well as MMA were found to induce osteoclastogenesis in a dose-dependent manner. On the basis of these results, we conclude that B12 deficiency may lead to decreased bone mass by increased osteoclast formation due to increased MMA and Hcy levels.
    Restauratie van schraallanden op veengronden door afgraven en vernatten [thema restauratie van natte schraallanden]
    Grootjans, A. ; Kemmers, R.H. ; Everts, H. ; Adema, E. - \ 2007
    De Levende Natuur 108 (2007)3. - ISSN 0024-1520 - p. 108 - 113.
    veengronden - bodemchemie - vegetatie - herstel - hooiland - hydrologie - plaggen steken - beekdalen - herstelbeheer - friesland - drenthe - peat soils - soil chemistry - vegetation - rehabilitation - meadows - hydrology - sod cutting - brook valleys - restoration management - friesland - drenthe
    Verdroging van veengronden is een veel voorkomend verschijnsel in beekdalen. Hoewel hydrologisch herstel een eerste vereiste is, zijn aanvullende maatregelen wenselijk. In deze obn bijdrage wordt verslag gedaan van ervaringen met het plaggen in De Lage Maden (Drentse Aa), De Barten (Linde) en De Wyldlannen (lage midden, Friesland)
    Monstername en analyse van N-mineraal in de bodem en nitraat in het grondwater
    Hoving, I.E. ; Everts, H. ; Chardon, W.J. - \ 2005
    Lelystad : Animal Sciences Group (Reeks sturen op nitraat 14) - 38
    nitraten - stikstof - bodemwater - bodem - bemonsteren - analyse - landbouw - nederland - nitrates - nitrogen - soil water - soil - sampling - analysis - agriculture - netherlands
    Beschrijving methoden en -technieken van bemonstering bodem op N-mineraal en grondwater op nitraat toegepast in het project Sturen Op Nitraat
    Health and growth of veal calves fed milk replacers with or without probiotics
    Timmerman, H.M. ; Mulder, L. ; Everts, H. ; Espen, D.C. van; Wal, E. van der; Klaassen, G. ; Rouwers, S.M.G. ; Hartemink, R. ; Rombouts, F.M. ; Beynen, A.C. - \ 2005
    Journal of Dairy Science 88 (2005)6. - ISSN 0022-0302 - p. 2154 - 2165.
    antibiotic-associated diarrhea - lactic-acid bacteria - lactobacillus-gg - prevention - infection - stress - supplementation - malabsorption - typhimurium - performance
    Four experiments with 1-wk-old veal calves were conducted to assess the influence of probiotics on growth and health indicators. In experiments 1 and 2, the liquid probiotic supplements were administered daily from experimental d 1 to 15. The treatment period in experiments 3 and 4 was extended to 56 d. The probiotics used were a multispecies probiotic (MSPB) containing different probiotic species of human origin, or a calf-specific probiotic (CSPB) containing 6 Lactobacillus species isolated from calf feces and selected on the basis of a combination of characteristics. When the data for the 4 experiments were pooled, the probiotics enhanced growth rate during the first 2 wk. During the 8-wk experimental period, average daily gain and feed efficiency were significantly improved in the probiotic-treated groups. The MSPB-induced increase in weight gain was greater when the control calves were considered less healthy based on a health score (an index of diarrhea and therapeutic treatments). Probiotic treatment tended to diminish mortality. The CSPB treatment reduced the incidence of diarrhea and the fecal counts of coliforms. When therapeutic treatment was intensive in the control calves, the ingestion of probiotics reduced the percentage of calves that required therapy and the amount of treatments needed against digestive or respiratory diseases. There was no clear difference in the efficiency of the MSPB and CSPB preparations. Further research is necessary to identify underlying mechanisms and to evaluate the potential of probiotics to improve respiratory health in veal calf production.
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