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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    Understanding the gastrointestinal physiology and responses to feeding in air-breathing Anabantiform fishes
    Goodrich, Harriet R. ; Bayley, Mark ; Birgersson, Lina ; Davison, William G. ; Johannsson, Ora E. ; Kim, Anne B. ; My, Phuong Le; Tinh, Tran H. ; Thanh, Phuong N. ; Thanh, Huong Do Thi ; Wood, Chris M. - \ 2020
    Journal of Fish Biology 96 (2020)4. - ISSN 0022-1112 - p. 986 - 1003.
    acid–base regulation - ammonia excretion - feeding - gut - ion regulation - urea excretion

    The Mekong Delta is host to a large number of freshwater species, including a unique group of facultative air-breathing Anabantiforms. Of these, the striped snakehead (Channa striata), the climbing perch (Anabas testudineus), the giant gourami (Osphronemus goramy) and the snakeskin gourami (Trichogaster pectoralis) are major contributors to aquaculture production in Vietnam. The gastrointestinal responses to feeding in these four species are detailed here. Relative intestinal length was lowest in the snakehead, indicating carnivory, and 5.5-fold greater in the snakeskin, indicating herbivory; climbing perch and giant gourami were intermediate, indicating omnivory. N-waste excretion (ammonia-N + urea-N) was greatest in the carnivorous snakehead and least in the herbivorous snakeskin, whereas the opposite trend was observed for net K+ excretion. Similarly, the more carnivorous species had a greater stomach acidity than the more herbivorous species. Measurements of acid–base flux to water indicated that the greatest postprandial alkaline tide occurred in the snakehead and a potential acidic tide in the snakeskin. Additional findings of interest were high levels of both PCO2 (up to 40 mmHg) and HCO3 (up to 33 mM) in the intestinal chyme of all four of these air-breathing species. Using in vitro gut sac preparations of the climbing perch, it was shown that the intestinal net absorption of fluid, Na+ and HCO3 was upregulated by feeding but not net Cl uptake, glucose uptake or K+ secretion. Upregulated net absorption of HCO3 suggests that the high chyme (HCO3 ) does not result from secretion by the intestinal epithelium. The possibility of ventilatory control of PCO2 to regulate postprandial acid–base balance in these air-breathing fish is discussed.

    Entry Points for Reduction of Greenhouse Gas Emissions in Small-Scale Dairy Farms: Looking Beyond Milk Yield Increase
    Vries, Marion de; Zahra, Windi Al ; Wouters, Adriaan P. ; Middelaar, Corina E. van; Oosting, Simon J. ; Tiesnamurti, Bess ; Vellinga, Theun V. - \ 2019
    Frontiers in Sustainable Food Systems 3 (2019). - ISSN 2571-581X
    climate change mitigation - dairy cattle - feeding - greenhouse gases - manure management

    Increasing milk yield per cow is considered a promising climate change mitigation strategy for small-scale dairy farms in developing countries. As it can be difficult to increase cow productivity, mitigation options beyond this production strategy need to be identified. The aim of this study was to identify entry points for mitigation of GHG emissions in small-scale dairy farms in Lembang Sub-district, West Java, Indonesia. Data on herd composition, productivity, feeding, and manure management were collected in a survey of 300 randomly selected dairy farms. Characteristics of farms with the 25% lowest (<3291 kg milk/cow/y), medium 50% (3291–4975 kg milk/cow/y), and 25% highest milk yields (≥4976 kg milk/cow/y) were compared. Life cycle assessment was then performed to estimate the cradle-to-farm gate GHG emission intensity (EI) of farms. The relationship between EI and milk yield per cow for all farms was modeled and farms with an EI below and above their predicted EI were compared (“low” and “high” EI farms). Results showed that milk yield explained 57% of the variance in EI among farms. Farms with medium and high milk yields were more often specialized farms, fed more tofu waste and compound feed, and had higher feed costs than farms with low milk yields (P < 0.05). Farms with high milk yields also applied less manure on farm land than farms with low milk yields (P < 0.05). Low EI farms had fewer cows, and fed less rice straw, more cassava waste, and more compound concentrate feed (particularly the type of concentrates consisting largely of by-products from milling industries) than high EI farms (P < 0.05). In addition, low EI farms discharged more manure, stored less solid manure, used less manure for anaerobic digestion followed by daily spreading, and applied less manure N on farmland than high EI farms (P < 0.05). Some associations were affected by confounding factors. Farm management factors associated with milk yield and the residual variation in EI were considered potential entry points for GHG mitigation. Feeding less rice straw and discharging manure, however, were considered unsuitable mitigation strategies because of expected trade-offs with other environmental issues or negative impacts on food-feed competition.

    How to get every piglet eating
    Middelkoop, Anouschka ; Choudhury, R. - \ 2017
    creep feeding - feed intake - weaning - feeding - research
    Behavioural adaptation to a short or no dry period with associated management in dairy cows
    Kok, A. ; Hoeij, R.J. van; Tolkamp, B.J. ; Haskell, M.J. ; Knegsel, A.T.M. van; Boer, I.J.M. de; Bokkers, E.A.M. - \ 2017
    Applied Animal Behaviour Science 186 (2017). - ISSN 0168-1591 - p. 7 - 15.
    rest period - lying - feeding - cattle - trasition period - sensor data
    From calving, dairy cows are typically milked for about a year, and subsequently managed to have a non-lactating or ‘dry period’ (DP) before next calving. However, the use of a DP may reduce cow welfare because typical DP management involves the cow changing groups and ration. Also, the DP results in a severe negative energy balance after calving. Shortening or omitting the DP may have beneficial effects on cow welfare through fewer changes in management before calving, and a lower milk yield after calving. Our objective was to assess the effects of no DP and a short DP (30 days) with associated management on feeding, lying, and number of steps of dairy cows in late gestation and early lactation. Feeding behaviour was recorded by computerized feeders for 122 periods (42 with a short DP and 80 with no DP) from week −6 to week 7 relative to calving. Steps and lying behaviour of 81 of these cows (28 with a short DP and 53 with no DP) were recorded with accelerometers in week −4 and in week 4 relative to calving only. Effects of DP treatment and parity on behaviour were analysed with mixed models. Before calving, cows with a short DP were fed a DP ration, and moved to a dry cow group. During this time, cows with a short DP spent more time lying (13.7 vs. 12.6 h per day; P = 0.01) and feeding (240 vs. 209 min per day; P < 0.01), and stepped less (663 vs. 1130 steps per day; P < 0.01) than cows with no DP. After calving, all cows were fed the same lactation ration and were housed in the same herd. Cows with a short DP, however, had a lower feed intake (35.7 vs 39.1 kg per day; P < 0.01), and spent less time lying (10.7 vs. 11.6 h per day; P = 0.03) after calving than cows with no DP. Milk yield was negatively correlated with daily lying time (r: −0.22; P < 0.05), but was not correlated with daily feeding time. Also, less time was spent on both lying and feeding after calving than before calving. These results indicate that lying time was not constrained by feeding time. Lying time was positively correlated with energy balance (r: 0.28; P < 0.01). Compared with a short DP with associated ration and group changes, no DP reduced lying time and increased the number of steps in late gestation, and resulted in a higher feed intake and longer lying time in early lactation.
    Automatic monitoring of cow behaviour to assess the effects of variations in feeding delivery frequency
    Mattachini, Gabriele ; Riva, E. ; Pompe, J.C.A.M. ; Provolo, G. - \ 2015
    - p. 473 - 481.
    Automatic monitoring - cow behaviour - feeding
    Impact of marine debris on Antarctic fur seals Arctocephalus gazella at Cape Shirreff: diet dependent ingestion and entanglement : Preliminary results
    Bravo Rebolledo, Elisa ; Franeker, J.A. van - \ 2015
    Den Helder : IMARES - 7
    seals - plastics - ingestion - animal welfare - microplastics - water pollution - animal health - feeding - zeehonden - kunststoffen - inname - dierenwelzijn - microplastics - waterverontreiniging - diergezondheid - voedering
    For several decades it has been known that plastics in the marine environment can harm marine organisms, most visibly birds, turtles and mammals (Shomura and Yoshida, 1985). These animals can become entangled in this synthetic debris and can ingest macro- and micro-plastics. Recently, increased awareness of plastic fragmentation into small persistent particles (‘plastic soup’) and the potential chemical hazards from ingestion have heightened the concern regarding the chemical impact on the marine food chains and ultimately the consequences for humans as end consumers (UNEP, 2011). UNEP listed plastic debris in the oceans as one of the three main emerging issues of concern for the global environment. Within the framework of the Commission for the Convention of Antarctic Marine Living Resources (CCAMLR) there has been attention to beached litter and seal entanglements, but little systematic work on the ingestion of plastic materials has been done.
    Olfaction: An Overlooked Sensory Modality in Applied Ethology and Animal Welfare
    Nielsen, B.L. ; Jezierski, T. ; Bolhuis, J.E. ; Amo, L. ; Rosell, F. ; Oostindjer, M. ; Christensen, J.W. ; Mckeegan, D. ; Wells, D.L. ; Hepper, P. - \ 2015
    Frontiers in Veterinary Science 2 (2015)69. - ISSN 2297-1769
    odors - chemoreception - behavior - feeding - stress - housing - reproduction - disease
    Microalgae diets for landbased aquaculture of the cockle Cerastoderma edule: impacts of dietary fatty acids on growth
    Reis Batista, I.C. dos - \ 2015
    Wageningen University. Promotor(en): Aad Smaal, co-promotor(en): Johan Kamermans; R.H. Wijffels. - Wageningen : Wageningen University - ISBN 9789462575875 - 132
    schaaldieren - schaal- en schelpdierenteelt - algen - voedering - voersamenstelling - diëten - vetzuren - groei - tanks - plassen - aquacultuur - shellfish - shellfish culture - algae - feeding - feed formulation - diets - fatty acids - growth - tanks - ponds - aquaculture

    Land-based shellfish culture as a part of a multi-trophic aquaculture systems has yet to be implemented in Europe. Recently the pilot project Zeeuwse Tong (The Netherlands) evaluated the feasibility of a system of fish (Dover sole), ragworms, phytoplankton and bivalves. This thesis focused on the dietary fatty acids impact on growth, survival and fatty acid composition of juveniles (shell length >5mm) of the common cockle Cerastoderma edule, for land-based culture.

    Dietary fatty acids were chosen as the main nutritional research subject given the existing literature indicating their importance for reproduction, and growth and survival of larvae, post-larvae, spat and seed of most bivalves. However, since grow-out of juvenile cockles in land-based aquaculture is not common, no information is available on the dietary fatty acid requirements of juveniles. To determine if the presence of specific fatty acids is more important for growth and survival of juvenile cockles than the total amount of dietary fatty acids supplied, least cost linear programming was used to design live microalgae diets. Monocultures of indigenous algae were grown under controlled conditions and sampled to determine their quality in terms of dry weight, organic matter, lipid and fatty acids composition. These differences in biochemical composition of the microalgae were used in a least-cost programming software, and allowed the formulation of three diets with different fatty acid contents, but similar dry weight, organic matter, lipid and total fatty acid content. The formulated diets were then used to determine the importance of dietary fatty acids for growth, survival and fatty acid composition of juvenile cockles (Cerastoderma edule). Juvenile cockles (6.24±0.04 mm) were constantly fed live microalgal diets with similar lipid, organic matter and total fatty acid contents but different individual fatty acid concentrations: high-EPA, no-DHA and low-ARA diets. Growth was positively affected by high-EPA and low-ARA diets, whereas no significant growth was observed for the no-DHA diet. However, high mortality of cockles fed no-DHA diet and the low absorption efficiency and clearance rate of this diet indicate that this diet is unsuitable for juvenile cockles. In balanced diets with EPA and DHA, lower concentrations of ARA did not limit growth. The combination of EPA and DHA in a live microalgae diet was beneficial for the growth and survival of juvenile cockles, but no conclusion on the importance of supplying only EPA could be made. To address this, an additional growth experiment was designed. Growth and fatty acid profiles of juveniles cockles were determined after 28 days of feeding diets:1) with EPA 2) with DHA; 3) with EPA and DHA from a mixture of a diatom with a green algae; 4) with EPA and DHA from a mixture of the two green algae and 5) without long-chain (>C20) fatty acids. Significantly higher growth rate was observed with the treatment rich in EPA, while the lowest growth rates were found in without EPA. These results indicate that EPA is necessary for the short-term growth of cockles. Moreover, the fatty acid profile of the polar lipids confirmed that, like most marine invertebrates, juvenile C. edule are not able to biosynthesize EPA and DHA from 18:3n-3 but are capable of biosynthesizing diene and triene NMI fatty acids. The occurrence of the NMI fatty acids was diet related, thus refuting the possibility of production of NMI as replacement for EPA and DHA.

    Furthermore, in order to develop land-based culture of cockles it is crucial to have a supply of high quality live microalgal diets produced with minimum effort. Therefore, the use of simplified microalgae media, with different nitrogen sources (nitrate or ammonium) and molar N:P ratio, phosphorus, silica, iron, manganese and vitamins were also investigated. Chaetoceros muelleri, a marine diatom that was chosen given its robustness and quality as food for juvenile cockles, reacted positively to all simplified media. At the exponential phase, all cultures had reached similar cellular concentrations and dry weight productions. Cultures grown on ammonium media had a longer cultivation period, 20 days. Considering dry-weight production, culture duration, nutrient efficiency and lipid composition, the simplified media containing ammonium, phosphorus, silica, iron, manganese and vitamins proved to be a viable choice for batch culture of C. muelleri. The choice between these two media depends on the final purpose of the microalgae cultures and whether lipid contents (NH49:1), dry weight biomass (NH425:1) or nitrogen input and output (NH49:1) are more important.

    In this thesis it was demonstrated that mono-algal diets with high EPA, as well as mixed live microalgae diets with high EPA and DHA contents proved to be suitable diets for C. edule juveniles. In addition, a positive relation between growth and the amount fed was found. The growth rates of the cultured cockles in this thesis are in accordance with the rates observed under natural conditions. The use of the simplified microalgae culture medium tested represents a significant decrease in the cost and preparation of the medium, as well as longer production and harvest periods, while maintaining microalgae quality. These results indicate that land-based aquaculture of cockles and microalgae is therefore a promising venture, with potential for expansion.

    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.
    Effects of hatching time and hatching system on broiler chick development
    Ven, L.J.F. van de - \ 2012
    Wageningen University. Promotor(en): Bas Kemp; Peter Groot Koerkamp, co-promotor(en): Henry van den Brand; A.V. van Wagenberg. - S.l. : s.n. - ISBN 9789461734471 - 173
    vleeskuikens - kuikens - kunstmatig bebroeden - broedmachines - postnatale ontwikkeling - broedfactoren - broedinstallaties - dierfysiologie - groei - voedering - pluimveehouderij - broilers - chicks - artificial hatching - brooders - postnatal development - hatching factors - hatcheries - animal physiology - growth - feeding - poultry farming

    Key words: hatching time, hatching system, chick physiology, broiler growth, chick quality.

    Chicks hatch over a time window of 24-36 hours and are only removed from the hatcher when the majority of the chicks have hatched. Especially for the early hatching chicks this leads to delays in the first feed and water access and consequently negative effects on chick development. In an alternative hatching system, named Patio, the hatching and brooding phase are combined, thereby enabling direct posthatch feed and water access. Environmental conditions in Patio differ from those in hatchers, which may further influence chick quality, physiology, and growth. Chicks hatching at different moments may respond differently to these different conditions in both hatching systems. In this thesis, the first aim was to determine effects of hatching in the Patio system on hatchability, chick quality, and growth. The second aim was to determine the physiological status of chicks of different hatching moments, in the hatcher and the Patio system, at hatch, and at chick collection (21.5 d of incubation). Effects of hatching time and moment of first feed and water access on posthatch growth were also included.

    Hatchability of fertile eggs was 1.03% higher in the Patio system compared to the hatcher, which was probably due to different climate conditions during the hatching phase. At hatching, chick physiology was not clearly affected by hatching system, but effects of moment of hatching in the hatch window were clear: longer incubation times led to increased organ weights and decreased yolk weights, suggesting a higher level of maturation in late hatching chicks. At the moment of chick collection, Patio chicks, having immediate feed and water access,showed larger body and organ weights, higher hepatic glycogen reserves, higher plasma glucose and T3 levels, and lower corticosterone levels compared to hatcher chicks which were fasted between hatching and chick collection. Usinga chick qualitative score based on physical traits and the incidence of second grade chicks, chick quality was lower in Patio than in hatcher chicks. However the quality scores used were not predictive for posthatch performance. Patio chicks showed improved posthatch growth compared to hatcher chicks, which was not related to different climate conditions during hatching, but to earlier feed and water access. Apart from higher growth from d0-7 in early and midterm vs late hatching chicks, effects of hatching time on growth were not clear from this thesis.

    In conclusion, despite considerable differences in climate and other environmental factors, effects of hatching system on physiology of broiler chickens at hatch and growth performance up to slaughter age are limited. Perinatal chick physiology is affected by the moment of hatching in the hatch window, and by posthatch conditions in the hatching system, especially early feed and water access.

    Effect van exploratievoedering en hokbezetting op het welzijn van vleesvarkens = Effect of exploration feeding and space on welfare of growing finishing pigs
    Vermeer, H.M. ; Dirx-Kuijken, N.C.P.M.M. ; Wisman, J.H. ; Bikker, A.M. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 546) - 18
    dierenwelzijn - varkenshouderij - varkens - vleesproductie - staartbijten - varkensvoeding - voedering - dosering - veebezetting - diergedrag - diergezondheid - animal welfare - pig farming - pigs - meat production - tail biting - pig feeding - feeding - dosage - stocking rate - animal behaviour - animal health
    To improve welfare of growing-finishing pigs the effect of exploration feeding and space allowance were tested and resulted in less skin.
    Kansen op de mestmarkt door mestscheiding en voeraanpassingen
    Hoop, D.W. de; Lakner, D. ; Cooten, W.C. van; Hoop, J.G. de; Bikker, A.M. ; Prins, H. ; Gebrezgabher, S.A. ; Meuwissen, M.P.M. - \ 2011
    Den Haag : LEI, onderdeel van Wageningen UR (Rapport / LEI : Onderzoeksveld Sector en ondernemerschap ) - ISBN 9789086154760 - 54
    dierlijke meststoffen - mestverwerking - scheiding - innovaties - markten - voedering - normen - aanpassing - animal manures - manure treatment - separation - innovations - markets - feeding - standards - adjustment
    Deze studie is gericht op de kansen voor verlichting van de toekomstige mestmarkt door mestscheiding en voeraanpassingen. Dit wordt geplaatst in de context van de toekomstige aanscherping van de normen voor het gebruik van mest. Een plan van aanpak geeft aanbevelingen om deze kansen te benutten.
    Verduurzaming van de zuivelketen via het krachtvoerspoor
    Beldman, A.C.G. ; Doorneweert, R.B. ; Dolman, M.A. ; Bergevoet, R.H.M. - \ 2010
    Den Haag : LEI Wageningen UR (Rapport / LEI : Onderzoeksveld Sector & ondernemerschap ) - ISBN 9789086154074 - 97
    diervoeding - diervoedering - voedering - energie - duurzame energie - animal nutrition - animal feeding - feeding - energy - sustainable energy
    Onderzoek naar de vraag in welke mate (de productie van) krachtvoer kan bijdragen aan verduurzaming verbetering van de efficïentie van energie. Er zijn mogelijkheden: ze zijn echter nogal complex en overstijgen het belang van de individuele agrariër of voerproducent
    Steeds meer inzicht in de celwand. Oogsttijdstip, groeiomstandigheden en ras bepalen celwandverteerbaarheid maïs
    Cone, J.W. - \ 2009
    Veeteelt 26 (2009)3. - ISSN 0168-7565 - p. 12 - 14.
    melkveehouderij - zea mays - plantenveredeling - voedering - celwanden - verteerbaarheid - dairy farming - zea mays - plant breeding - feeding - cell walls - digestibility
    Na jaren van veredeling op het kolfaandeel in de maisplant krijgt nu ook de celwandverteerbaarheid van de restplant meer aandacht. Waarom is de ene celwand wel verteerbaar en de andere niet? Onderzoek door ASG en Wageningen UR moet nieuwe inzichten geven voor verdere veredeling
    Het dieet van de Steenloper Arenaria interpres: een literatuuroverzicht
    Cremer, J.S.M. ; Smit, C.J. - \ 2009
    Texel : IMARES (Rapport / IMARES Wageningen UR C141/09) - 28
    arenaria (vogels) - scolopacidae - voedering - diëten - voedingsgedrag - nederland - voedingsecologie - waddenzee - westerschelde - arenaria (birds) - scolopacidae - feeding - diets - feeding behaviour - netherlands - feeding ecology - wadden sea - western scheldt
    Voeding biologische melkschapen : praktijkevaluatie voedernormen
    Verkaik, J.C. ; Hindle, V.A. ; Middelkoop, J.A. van; Riel, J.W. van; Sebek, L.B.J. - \ 2009
    Lelystad : Animal Sciences Group, Wageningen UR (Rapport / Animal Sciences Group 208) - 38
    schapenhouderij - biologische landbouw - melkveebedrijven - voedering - eiwitbehoefte - melkproductie - evaluatie - schapen - dynamisch modelleren - sheep farming - organic farming - dairy farms - feeding - protein requirement - milk production - evaluation - sheep - dynamic modeling
    On-farm assessment indicates that present feeding standards for dairy sheep lead to overestimation in protein requirement. The proposed lowering of the (protein) standards can be justified on both nutritional and economical grounds. The proposed lowering in feed protein allowance will lead to efficient protein use without reducing milk yield. An overestimation of 0.5 kg milk results in 15 to 25% over feeding. Improvements in roughage quality are essential to compliance with organic feed standards restricting concentrate inclusion to 40% of the ration. Economic optimalization of dairy sheep nutrition is possible using Dynamic Linear Modelling (DLM)
    Duurzaamheid diervoeding: feed vs food or fuel
    Gosselink, J.M.J. - \ 2008
    veevoeder - veevoeding - voer - diervoeding - voedering - bio-energie - biobased economy - voedsel versus brandstof - duurzaamheid (sustainability) - fodder - livestock feeding - feeds - animal nutrition - feeding - bioenergy - biobased economy - food vs fuel - sustainability
    Biomassaproductie ten behoeve van diervoeding (Feed) komt ook in het spanningsveld van de biobased economy terecht. Feed concurreert om biomassa met andere doelen, m.n. voedsel (Food) en bio-energie (Fuel). De concurrentie speelt zich af op basis van biomassa als grondstof alsook het landgebruik. Deze concurrentie zal voorlopig blijven bestaan ondanks dat er nog veel winst is te behalen om in de wereld de biomassaproductie te verhogen
    Eiwitnotering vers gras onderzocht; DVE lager en PEB hoger
    Klop, A. ; Brandsma, G.G. - \ 2008
    V-focus 5 (2008)2. - ISSN 1574-1575 - p. 14 - 15.
    rundveehouderij - weiden - begrazing - voedering - grassen - eiwitwaarde - voedingswaarde - waardesystemen - cattle husbandry - pastures - grazing - feeding - grasses - protein value - nutritive value - value systems
    In dit artikel meer over de eiwitwaarde van vers gras, die in het DVE/OEB-2007 systeem een andere waardering krijgt
    Dynamisch melken en voeren levert geld op
    Ouweltjes, W. ; Andre, G. ; Zom, R.L.G. ; Bleumer, E.J.B. - \ 2008
    V-focus 5 (2008)april (2). - ISSN 1574-1575 - p. 22 - 23, 25.
    melkveehouderij - melken - voedering - krachtvoeding - automatisering - melkstandinrichtingen - robots - lineaire modellen - dynamische modellen - bedrijfsresultaten in de landbouw - dairy farming - milking - feeding - force feeding - automation - milking parlours - robots - linear models - dynamic models - farm results
    Op het High-techbedrijf van de Waiboerhoeve is in 2006 een prototype voor een dynamisch lineair adviessysteem voor melken en voeren ontwikkeld en getoetst. De resultaten geven aan dat met deze benadering een aanzienlijk beter saldo behaald kan worden dan met traditionele adviezen
    AMS groep maakt keuze voor toekomst: weiden of opstallen? [Koe & Wij]
    Animal Sciences Group (ASG), - \ 2007
    melkveehouderij - melkkoeien - weiden - begrazing - voedering - agrarische bedrijfsvoering - melkveebedrijven - dairy farming - dairy cows - pastures - grazing - feeding - farm management - dairy farms
    De laatste bijeenkomst van de praktijkgroep AMS stond onder andere in het teken van de afweging weiden of opstallen. In tweetallen werd gespard over de motieven voor weidegang, de toekomst van het bedrijf en de afweging voor opstallen of weidegang in de nabije toekomst. Op basis van de aspecten economie, arbeid, maatschappelijke en persoonlijke waarden hebben de AMS deelnemers hun (voorlopige) keuze gemaakt en het zogenoemde afwegingspaspoort ingevuld
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