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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Amazing grazing: A public and private partnership to stimulate grazing practices in intensive dairy systems
Schils, René ; Philipsen, Bert ; Hoekstra, Nyncke ; Holshof, Gertjan ; Zom, Ronald ; Hoving, Idse ; Reenen, Kees van; Stienezen, Marcia ; Klootwijk, Cindy ; Werf, Joop van der; Sebek, Léon ; Eekeren, Nick van; Dixhoorn, Ingrid van; Pol-van Dasselaar, Agnes van den - \ 2019
Sustainability 11 (2019)20. - ISSN 2071-1050
Agricultural innovation system - Dairy sector - Grassland - Interdisciplinary research - Stakeholders

In many intensive dairy regions in northwest Europe, a decline in grazing is observed. In the Netherlands, the proportion of dairy cows with access to pasture is declining, as well as the time spent grazing per cow. The decline in grazing is seen as an unwanted trend by many stakeholders and is, thus, under debate amongst dairy farmers, the dairy chain, and society. Therefore, a public-private partnership was initiated to encourage grazing by providing farmers with usable means of improving their grazing systems. The partnership involved stakeholders from the dairy farming community, dairy and feed industry, agrotechnical industries, advisory services, and research. The objective of this partnership was to develop and stimulate technological innovations and management measures that increase fresh grass intake at pasture. The innovation network combined an integrated research approach with farmer working groups and broader stakeholder interactive meetings. The project started with a comprehensive grass intake framework, which was the foundation for exploration of innovations. The framework consisted of six interlinked components: soil, grass growth, grass supply, grass intake, feed supplementation, and cow behavior. In a continuous interactive cycle, strategic choices were made to focus on potentially effective innovations. The use of a public-private partnership to develop usable innovations that encourage grazing practices proven to be a good approach to develop a shared vision among stakeholders. It provided a basis to work together toward innovative practices and to disseminate the outcomes to the foreseen users. The approach succeeded in design concepts for two specific innovations, i.e., weekly grass growth predictions and daily fresh grass intake tracking. We demonstrated that meaningful grazing and fresh grass intake are possible in intensive dairy systems with high stocking rates and high levels of supplementary feeding.

Global distribution of earthworm diversity
Phillips, Helen R.P. ; Guerra, Carlos A. ; Bartz, Marie L.C. ; Briones, Maria J.I. ; Brown, George ; Crowther, Thomas W. ; Ferlian, Olga ; Gongalsky, Konstantin B. ; Hoogen, Johan Van Den; Krebs, Julia ; Orgiazzi, Alberto ; Routh, Devin ; Schwarz, Benjamin ; Bach, Elizabeth M. ; Bennett, Joanne ; Brose, Ulrich ; Decaëns, Thibaud ; König-Ries, Birgitta ; Loreau, Michel ; Mathieu, Jérôme ; Mulder, Christian ; Putten, Wim H. Van Der; Ramirez, Kelly S. ; Rillig, Matthias C. ; Russell, David ; Rutgers, Michiel ; Thakur, Madhav P. ; Vries, Franciska T. De; Wall, Diana H. ; Wardle, David A. ; Arai, Miwa ; Ayuke, Fredrick O. ; Baker, Geoff H. ; Beauséjour, Robin ; Bedano, José C. ; Birkhofer, Klaus ; Blanchart, Eric ; Blossey, Bernd ; Bolger, Thomas ; Bradley, Robert L. ; Callaham, Mac A. ; Capowiez, Yvan ; Caulfield, Mark E. ; Choi, Amy ; Crotty, Felicity V. ; Dávalos, Andrea ; Diaz Cosin, Darío J. ; Dominguez, Anahí ; Duhour, Andrés Esteban ; Eekeren, Nick Van; Emmerling, Christoph ; Falco, Liliana B. ; Fernández, Rosa ; Fonte, Steven J. ; Fragoso, Carlos ; Franco, André L.C. ; Fugère, Martine ; Fusilero, Abegail T. ; Gholami, Shaieste ; Gundale, Michael J. ; Gutiérrez Lopez, Monica ; Hackenberger, Davorka K. ; Hernández, Luis M. ; Hishi, Takuo ; Holdsworth, Andrew R. ; Holmstrup, Martin ; Hopfensperger, Kristine N. ; Lwanga, Esperanza Huerta ; Huhta, Veikko ; Hurisso, Tunsisa T. ; Iannone, Basil V. ; Iordache, Madalina ; Joschko, Monika ; Kaneko, Nobuhiro ; Kanianska, Radoslava ; Keith, Aidan M. ; Kelly, Courtland A. ; Kernecker, Maria L. ; Klaminder, Jonatan ; Koné, Armand W. ; Kooch, Yahya ; Kukkonen, Sanna T. ; Lalthanzara, H. ; Lammel, Daniel R. ; Lebedev, Iurii M. ; Li, Yiqing ; Jesus Lidon, Juan B. ; Lincoln, Noa K. ; Loss, Scott R. ; Marichal, Raphael ; Matula, Radim ; Moos, Jan Hendrik ; Moreno, Gerardo ; Mor n-Ríos, Alejandro ; Muys, Bart ; Neirynck, Johan ; Norgrove, Lindsey ; Novo, Marta ; Nuutinen, Visa ; Nuzzo, Victoria ; Mujeeb Rahman, P. ; Pansu, Johan ; Paudel, Shishir ; Pérès, Guénola ; Pérez-Camacho, Lorenzo ; Piñeiro, Raúl ; Ponge, Jean François ; Rashid, Muhammad Imtiaz ; Rebollo, Salvador ; Rodeiro-Iglesias, Javier ; Rodríguez, Miguel ; Roth, Alexander M. ; Rousseau, Guillaume X. ; Rozen, Anna ; Sayad, Ehsan ; Schaik, Loes Van; Scharenbroch, Bryant C. ; Schirrmann, Michael ; Schmidt, Olaf ; Schröder, Boris ; Seeber, Julia ; Shashkov, Maxim P. ; Singh, Jaswinder ; Smith, Sandy M. ; Steinwandter, Michael ; Talavera, José A. ; Trigo, Dolores ; Tsukamoto, Jiro ; Valença, Anne W. De; Vanek, Steven J. ; Virto, Iñigo ; Wackett, Adrian A. ; Warren, Matthew W. ; Wehr, Nathaniel H. ; Whalen, Joann K. ; Wironen, Michael B. ; Wolters, Volkmar ; Zenkova, Irina V. ; Zhang, Weixin ; Cameron, Erin K. ; Eisenhauer, Nico - \ 2019
Science 366 (2019)6464. - ISSN 0036-8075 - p. 480 - 485.

Soil organisms, including earthworms, are a key component of terrestrial ecosystems. However, little is known about their diversity, their distribution, and the threats affecting them. We compiled a global dataset of sampled earthworm communities from 6928 sites in 57 countries as a basis for predicting patterns in earthworm diversity, abundance, and biomass. We found that local species richness and abundance typically peaked at higher latitudes, displaying patterns opposite to those observed in aboveground organisms. However, high species dissimilarity across tropical locations may cause diversity across the entirety of the tropics to be higher than elsewhere. Climate variables were found to be more important in shaping earthworm communities than soil properties or habitat cover. These findings suggest that climate change may have serious implications for earthworm communities and for the functions they provide.

Bodemsignalen grasland: praktijkgids voor bodemmanagement op melkveebedrijven
Eekeren, Nick van; Philipsen, Bert ; Bokhorst, Jan ; Berg, Coen ter - \ 2019
Zutphen : Roodbont Publishers - ISBN 9789087402433 - 112
Combining agro-ecological functions in grass-clover mixtures
Haas, Brechtje R. de; Hoekstra, Nyncke J. ; Schoot, Jan R. van der; Visser, Eric J.W. ; Kroon, Hans de; Eekeren, Nick van - \ 2019
AIMS Agriculture and Food 4 (2019)3. - ISSN 2471-2086 - p. 547 - 567.
Agrobiodiversity - Lolium multiflorum - Lolium perenne - Regenerative agriculture - Trifolium pratense - Trifolium repens

Grass-clover mixtures show many benefits for sustainable agriculture. In the Netherlands, organic farmers often work together in a so-called partner farm concept, with the aim to close nutrient cycles on a regional level. In this system, arable farms grow one-year grass-clover leys, as fodder for a livestock farm, in exchange for, e.g., manure. This practice could also be used in the transition of conventional farms towards a more circular regenerative and nature inclusive agriculture. In the current experiment we assessed the effect of a range of grass (Lolium perenne: Lp, Lolium multiflorum: Lm) and clover (Trifolium pratense: Tp and Trifolium repens: Tr) monocultures and mixtures on both below- and aboveground parameters in light of benefits for livestock and arable farms, and biodiversity. The grass monocultures showed good weed suppression, high root density, and especially Lp had a positive effect on soil structure. Clover, on the other hand, showed high herbage dry matter yield (particularly Tp) and Nitrogen (N) yield, and Tr showed high digestibility. Moreover, clover had a positive effect on the soil mineral N, and earthworm abundance tended to be higher in the clover monocultures. When (some of) the four species were combined in grass-clover mixtures, they combined the positive effects of the species and often even outperformed the (best) monocultures. We concluded that grass-clover mixtures increased agro-ecological functions.

Inzaaien van kruiden in grasland : Kruiden: mooi voor het oog, functioneel voor vogels en koeien
Janssen, Pedro ; Hoekstra, Nyncke ; Eekeren, Nick van; Jansma, Anne ; Iepema, Goaitske ; Verhoeff, Teus - \ 2019
Ekoland (2019)1. - ISSN 0926-9142 - p. 56 - 57.
Bouwstenen beweiding
Schils, René ; Dixhoorn, Ingrid van; Eekeren, Nick van; Hoekstra, Nyncke ; Holshof, Gertjan ; Hoving, Idse ; Klootwijk, Cindy ; Philipsen, Bert ; Reenen, Kees van; Şebek, Leon ; Stienezen, Macia ; Top, Marry van den; Werf, Joop van der; Zom, Ronald - \ 2019
Netherlands : Amazing Grazing - 61
Test sorghumrassen op vier proeflocaties
Agtmaal, Maaike van; Deru, Joachim ; Eekeren, Nick van; Pannecoucque, J. - \ 2019
V-focus (2019)2. - ISSN 1574-1575 - p. 20 - 22.
Predicting soil N supply and yield parameters in peat grasslands
Deru, Joachim G.C. ; Bloem, Jaap ; Goede, Ron de; Hoekstra, Nyncke ; Keidel, Harm ; Kloen, Henk ; Nierop, Andreas ; Rutgers, Michiel ; Schouten, Ton ; Akker, Jan van den; Brussaard, Lijbert ; Eekeren, Nick van - \ 2019
Applied Soil Ecology 134 (2019). - ISSN 0929-1393 - p. 77 - 84.
Apparent N recovery - Grass yield - N mineralization - Soil biota - Soil chemical-physical quality - Soil nitrogen supply - Terric Histosols

Considerable nitrogen (N) mineralization occurs in drained peat soils in use for dairy grassland, due to aerobic decomposition of soil organic matter (SOM). N losses may be limited by matching grass N uptake with N mineralization and by adapting on-farm fertilization schemes to soil N supply (SNS) and apparent N recovery (ANR). Previous attempts to predict SNS of peat grasslands from soil parameters have been unsuccessful, partly due to high variation in SNS between sites and years. In this paper, we present field data from twenty dairy grasslands on drained peat (29–65% SOM; Terric Histosols). Grass yield parameters (e.g. SNS and ANR) were compared with a comprehensive data set of soil biotic and abiotic properties measured at the start of the growing season, and with N mineralization calculated from this data. SNS ranged between 171 and 377 kg N ha−1 (mean: 264 kg N ha−1) during the growing season. Soil N mineralization estimated by laboratory incubation and by foodweb-based production ecological calculations gave similar mean values with slightly higher coefficients of variation, but correlations with SNS were not significant. Regression analysis with soil properties showed a positive correlation between SNS and soil Ca:Mg ratio and a negative correlation between fertilized grass yield and soil C:SOM ratio. No significant models were found for ANR. Based on our data and on literature, we conclude that these parameters indicate linkages between grass yield and soil physical-hydrological properties such as soil structure and water availability. In particular, the C:SOM ratio in these soils with high organic matter content may be an indicator of water repellency, and our results suggest that grass growth was limited by drought more than by nutrient availability.

Achtergronden bij informatie in de BOOT-lijst factsheets
Verloop, Koos ; Agtmaal, Maaike van; Busink, Wim ; Eekeren, Nick van; Groenendijk, Piet ; Jansen, Stefan ; Noij, Gert-Jan ; Zanen, Marleen - \ 2018
Wageningen : Stichting Wageningen Research, Wageningen Plant Research, Business unit Agrosysteemkunde (Rapport WPR 842) - 133
Vanuit het Bestuurlijk Overleg Open Teelt en Veehouderij (BOOT) is de zogenaamde BOOT-lijst opgesteld met maatregelen die emissie naar water vanuit landbouwbedrijven verlagen. De praktijkrijpe maatregelen worden via het Deltaplan Agrarisch Waterbeheer (DAW) verder uitgerold. Factsheets over 24 van de maatregelen geven inzicht in het productievoordeel, het milieuvoordeel en de kosten en in de praktische inpasbaarheid. Dit rapport voorziet in achtergrondinformatie en onderbouwing van de factsheets en geeft aan in hoeverre er consensus is over de gepresenteerde inzichten. Bij veel maatregelen is er behoefte aan versterking van de empirische onderbouwing. Adviezen over te nemen maatregelen kunnen aan overtuigingskracht winnen als resultaten van veldonderzoek beschikbaar zijn. Een aantal maatregelen heeft betrekking op verandering van bodemaspecten (zoals het bodem organische stofgehalte) zonder dat de relatie van deze doelen met waterkwaliteit voldoende duidelijk is uitgewerkt. De effectiviteit van deze maatregelen op uiteindelijke waterkwaliteitsdoelen moet scherper in het vizier komen.
Minder ammoniakemissie uit de melkveehouderij in het veenweidegebied : 25% reductie een haalbaar doel
Verloop, Koos ; Verhoeff, Teus ; Oenema, Oenema ; Hoving, Idse ; Meerkerk, Barend ; Huijsmans, Jan ; Migchels, Gerard ; Haan, Michel de; Eekeren, Nick van - \ 2018
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1129) - 31
Veldexperimenten uitgelicht : Niet-kerende grondbewerking goed voor de bodembiodiversiteit?
Schouten, Ton ; Bloem, J. ; Goede, R.G.M. de; Eekeren, Nick van; Deru, Joachim ; Zanen, Marleen ; Sukkel, W. ; Balen, D.J.M. van; Korthals, G. ; Rutgers, Michiel - \ 2018
Bodem (2018)3. - ISSN 0925-1650 - p. 20 - 23.
En de boer hij ploegde voort. Algemeen wordt aangenomen dat ploegen
noodzakelijk is om de bodem geschikt te maken voor een optimale
gewasproductie. Maar ploegen versnelt de afbraak van organische stof
en verandert het bodemleven. In deze bijdrage worden ervaringen met
acht veldexperimenten gebruikt om effecten op biodiversiteit en gerelateerde
bodemecosysteemdiensten in te schatten. Welke lessen kunnen
we leren, en kan de landbouw ook zonder ploegen?
Woelen van verdicht grasland op een zavelgrond en een zware kleigrond : Effecten op bodemstructuur, beworteling en productiviteit
Boer, Herman de; Deru, Joachim ; Eekeren, Nick van - \ 2018
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1038) - 25
Towards resilience through systems-based plant breeding. A review
Lammerts van Bueren, Edith T. ; Struik, Paul C. ; Eekeren, Nick van; Nuijten, Edwin - \ 2018
Agronomy for Sustainable Development 38 (2018)5. - ISSN 1774-0746
Agrobiodiversity - Breeding strategies - Common good - Ecological resilience - Entrepreneurial models - Resource use efficiency - Seed systems - Social justice - Societal resilience - Sustainability

How the growing world population can feed itself is a crucial, multi-dimensional problem that goes beyond sustainable development. Crop production will be affected by many changes in its climatic, agronomic, economic, and societal contexts. Therefore, breeders are challenged to produce cultivars that strengthen both ecological and societal resilience by striving for six international sustainability targets: food security, safety and quality; food and seed sovereignty; social justice; agrobiodiversity; ecosystem services; and climate robustness. Against this background, we review the state of the art in plant breeding by distinguishing four paradigmatic orientations that currently co-exist: community-based breeding, ecosystem-based breeding, trait-based breeding, and corporate-based breeding, analyzing differences among these orientations. Our main findings are: (1) all four orientations have significant value but none alone will achieve all six sustainability targets; (2) therefore, an overarching approach is needed: “systems-based breeding,” an orientation with the potential to synergize the strengths of the ways of thinking in the current paradigmatic orientations; (3) achieving that requires specific knowledge development and integration, a multitude of suitable breeding strategies and tools, and entrepreneurship, but also a change in attitude based on corporate responsibility, circular economy and true-cost accounting, and fair and green policies. We conclude that systems-based breeding can create strong interactions between all system components. While seeds are part of the common good and the basis of agrobiodiversity, a diversity in breeding approaches, based on different entrepreneurial approaches, can also be considered part of the required agrobiodiversity. To enable systems-based breeding to play a major role in creating sustainable agriculture, a shared sense of urgency is needed to realize the required changes in breeding approaches, institutions, regulations and protocols. Based on this concept of systems-based breeding, there are opportunities for breeders to play an active role in the development of an ecologically and societally resilient, sustainable agriculture.

Sward lifting in compacted grassland : effects on soil structure, grass rooting and productivity
Boer, H.C. de; Deru, J.G.C. ; Eekeren, N. Van - \ 2018
Soil & Tillage Research 184 (2018). - ISSN 0167-1987 - p. 317 - 325.
Grassland - Soil compaction - Soil loosening - Soil structure - Sward lifting

Soil compaction can impair the productivity of permanent grassland. A way to ameliorate compaction in the topsoil (0–30 cm), without destroying the sward, is soil loosening by sward lifting. To explore the potential of this form of non-inversion tillage, we applied this treatment once, either in spring or in autumn, to a moderately compacted grassland on a sandy soil and measured the effects on soil structure, grass rooting and productivity for up to two growing seasons. We also explored whether complementary overseeding with Lolium multiflorum Lam. would extend the duration of soil loosening effects. Our results show that sward lifting improved soil structure and rooting for at least 10–12 months, but did not result in a consistent or lasting increase in herbage yield or nitrogen (N) uptake. Loosening in spring decreased herbage yield (−27%) and N uptake (−16%) in the following growth period, but these decreases were largely compensated for (herbage yield) or more than compensated for (N uptake) by increases in the next three growth periods. The increase in N uptake in the first growing season (+13 kg N ha−1) was reversed in the second season (−14 kg N ha−1). Loosening in autumn increased herbage yield (+8%) and N uptake (+15%) in the first growth period (after winter), but not in the four growth periods thereafter. Cumulative yield tended to be higher (+4%), which supports the view that soil loosening should be carried out in autumn rather than in spring. The initial positive effects of loosening on herbage yield and N uptake were explained by a temporary increased soil N mineralization; initial negative effects by mechanical damage to sward and roots. Finally, complementary overseeding did not extend the duration of soil loosening effects; apparently, new root growth from the existing sward was effective enough to stabilize these effects.

Effectief bodembeheer voor een duurzaam watersysteem stroomgebied de Raam : pilot onderzoeksprogramma Lumbricus, pijler bewuste bodem
Schipper, P.N.M. ; Massop, H. ; Kros, H. ; Eekeren, N. van; Zaanen, M. ; Groenendijk, P. ; Goor, S. van; Ros, G.H. - \ 2018
Wageningen : Wageningen Environmental Research (Wageningen Environmental Research rapport 2894) - 49
Amazing Grazing: science in support of future grass based dairy systems
Schils, R.L.M. ; Philipsen, A.P. ; Holshof, G. ; Zom, R.L.G. ; Hoving, I.E. ; Reenen, C.G. van; Werf, J.T.N. van der; Galama, P.J. ; Sebek, L.B. ; Klootwijk, C.W. ; Eekeren, N. van; Hoekstra, N.J. ; Stienezen, M.W.J. ; Pol, A. van den - \ 2018
In: Sustainable meat and milk production from grasslands. - Wageningen : Wageningen Academic Publishers (Grassland Science in Europe ) - ISBN 9781841706436 - p. 336 - 338.
The Amazing Grazing project addresses the challenges that Dutch farmers face in grazing systems with high feed supplementation and high stocking rates on available grazing area. The project consists of six interlinked components (soil, grass growth, grass supply, grass intake, supllementation and behaviour), that are arranged around two grazing and three cutting experiments, as well as three farmer consultation groups. The grazing experiment showed that fresh grass intakes of approximately 6 kg DM cow -1 d-1 are feasible in intensive grazing systems with high feed supplementation levels. Tools for grass monitoring and planning, as well as cow behaviour monitoring, are being developed to support farmer decisions.
Verandering landgebruik voor bodemkwaliteit ook winstgevend voor intensieve bedrijven­
Eekeren, N. van; Wit, J. de; Evers, A. ; Haan, M. de - \ 2018
V-focus 15 (2018)3. - ISSN 1574-1575 - p. 32 - 34.
Voor een verbetering van organische stof en bodemkwaliteit op minerale gronden is het streven naar een landgebruik van 60% blijvend grasland met 20% gras, rode en witte klaver in vruchtwisseling met mais een belangrijke stap. In V-focus december 2016 is uitgerekend dat dit voor een bedrijf met 18.000 kg melk per ha een plus oplevert van 7.000 euro op jaarbasis. De vraagt dient zich aan hoe dit uitpakt bij een hogere intensiteit. Vanuit de Carbon Valley-projecten is dit berekend.
Soil ecology and ecosystem services of dairy and semi-natural grasslands on peat
Deru, Joachim G.C. ; Bloem, Jaap ; Goede, Ron de; Keidel, Harm ; Kloen, Henk ; Rutgers, Michiel ; Akker, Jan van den; Brussaard, Lijbert ; Eekeren, Nick van - \ 2018
Applied Soil Ecology 125 (2018). - ISSN 0929-1393 - p. 26 - 34.
Biodiversity - C mineralization - Grassland - Histosols - N mineralization - Water infiltration
Peat wetlands are of major importance for ecosystem services such as carbon storage, water regulation and maintenance of biodiversity. However, peat drainage for farming leads to CO2 emission, soil subsidence and biodiversity losses. In the peat areas in the Netherlands, solutions are sought in reducing drainage, adapting farming to wetter soils, and converting productive dairy grasslands to less intensively managed semi-natural grasslands. Our objective was to compare the soil ecology and related ecosystem services of dairy and semi-natural grasslands on peat soils (Terric Histosols). Soil biotic and abiotic parameters were measured in twenty dairy and twenty semi-natural sites, with particular focus on (i) soil faunal diversity (ecosystem service "maintenance of biodiversity"), (ii) CO2 emission ("climate regulation"), (iii) water infiltration ("water regulation") and (iv) soil fertility ("grass production"). Mean soil faunal taxonomic richness per site (alpha diversity) was higher in dairy grasslands compared to semi-natural grasslands. However, the total observed number of taxa (gamma diversity) in dairy grassland was 13% lower for soil fauna and 21% lower when including plant species. Potential C mineralization rate in the topsoil - used as a proxy for CO2 emission - was not influenced by land use but was limited by drought. Additionally, potential C mineralization depended on different C sources and microbial groups in the two grassland types. Water infiltration rate differed by a factor of five between land use types (dairy > semi-natural), and correlated with soil porosity. As expected, soil fertility was higher in dairy than in semi-natural grasslands. However, potential N mineralization was similar in dairy and semi-natural grasslands and was correlated negatively with bacterial biomass apparently indicating N immobilization, and positively with bacterial growth that depended on labile C and N in soil. Our study on peat soils shows that dairy versus semi-natural grassland use influences biodiversity, climate regulation, water regulation and (potential for) grassland production. We conclude with recommendations for land management to optimize the delivery of those ecosystem services.
Red clover varieties of Mattenklee type have higher production, protein yield and persistence than Ackerklee types in grass-clover mixtures
Hoekstra, N.J. ; Deyn, G.B. De; Xu, Y. ; Prinsen, Rianne ; Eekeren, N. van - \ 2018
Grass and Forage Science 73 (2018)2. - ISSN 0142-5242 - p. 297 - 308.
Breeding - Morphology - Nutritive value - Plant traits - Trifolium pratense L.

Dairy farmers have increased interest in multiyear red clover-ryegrass ley pasture swards because of their high productivity and protein concentration but the adoption of such mixtures has been restricted because of poor persistency of many red clover cultivars currently used. We aimed (i) to assess dry-matter yield (DMY), persistence and nutritive value of four Mattenklee and four Ackerklee cultivars and (ii) to investigate the underlying plant morphological traits. We conducted a 4-year field experiment with red clover-ryegrass mixtures, in combination with a short-term pot experiment in which the red clover cultivars were grown both in monoculture and in mixture with Lolium perenne L. In the field, Mattenklees showed higher production (on average 42% higher) and clover content (on average 34% higher) in the third and fourth year of production compared to Ackerklees. In the fourth year, Mattenklees had slightly lower digestibility and lower protein concentration compared to Ackerklees cultivars; however, the digestible DMY and the protein yield were higher for Mattenklees. Both persistence and nutritive value of the different red clover cultivars were closely correlated with plant morphological traits. For stem length, there was close correlation (r > .77) between the results from the pot experiment and the field experiment, suggesting that stem length may be an important trait for plant breeding.

Natte teelten: plant- en zaaimethoden van lisdodde
Geurts, Jeroen ; Vroom, Renske ; Pijlman, Jeroen ; Bestman, Monique ; Eekeren, Nick van; Houwelingen, K.M. van; Lenssinck, F.A.J. - \ 2017
V-focus (2017)6. - ISSN 1574-1575 - p. 24 - 26.
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