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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    Teelthandleiding zetmeelaardappelen: standdichtheid
    Veerman, A. - \ 2003
    Kennisakker.nl 2003 (2003)15 dec..
    aardappelen - aanslaan van het gewasbestand - opstandsdichtheid - stengels - vegetatieve vermeerdering - uitstoeling - pootknollen - gewaskwaliteit - gewasopbrengst - fabrieksaardappelen - akkerbouw - teelthandleidingen - potatoes - stand establishment - stand density - stems - vegetative propagation - tillering - seed tubers - crop quality - crop yield - starch potatoes - arable farming - cultivation manuals
    De standdichtheid van een gewas kan beter worden uitgedrukt in het aantal hoofdstengels dan in het aantal planten per m2. Het maakt immers nogal wat uit of de planten gemiddeld zes of slechts drie hoofdstengels hebben. Hoofdstengels zijn stengels die knollen dragen. Daarnaast kunnen we soms boven- en ondergrondse zijstengels onderscheiden. De standdichtheid van een gewas is in tweeërlei opzicht belangrijk. Ze is medebepalend voor zowel de opbrengst als de knolkwaliteit, in het bijzonder van de knolgrootte.
    In voor- of najaar verplanten? Een proef met gewone esdoorn
    Schuring, W. ; Das, C. - \ 1998
    Nederlands Bosbouwtijdschrift 70 (1998)2. - ISSN 0028-2057 - p. 66 - 69.
    bosbouw - beplanten - aanslaan van het gewasbestand - seizoenen - houtteelt - bosbouwkundige handelingen - groei - milieufactoren - forestry - planting - stand establishment - seasons - silviculture - forestry practices - growth - environmental factors
    Integration of agroforestry and reforestation for sustainable land use in small farm systems of Sarapiqui, Costa Rica : 8th international course on local level management of trees and forests for sustainable land use
    Vargas Mena, E. ; Maroto Villalobos, O.F. ; Binh Nguyen Thanh, - \ 1995
    Wageningen : IAC - 30
    bosbouw - agroforestry - beplanten - aanslaan van het gewasbestand - kleine landbouwbedrijven - landgebruik - landbouwgrond - costa rica - forestry - agroforestry - planting - stand establishment - small farms - land use - agricultural land - costa rica
    Different establishment methods of ash (Fraxinus excelsior), a trial project
    Oosterbaan, A. - \ 1994
    Wageningen : IBN-DLO (IBN research report 94/4) - 25
    bosbouw - beplanten - aanslaan van het gewasbestand - zware kleigronden - bomen - nederland - fraxinus excelsior - forestry - planting - stand establishment - clay soils - trees - netherlands - fraxinus excelsior
    Miombo trees and mycorrhizae : ecological strategies, a basis for afforestation
    Munyanziza, E. - \ 1994
    Agricultural University. Promotor(en): R.A.A. Oldeman; T.W. Kuyper. - S.l. : Munyanziza - ISBN 9789054852681 - 193
    bosbouw - mycorrhizae - boomkwekerijen - bodeminoculatie - beplanten - aanslaan van het gewasbestand - tanzania - bebossing - natuurlijke opstanden - forestry - mycorrhizas - forest nurseries - soil inoculation - planting - stand establishment - tanzania - afforestation - natural stands

    This project has covered one or several aspects of the life cycle of the main miombo tree species, namely Afzelia quanzensis ,Brachystegia microphylla, Brachystegia spiciformis ,Julbernardia globifloraand Pterocarpus angolensis . These aspects included natural and artificial regeneration, fertilization, artificial inoculation of seedlings and natural occurrence of mycorrhizae on field-grown seedlings. Mycorrhizal survey of pine seedlings in various nurseries and inoculation trials on pines with exotic and indigenous fungi had also been conducted. The ultimate goal was to contribute to the development of techniques needed for the silviculture of miombo tree species.

    Seeds of B. speciformis , J. globiflora and A. quanzensis germinated within 3 weeks in nature provided there was regular rain. Seeds of P. angolensis possessed dormancy. Providing water was not enough to induce germination. In the greenhouse a hot wire scarifier boosted their germination to more than 90% within less than two weeks. Outside rain had a clear positive influence on the germination of scarified surfacesown seeds in the greenhouse. Germination was always initiated by outside rain. All species tested were sensitive to fires. For A. quanzensis germination tests were carried out at 10, 15 and 25°C. Seedlings germinated only at 25°C. Germination failures were also encountered in the field in the cool highlands of Tanzania.

    Seedlings of the above named indigenous species were raised in the nursery or observed in the miombo woodlands. A number of facts emerged.
    A big share of carbon is allocated to the development of the taproot. In the nursery, pruning the taproot interfered with the natural survival strategy of seedlings and caused a sharp depression in seedling growth. This was observed on J. globiflora and P. angolensis . The initial growth rate of the miombo tree seedlings covered here is far higher than that achieved by pines. As observed in Morogoro on seedlings of A. quanzensis , more than 70 percent of the height achieved in one year is attained in the first 2 months. Miombo species with big seeds such as A. quanzensis , had an initial higher growth rate than small-seeded species.

    The effect of drought on A. quanzensis seedling growth and survival during early stage of growth was studied. Inoculated or non- inoculated potted nursery seedlings were irrigated once a day, once every three days or once every four days. Induced drought had a negative effect on biomass accumulation. Non-drought treated seedlings were more than 4 times as heavy than treated ones. Inoculation did not counteract the effect of drought. Inoculated, drought-treated seedlings developed only one mycorrhizal type. The mycorrhizae in this treatment were shrunk and had a very thin sheath. Infection percentage was lower than 10%. Non-drought treated inoculated seedlings developed more than one type including that in treated seedlings. Infection rate was above 50%.

    A. quanzensis seedlings were observed under natural dry circumstances in the miombo woodlands for survival and mycorrhizal development. All seedlings survived and all formed one single mycorrhizal type similar to that in seedlings watered once every 4 days. All feeder roots were infected. Survival was 100%.
    Seedlings in the miombo woodlands yearly die back during the long dry season. There was no die-back in nursery raised irrigated seedlings.

    In the nursery A. quanzensis, B. microphylla, and J. globiflora seedlings were inoculated with mycorrhizal soil and basidiospores of fungi associated with adult trees. As a result of contact with soil inoculum, seedlings of these species formed ectomycorrhizae. only basidiospores of one fungus were able to form mycorrhizae with A. quanzensis in the nursery. In the field observations were made on seedlings of B. spiciformis and A. quanzensis naturally growing or artificially grown in the rhizosphere of their mother trees or other ectomycorrhizal miombo trees. Seedlings got colonised by fungi associated with adult trees. The infection started before germination was completed.

    Specificity ofAfzeliawas studied by inoculating seedlings with inoculum from other miombo tree species. Afzelia was found to have a broad host range.
    P. angolensis seedlings were raised in the nursery in the soil from the rhizosphere of adult trees of the same species. Seedlings of P. angolensis formed arbuscular mycorrhizae and nodulated. None of the ectomycorhizal legumes treated in this study nodulated.
    In the nursery the contribution of the mycorrhizal formation to the biomass accumulation was assessed for B. microphylla. Inoculated seedlings were far taller and had higher biomass than non-inoculated ones.
    The main features of miombo ectomycorrhizae is that they have many long and thick hyphae and big rhizomorphs. Rhizomorphs as big as 150 μm diameter were recorded.

    Fertilization in the nursery was done for P. angolensis seedlings. Simultaneous application of nitrogen and phosphorus boosted the growth. Nodulation was, however, eliminated on fertilized seedlings. Iron and zinc did not have any effect. In a nearby nursery, P. angolensis seedlings had iron deficiency symptoms and were dying. Application of iron solution on leaves had a visible effect within 2 days. At the end of the experiment, iron-treated seedlings had significantly grown in height, had produced new leaves and had developed their root system. Non-treated seedlings died or lost their leaves and had their root system very much shortened. In the greenhouse the same symptoms were experimentally reproduced by growing seedlings in compacted and overwatered soil.

    Mycorrhizal status of P. patula seedlings in various nurseries was assessed in Arusha, Mafiga and Sao Hill, Tanzania. Not all nurseries had mycorrhizae. As a result of lack of mycorrhizae, seedlings in Mafiga nursery were dying. After artificial inoculation, seedlings turned green and grew significantly. The control seedlings deteriorated. Inoculated seedlings formed mycorrhizae. More mycorrhizal types were found in Sao Hill compared to the other 2 regions. Suillus granulatus and Thelephora cf. terrestris were the most common mycorrhizae. The use of earthballs in nurseries instead of pots as practised on trial basis in one nursery, was found inhibitory to mycorrhizal development. Suillus was found sensitive to this practice. Earthballs have a high clay content and are poorly aerated.

    In Morogoro inoculation trials were conducted. Seedlings were grown in the pots in the greenhouse or directly raised under adult pine trees growing within 100 m from the greenhouse. Seedlings of the greenhouse received inoculum from those same adult trees. Seedlings under adult trees formed Suillus mycorrhizae of adult trees and were associated with sporophores of this fungi while those in the nursery formed Thelephora mycorrhizae and produced Thelephora sporocarps within 5 months. Thelephora sporocarp production stopped from the 6th month onwards while Suillus sporophores production continued under adult trees during the rain seasons. Infection was earlier and higher in the field than in the nursery.

    In the nursery pine seedlings were raised in fresh soil from the root zone of B.microphylla and Julbernardia globiflora. In the field seedlings were directly raised in the root zone of these miombo trees after addition or non-addition of pine mycorrhizal soil. A similar mycorrhizal type was formed in the nursery and in the field where no pine soil was added. Where pine soil addition was made, seedlings formed Thelephora mycorrhizae earlier observed in the nursery.

    The ecological strategies of miombo trees can be summarized in the following points. (1) The strategies focus on the underground compartment. (2) They are related to the architecture and dynamics of the root system with its deep and thick taproot. While the shoot in seedlings yearly dies back due to severe dry seasons, the taproot yearly expands. (3) The architecture with thin lateral roots lends itself to mycorrhizal formation and/or nodulation. Ectomycorrhizal legumes are of a broad host range. (4) Mycorrhizal lateral roots participate efficiently in building up the taproot, thus increasing the chances of seedlings to survive in dry and unpredictable environments. (5) The ability of seedlings and trees to develop new shoots using reserves drawn from the taproot towards the end of the dry season, allows them to efficiently use limited showers (6) Recognition of these facts is a basis for a successful afforestation with miombo trees.

    This research showed indeed that good nursery practices are beneficial for seedling growth and survival in the nursery and later in the field. The following points deserve attention in nursery management. These are (1) seed treatment (for P. angolensis ); (2) nutrient and moisture requirements; (3) (ecto)mycorrhiza; (4) restricted pruning of the taproot and (5) timing of activities.

    Bosontwikkeling in de Lauwersmeer : de te verwachten gevolgen van veranderingen in de waterhuishouding voor de bosontwikkeling in het Ballastplaatbos, het Diepsterbos en het Zomerhuisbos
    Siebel, H.N. - \ 1993
    Wageningen : IBN-DLO (IBN - rapport 015) - 27
    bosbouw - landgebruik - planning - landevaluatie - regionale planning - beplanten - aanslaan van het gewasbestand - waterrelaties - wortels - bodem - polders - inundatie - nederland - lauwersmeergebied - forestry - land use - planning - land evaluation - regional planning - planting - stand establishment - water relations - roots - soil - polders - flooding - netherlands - lauwersmeergebied
    Vooronderzoek naar de kosten van aanleg en onderhoud van bosplantsoen in het stedelijk gebied
    Rotteveel, K. - \ 1988
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" nr. 513) - 55
    bosbouw - bosbouwkundige handelingen - kosten - rentabiliteit - verzorgen van jonge opstanden - plantmateriaal - bosbomen - bosbouw in steden - beplanten - aanslaan van het gewasbestand - groene zones - openbare parken - recreatiegebieden - publieke tuinen - bosopstanden - forestry - forestry practices - costs - profitability - tending - planting stock - forest trees - urban forestry - planting - stand establishment - green belts - public parks - amenity and recreation areas - public gardens - forest stands
    Bosaanleg in Nederland, anno 1985.
    Heij, W. - \ 1988
    Nederlands Bosbouwtijdschrift 60 (1988)11. - ISSN 0028-2057 - p. 371 - 376.
    bosbouw - landontginning - nederland - beplanten - grondvoorbereiding - aanslaan van het gewasbestand - forestry - land clearance - netherlands - planting - site preparation - stand establishment
    Verslag van zaaiproeven met zomereik op voormalige landbouwgrond
    Oosterbaan, A. - \ 1987
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" nr. 469) - 28
    bosbouw - bomen - direct zaaien - aanslaan van het gewasbestand - chemische bestrijding - pesticiden - quercus robur - forestry - trees - direct sowing - stand establishment - chemical control - pesticides - quercus robur
    Bos als tussenfase bij heide ontginningen : hoe, waar, wanneer en waarom
    Pijls, H. - \ 1986
    Wageningen : STIBOKA - 52
    bosbouw - heidegebieden - nederland - beplanten - ontginning - aanslaan van het gewasbestand - steppen - forestry - heathlands - netherlands - planting - reclamation - stand establishment - steppes
    Onderzoek naar de mogelijkheden voor houtproduktie op braakliggende terreinen in het stedelijk gebied : een case-study in Leusden
    Leek, N.A. ; Kuijk, M.M.A. van; Schoenfeld, P.H. - \ 1985
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" no. 398) - 43
    bosbouw - weiden - bossen - landbouwgrond - relaties - ontbossing - bebossing - woeste grond - landgebruik - bosbouweconomie - kosten - theorie - berekening - rentabiliteit - groene zones - heggen - beplanten - aanslaan van het gewasbestand - geografie - steden - stedelijke gebieden - nederland - gemeenten - utrecht - forestry - pastures - forests - agricultural land - relationships - deforestation - afforestation - waste land - land use - forest economics - costs - theory - calculation - profitability - green belts - hedges - planting - stand establishment - geography - towns - urban areas - netherlands - municipalities - utrecht
    Bodemkundig onderzoek voor bosaanleg te Hellevoetsluis : bodemgesteldheid, bodemgeschiktheid voor boomsoorten en beoordeling voor te verwachten boom- en struikgemeenschappen
    Mulder, J.R. - \ 1985
    Wageningen : STIBOKA (Rapport / Stichting voor Bodemkartering no. 1847) - 46
    bosbouw - grondvermogen - landevaluatie - kaarten - beplanten - bodemgeschiktheid - bodemkarteringen - aanslaan van het gewasbestand - nederland - zuid-holland - zuidhollandse eilanden - forestry - land capability - land evaluation - maps - planting - soil suitability - soil surveys - stand establishment - netherlands - zuid-holland - zuidhollandse eilanden
    Groei en ontwikkeling van een beplanting van Populus 'Zeeland' op brak havenslib bij verschillende aanlegmethoden = Growth and development of a plantation of Populus 'Zeeland' on brackish harbour sludge at various methods of establishment.
    Burg, J. van den; Kolster, H.W. - \ 1982
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor onderzoek in de bos- en landschapsbouw "De Dorschkamp" no. 324) - 44
    bosbouw - bomen - bebossing - havens - bagger - stort - sediment - modder - beplanten - aanslaan van het gewasbestand - bosschade - beschadigingen - bodemeigenschappen - erosie - ploegen als grondbewerking - grondbewerking - baggerspeciedepots - industrieterreinen - mijnstort - waterrelaties - voedingsstoffen - wortels - bodemchemie - houtteelt - bosbouwkundige handelingen - groei - milieufactoren - bosopstanden - bemesting - forestry - trees - afforestation - harbours - dredgings - spoil - sediment - mud - planting - stand establishment - forest damage - injuries - soil properties - erosion - ploughing - tillage - spoil banks - industrial sites - mine spoil - water relations - nutrients - roots - soil chemistry - silviculture - forestry practices - growth - environmental factors - forest stands - fertilizer application
    Aanleg- en onderhoudskosten van beplantingen in het recreatiegebied Zuigerplaspark
    Grimberg, G. ; Schaap, L. - \ 1982
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" no. 295) - 51
    bosbouw - bosbouwkundige handelingen - kosten - rentabiliteit - beplanten - aanslaan van het gewasbestand - verzorgen van jonge opstanden - nederland - bosopstanden - flevoland - forestry - forestry practices - costs - profitability - planting - stand establishment - tending - netherlands - forest stands - flevoland
    Beplantingen op vuilstortterreinen
    Peeters, J.P. - \ 1981
    Wageningen : De Dorschkamp (Mededeling / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" nr. 188)
    bosbouw - baggerspeciedepots - industrieterreinen - mijnstort - bebossing - beplanten - aanslaan van het gewasbestand - forestry - spoil banks - industrial sites - mine spoil - afforestation - planting - stand establishment
    De invloed van gras- en kruidenvegetaties op de slaging en groei van eikenbezaaiingen op voormalige landbouwgronden = The influence of vegetation on survival and growth of oak seedings on former arable land
    Oosterbaan, A. ; Tol, G. van - \ 1981
    Wageningen : "De Dorschkamp" (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" no. 268) - 20
    bosbouw - bomen - direct zaaien - aanslaan van het gewasbestand - onkruiden - houtteelt - bosbouwkundige handelingen - groei - milieufactoren - nederland - ecologie - forestry - trees - direct sowing - stand establishment - weeds - silviculture - forestry practices - growth - environmental factors - netherlands - ecology
    Aanleg- en onderhoudskosten van beplantingen in het recreatiegebied Rottemeren
    Leek, N.A. - \ 1980
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" no. 231) - 38
    bosbouw - bosbouwkundige handelingen - kosten - rentabiliteit - beplanten - aanslaan van het gewasbestand - verjonging - verzorgen van jonge opstanden - bosplantages - groene zones - openbare parken - recreatiegebieden - publieke tuinen - economie - gebruikswaarde - economische impact - nederland - zuid-holland - forestry - forestry practices - costs - profitability - planting - stand establishment - regeneration - tending - forest plantations - green belts - public parks - amenity and recreation areas - public gardens - economics - use value - economic impact - netherlands - zuid-holland
    Een landelijke inventarisatie van de methoden van herbebossing, toegepast in het bosjaar 1976 - 1977
    Bosman, J.A. - \ 1979
    Wageningen : De Dorschkamp - 105
    bosbouw - beplanten - aanslaan van het gewasbestand - nederland - forestry - planting - stand establishment - netherlands
    Bezaaiing en natuurlijke verjonging van Quercus robur en Quercus petraea
    Anonymous, - \ 1979
    Wageningen : Pudoc (Literatuurlijst / Centrum voor landbouwpublicaties en landbouwdocumentatie no. 4263)
    bibliografieën - direct zaaien - bosbouw - natuurlijke verjonging - aanslaan van het gewasbestand - bomen - quercus robur - quercus petraea - bibliographies - direct sowing - forestry - natural regeneration - stand establishment - trees - quercus robur - quercus petraea
    Opzet van een inventarisatie naar herbeplantingsmethodieken in de provincie Gelderland in het bosjaar 1976/1977
    Ginkel, R.E. van - \ 1978
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor onderzoek in de bos- en landschapsbouw "De Dorschkamp" no. 155) - 30
    bosbouw - beplanten - aanslaan van het gewasbestand - nederland - gelderland - forestry - planting - stand establishment - netherlands - gelderland
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