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Auteur Nigel Boatman |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheField margins : integrating agriculture and conservation / Nigel Boatman (1994)
Titre : Field margins : integrating agriculture and conservation Type de document : Imprimé Auteurs : Nigel Boatman, Directeur de publication ; Nigel Boatman ; British crop protection council ; British crop protection council Editeur : Farnham : British Crop Protection Council Année de publication : 1994 Collection : Monograph - British Crop Protection Council, ISSN 0306-3941 num. 58 Importance : 404 p. ISBN/ISSN/EAN : 978-0-948404-75-7 Note générale : Proceedings of a symposium organised by the british crop protection council in association with the british ecological society and the association of applied biologists and held at the University of Warwick, Coventry on 18-20 April 1994. Langues : Anglais (eng) Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149033 Boatman, Nigel, Boatman, Nigel, British crop protection council , 1994. Field margins : integrating agriculture and conservation. British Crop Protection Council, Farnham. 404 pp.
Titre : The ecology and conservation of rare arable weed species and communities Type de document : Électronique Auteurs : Philip Wilson (1958-) ; Nigel Boatman, Directeur de thèse ; Peter John Edwards (1948-), Directeur de thèse Editeur : University of Southampton Année de publication : 1990 Importance : 385 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Messicole Résumé : Since 1940, considerable changes have occurred in both arable farming practices and arable weed floras in Britain. The aim of this project was to investigate the ecology of a range of annual weed species in relation to farming practices, in order to suggest some reasons for the decline in frequency of some species, and to propose some methods by which populations may be conserved. A survey of the sites at which eight uncommon species are still found, demonstrated the strong association of the weed communities and the presence of individual species, with the cropping history and soil characteristics of fields. Climatic factors and the long-term histories of sites were also found to be important. Another survey demonstrated the tendency for the seed-banks of most weed species to be greatest at the extreme edge of fields. Four herbicides were tested against ten weed species, and the effects of levels of nitrogen application on 18 weed species were investigated. It is believed that herbicide use and the high levels of nitrogen applied to modern crop varieties have favoured their growth at the expense of weeds. The type of crop sown and the date of sowing also had a great influence on the development of the weed flora. Some species rely on a post-harvest stubble in order to set seed. Changes in arable weed communities and the status of rare species is thought to be a result of changes in the farming practices described above in addition to others not investigated. Management guidelines based on the experimental investigations are proposed. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149187 Wilson, Philip (1958-) , 1990. The ecology and conservation of rare arable weed species and communities. University of Southampton, [S.l.]. 385 pp.Documents numériques
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Thèse (1990)Adobe Acrobat PDFThe role of weeds in supporting biological diversity within crop fields / Edward Jon Marshall (2003)
Titre : The role of weeds in supporting biological diversity within crop fields Type de document : Tiré à part de revue Auteurs : Edward Jon Marshall (1952-) ; Valerie K. Brown ; Nigel Boatman ; P. J. W. Lutman ; Geoffrey R. Squire ; L. K. Ward Année de publication : 2003 Importance : 77-89 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Messicole Résumé : Weeds are major constraints on crop production, yet as part of the primary producers within farming systems, they may be important components of the agroecosystem. Using published literature, the role of weeds in arable systems for other above-ground trophic levels are examined. In the UK, there is evidence that weed flora have changed over the past century, with some species declining in abundance, whereas others have increased. There is also some evidence for a decline in the size of arable weed seedbanks. Some of these changes reflect improved agricultural efficiency, changes to more winter-sown crops in arable rotations and the use of more broad-spectrum herbicide combinations. Interrogation of a database of records of phytophagous insects associated with plant species in the UK reveals that many arable weed species support a high diversity of insect species. Reductions in abundances of host plants may affect associated insects and other taxa. A number of insect groups and farmland birds have shown marked population declines over the past 30 years. Correlational studies indicate that many of these declines are associated with changes in agricultural practices. Certainly reductions in food availability in winter and for nestling birds in spring are implicated in the declines of several bird species, notably the grey partridge, Perdix perdix. Thus weeds have a role within agroecosystems in supporting biodiversity more generally. An understanding of weed competitivity and the importance of weeds for insects and birds may allow the identification of the most important weed species. This may form the first step in balancing the needs for weed control with the requirements for biodiversity and more sustainable production methods. Lien pérenne : DOI : 10.1046/j.1365-3180.2003.00326.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=134138 Marshall, Edward Jon (1952-), Brown, Valerie K., Boatman, Nigel, Lutman, P. J. W., Squire, Geoffrey R., Ward, L. K. 2003 The role of weeds in supporting biological diversity within crop fields. Weed Research, 43(2) : 77-89.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21740 JC Tiré à part Bureaux Conservation Consultable
