eprintid: 6002
rev_number: 2
eprint_status: archive
userid: 1511
dir: disk0/00/00/60/02
datestamp: 2005-11-14
lastmod: 2010-04-12 07:31:45
status_changed: 2009-08-20 14:28:15
type: journalp
metadata_visibility: show
item_issues_count: 0
doclang: en
projects: kvl
projects: dk-risoe
projects: dk-soar
refereed: yes
budget: 0
docurl: http://www.springerlink.com/link.asp?id=j081w72368818035
publicfulltext: TRUE
creators_name: Andersen, Mette Klindt
creators_name: Hauggaard-Nielsen, Henrik
creators_name: Ambus, Per
creators_name: Jensen, Erik Steen
title: Biomass production, symbiotic nitrogen fixation and inorganic N use in dual and tri-component annual intercrops
ispublished: pub
subjects: 4nutrient
subjects: 2cropcomb
keywords: barley - competition - complementarity - diversity - pea - rape
abstract: The interspecific complementary and competitive interactions between pea (Pisum sativum L.), barley (Hordeum vulgare L.) and oilseed rape (Brassica napus L.), grown as dual and tri-component intercrops were assessed in a field study in Denmark. Total biomass production and N use at two levels of N fertilisation (0.5 and 4.0 g N/m2), were measured at five harvests throughout a growing season. All intercrops displayed land equivalent ratio values close to or exceeding unity, indicating complementary use of growth resources. Whereas both rape and barley responded positively to increased N fertilisation, irrespective of whether they were grown as sole- or intercrops, pea was strongly suppressed when grown in intercrop. Of the three crops barley was the strongest competitor for both soil and fertiliser N, rape intermediate and pea the weakest. Faster initial growth of barley than pea and rape gave barley an initial competitive advantage, an advantage that in the two dual intercrops was strengthened by the addition of N. Apparently the competitive superiority of barley was less strong in the tri-component intercrop, indicating that the impact of the dominantmay, through improved growth of both rape and pea, have been diminished through indirect facilitation. Interspecific competition had a promoting effect on the percent of nitrogen derived from N2 fixation of pea, and most so at the low N fertilisation level. Results indicate that the benefits achieved from the association of a legume and nonlegume, in terms of N2 fixed were greatest when pea was grown in association with rape as opposed to barley which could indicate that the benefits achieved from the association of a legume and nonlegume are partly lost if the nonlegume is too strong a competitor.

date: 2004
date_type: published
publication: Plant and Soil
volume: 266
publisher: Kluwer Academic
editors_name: Yongguan, Zhu
full_text_status: public
pagerange: 273-287
fp7_project: no
access_rights: info:eu-repo/semantics/openAccess
citation:    Andersen, Mette Klindt; Hauggaard-Nielsen, Henrik; Ambus, Per and Jensen, Erik Steen   (2004) Biomass production, symbiotic nitrogen fixation and inorganic N use in dual and tri-component annual intercrops.   Plant and Soil, 266, pp. 273-287.        
document_url: /id/eprint/6002/1/MKA.pdf