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Altered Nitrogen Availability in Pea-Barley Sole- and Intercrops Changes Dominance of Two Nitrophilic Weed Species

Jäck, Ortrud and Ajal, James and Weih, Martin (2021). Altered Nitrogen Availability in Pea-Barley Sole- and Intercrops Changes Dominance of Two Nitrophilic Weed Species. Agronomy. 11 , 679
[Research article]

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Abstract

Effective and sustainable weed management in agricultural fields is a prerequisite for increasing crop yield without negatively impacting the environment. The aim of this study was to explore how varying nitrogen (N) availability in cropping arrangements of pea (Pisum sativum) and barley (Hordeum vulgare) grown as sole crops and intercrops at different fertilization levels and considering different N sources (soil mineralization, N fixation, N fertilizer) affects the response of weed species with differential N responsiveness. Crop and weed biomass were sampled at flowering and maturity. The total N content and N-15 isotope signatures were analyzed to differentiate between N sources and to estimate the amount of N available to weeds. The highly N-responsive weed (Chenopodium album) accumulated more N and biomass than the weed with reduced N responsiveness (Galeopsis spp.). Fertilizer supply favored Chenopodium album, but not the crops. Altered soil N availability caused a shift in the dominance of the nitrophilic weed species towards the highly N-responsive species. This shift in dominance could affect the long-term weed community composition and thus have implications for sustainable weed management.

Authors/Creators:Jäck, Ortrud and Ajal, James and Weih, Martin
Title:Altered Nitrogen Availability in Pea-Barley Sole- and Intercrops Changes Dominance of Two Nitrophilic Weed Species
Series Name/Journal:Agronomy
Year of publishing :2021
Volume:11
Article number:679
Number of Pages:19
Publisher:MDPI
ISSN:2073-4395
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:crop-weed interaction, nitrogen availability, intercropping, weed nitrogen uptake, N-15, plant-plant interaction, isotope technique
URN:NBN:urn:nbn:se:slu:epsilon-p-111823
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111823
Additional ID:
Type of IDID
DOI10.3390/agronomy11040679
Web of Science (WoS)000642667000001
ID Code:23700
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: SLUpub Connector
Deposited On:17 May 2021 10:03
Metadata Last Modified:17 May 2021 10:11

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