The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability

G. Corre-Hellou, A. Dibet, Henrik Hauggaard-Nielsen, Y. Crozat, M. Gooding, Per Ambus, C. Dahlmann, P. von Fragstein, A. Pristeri, M. Monti, E.S. Jensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Grain legumes, such as peas (Pisum sativum L.), are known to be weak competitors against weeds when grown as the sole crop. In this study, the weed-suppression effect of pea–barley (Hordeum vulgare L.) intercropping compared to the respective sole crops was examined in organic field experiments across Western Europe (i.e., Denmark, the United Kingdom, France, Germany and Italy). Spring pea (P) and barley (B) were sown either as the sole crop, at the recommended plant density (P100 and B100, respectively), or in replacement (P50B50) or additive (P100B50) intercropping designs for three seasons (2003–2005). The weed biomass was three times higher under the pea sole crops than under both the intercrops and barley sole crops at maturity. The inclusion of joint experiments in several countries and various growing conditions showed that intercrops maintain a highly asymmetric competition over weeds, regardless of the particular weed infestation (species and productivity), the crop biomass or the soil nitrogen availability. The intercropping weed suppression was highly resilient, whereas the weed suppression in pea sole crops was lower and more variable. The pea–barley intercrops exhibited high levels of weed suppression, even with a low percentage of barley in the total biomass. Despite a reduced leaf area in the case of a low soil N availability, the barley sole crops and intercrops displayed high weed suppression, probably because of their strong competitive capability to absorb soil N. Higher soil N availabilities entailed increased leaf areas and competitive ability for light, which contributed to the overall competitive ability against weeds for all of the treatments. The contribution of the weeds in the total dry matter and soil N acquisition was higher in the pea sole crop than in the other treatments, in spite of the higher leaf areas in the pea crops.
    Original languageEnglish
    JournalField Crops Research
    Volume122
    Issue number3
    Pages (from-to)264-272
    ISSN0378-4290
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Bio refinery

    Cite this

    Corre-Hellou, G., Dibet, A., Hauggaard-Nielsen, H., Crozat, Y., Gooding, M., Ambus, P., ... Jensen, E. S. (2011). The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability. Field Crops Research, 122(3), 264-272. https://doi.org/10.1016/j.fcr.2011.04.004
    Corre-Hellou, G. ; Dibet, A. ; Hauggaard-Nielsen, Henrik ; Crozat, Y. ; Gooding, M. ; Ambus, Per ; Dahlmann, C. ; von Fragstein, P. ; Pristeri, A. ; Monti, M. ; Jensen, E.S. / The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability. In: Field Crops Research. 2011 ; Vol. 122, No. 3. pp. 264-272.
    @article{88394473aceb467db5ee01fc8a3319fa,
    title = "The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability",
    abstract = "Grain legumes, such as peas (Pisum sativum L.), are known to be weak competitors against weeds when grown as the sole crop. In this study, the weed-suppression effect of pea–barley (Hordeum vulgare L.) intercropping compared to the respective sole crops was examined in organic field experiments across Western Europe (i.e., Denmark, the United Kingdom, France, Germany and Italy). Spring pea (P) and barley (B) were sown either as the sole crop, at the recommended plant density (P100 and B100, respectively), or in replacement (P50B50) or additive (P100B50) intercropping designs for three seasons (2003–2005). The weed biomass was three times higher under the pea sole crops than under both the intercrops and barley sole crops at maturity. The inclusion of joint experiments in several countries and various growing conditions showed that intercrops maintain a highly asymmetric competition over weeds, regardless of the particular weed infestation (species and productivity), the crop biomass or the soil nitrogen availability. The intercropping weed suppression was highly resilient, whereas the weed suppression in pea sole crops was lower and more variable. The pea–barley intercrops exhibited high levels of weed suppression, even with a low percentage of barley in the total biomass. Despite a reduced leaf area in the case of a low soil N availability, the barley sole crops and intercrops displayed high weed suppression, probably because of their strong competitive capability to absorb soil N. Higher soil N availabilities entailed increased leaf areas and competitive ability for light, which contributed to the overall competitive ability against weeds for all of the treatments. The contribution of the weeds in the total dry matter and soil N acquisition was higher in the pea sole crop than in the other treatments, in spite of the higher leaf areas in the pea crops.",
    keywords = "Bio refinery, Bioraffinaderi",
    author = "G. Corre-Hellou and A. Dibet and Henrik Hauggaard-Nielsen and Y. Crozat and M. Gooding and Per Ambus and C. Dahlmann and {von Fragstein}, P. and A. Pristeri and M. Monti and E.S. Jensen",
    year = "2011",
    doi = "10.1016/j.fcr.2011.04.004",
    language = "English",
    volume = "122",
    pages = "264--272",
    journal = "Field Crops Research",
    issn = "0378-4290",
    publisher = "Elsevier",
    number = "3",

    }

    Corre-Hellou, G, Dibet, A, Hauggaard-Nielsen, H, Crozat, Y, Gooding, M, Ambus, P, Dahlmann, C, von Fragstein, P, Pristeri, A, Monti, M & Jensen, ES 2011, 'The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability', Field Crops Research, vol. 122, no. 3, pp. 264-272. https://doi.org/10.1016/j.fcr.2011.04.004

    The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability. / Corre-Hellou, G.; Dibet, A.; Hauggaard-Nielsen, Henrik; Crozat, Y.; Gooding, M.; Ambus, Per; Dahlmann, C.; von Fragstein, P.; Pristeri, A.; Monti, M.; Jensen, E.S.

    In: Field Crops Research, Vol. 122, No. 3, 2011, p. 264-272.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - The competitive ability of pea–barley intercrops against weeds and the interactions with crop productivity and soil N availability

    AU - Corre-Hellou, G.

    AU - Dibet, A.

    AU - Hauggaard-Nielsen, Henrik

    AU - Crozat, Y.

    AU - Gooding, M.

    AU - Ambus, Per

    AU - Dahlmann, C.

    AU - von Fragstein, P.

    AU - Pristeri, A.

    AU - Monti, M.

    AU - Jensen, E.S.

    PY - 2011

    Y1 - 2011

    N2 - Grain legumes, such as peas (Pisum sativum L.), are known to be weak competitors against weeds when grown as the sole crop. In this study, the weed-suppression effect of pea–barley (Hordeum vulgare L.) intercropping compared to the respective sole crops was examined in organic field experiments across Western Europe (i.e., Denmark, the United Kingdom, France, Germany and Italy). Spring pea (P) and barley (B) were sown either as the sole crop, at the recommended plant density (P100 and B100, respectively), or in replacement (P50B50) or additive (P100B50) intercropping designs for three seasons (2003–2005). The weed biomass was three times higher under the pea sole crops than under both the intercrops and barley sole crops at maturity. The inclusion of joint experiments in several countries and various growing conditions showed that intercrops maintain a highly asymmetric competition over weeds, regardless of the particular weed infestation (species and productivity), the crop biomass or the soil nitrogen availability. The intercropping weed suppression was highly resilient, whereas the weed suppression in pea sole crops was lower and more variable. The pea–barley intercrops exhibited high levels of weed suppression, even with a low percentage of barley in the total biomass. Despite a reduced leaf area in the case of a low soil N availability, the barley sole crops and intercrops displayed high weed suppression, probably because of their strong competitive capability to absorb soil N. Higher soil N availabilities entailed increased leaf areas and competitive ability for light, which contributed to the overall competitive ability against weeds for all of the treatments. The contribution of the weeds in the total dry matter and soil N acquisition was higher in the pea sole crop than in the other treatments, in spite of the higher leaf areas in the pea crops.

    AB - Grain legumes, such as peas (Pisum sativum L.), are known to be weak competitors against weeds when grown as the sole crop. In this study, the weed-suppression effect of pea–barley (Hordeum vulgare L.) intercropping compared to the respective sole crops was examined in organic field experiments across Western Europe (i.e., Denmark, the United Kingdom, France, Germany and Italy). Spring pea (P) and barley (B) were sown either as the sole crop, at the recommended plant density (P100 and B100, respectively), or in replacement (P50B50) or additive (P100B50) intercropping designs for three seasons (2003–2005). The weed biomass was three times higher under the pea sole crops than under both the intercrops and barley sole crops at maturity. The inclusion of joint experiments in several countries and various growing conditions showed that intercrops maintain a highly asymmetric competition over weeds, regardless of the particular weed infestation (species and productivity), the crop biomass or the soil nitrogen availability. The intercropping weed suppression was highly resilient, whereas the weed suppression in pea sole crops was lower and more variable. The pea–barley intercrops exhibited high levels of weed suppression, even with a low percentage of barley in the total biomass. Despite a reduced leaf area in the case of a low soil N availability, the barley sole crops and intercrops displayed high weed suppression, probably because of their strong competitive capability to absorb soil N. Higher soil N availabilities entailed increased leaf areas and competitive ability for light, which contributed to the overall competitive ability against weeds for all of the treatments. The contribution of the weeds in the total dry matter and soil N acquisition was higher in the pea sole crop than in the other treatments, in spite of the higher leaf areas in the pea crops.

    KW - Bio refinery

    KW - Bioraffinaderi

    U2 - 10.1016/j.fcr.2011.04.004

    DO - 10.1016/j.fcr.2011.04.004

    M3 - Journal article

    VL - 122

    SP - 264

    EP - 272

    JO - Field Crops Research

    JF - Field Crops Research

    SN - 0378-4290

    IS - 3

    ER -