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PRODIVA Project: Crop species mixtures for weed suppression�

Verwijst, Theo; Lundkvist, Anneli; Krawczyk, Roman and Kaczmarek, Sylvia (2018) PRODIVA Project: Crop species mixtures for weed suppression�. . [Completed]

[thumbnail of S02-O  041  Verwijst et al. PRODIVA WP2.pdf]
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The aim of this study is to assess the weed suppressive ability of crop mixtures and impact of weeds on crop yield as a function of species and densities by means of field experiments and controlled experiments with mixtures of barley and pea, conducted in Sweden and Poland. The performance of crop mixtures was compared to the performance of pure crops with regard to their ability to suppress weeds. In the fields, natural weed populations were used while the controlled experiments employed Elytrigia repens or Sinapis alba as a model weed.
Preliminary results from the controlled experiment in Sweden showed that the presence of a crop (sole crop or intercrop) significantly diminished the growth of E. repens. The ability to compete was lower in peas, compared to barley and the intercrop. No significant differences were found in the ability to withstand competition between sole cropped pea, sole cropped barley, and the intercrop. In the field experiment, the overall weed pressure was rather high (> 750 g DM m-2). No significant differences in total dry matter were found for spring barley, sown in different proportions in pea/spring barley mixtures. Total dry matter of peas was related to pea seeding density.
Preliminary results from the field experiment in Poland showed that crops significantly suppressed weeds compared with the treatment containing only weeds. In the crop combination containing sole peas and 70% peas + 30% spring barley, the crop was not able to suppress the weeds as efficient as in treatments with a higher proportion of spring barley. No significant differences in seed yield were found between the treatments. In the glass house experiment with E. repens, the rhizome dry weight and rhizome length were significantly lower in treatments with both crop and weeds as compared with pure weeds.

EPrint Type:Other
Subjects: Crop husbandry > Crop combinations and interactions
Environmental aspects > Biodiversity and ecosystem services
Crop husbandry > Weed management
Research affiliation: Poland
European Union > CORE Organic Plus > PRODIVA
Sweden > Swedish University of Agricultural Sciences (SLU) > Department of Crop Production Ecology
Horizon Europe or H2020 Grant Agreement Number:618107
Deposited By: Lundkvist, Dr Anneli
ID Code:33516
Deposited On:11 Jul 2018 19:19
Last Modified:11 Jul 2018 19:19
Document Language:English
Additional Publishing Information:Powerpoint presentation at the 18th European Weed Research Society Symposium EWRS 2018, 17-21 June 2018 Ljubljana, Slovenia

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