Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2007
Volume 10
Issue 2
Topic:
Agronomy
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Sobkowicz P. , Podgórska-Lesiak M. 2007. EXPERIMENTS WITH CROP MIXTURES: INTERACTIONS, DESIGNS AND INTERPRETATION, EJPAU 10(2), #22.
Available Online: http://www.ejpau.media.pl/volume10/issue2/abs-22.html

EXPERIMENTS WITH CROP MIXTURES: INTERACTIONS, DESIGNS AND INTERPRETATION

Piotr Sobkowicz1, Magdalena Podgórska-Lesiak2
1 Department of Agroecosystems and Green Areas Management, Wroc³aw University of Environmental and Life Sciences, Poland
2 Department of Soil Management and Plant Cultivation, Wroc³aw University of Environmental and Life Sciences, Poland

 

ABSTRACT



Mixture is a system of two or more species that interact with each other in different ways. Interspecific competition, resource complementarity and facilitation may shape performance of a mixture and if the phenomena act together, problem occurs with proper interpretation of results of a simple mixture experiment. To study interactions in crop mixtures and their productivity various designs have been used, like proportional substitutive, substitutive, simple additive and unconstrained design. All these designs have some limitations and they do not answer the same questions about interspecific competition and productivity of mixtures. More extended structures such as addition series and bivariate factorial design are probably more appropriate for this purpose but size of field experiments conducted according to these designs limits their use.

Key words: crop mixtures, competition, resource complementarity facilitation, mixture design, RYT, LER.

Piotr Sobkowicz
Department of Agroecosystems and Green Areas Management, Wroc³aw University of Environmental and Life Sciences, Poland
pl. Grunwaldzki 24a
50-363 Wroc³aw
Poland
email: piotr.sobkowicz@up.wroc.pl

Magdalena Podgórska-Lesiak
Department of Soil Management and Plant Cultivation,
Wroc³aw University of Environmental and Life Sciences, Poland
pl. Grunwaldzki 24a, 50-363 Wroc³aw, Poland

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.

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