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Effekte der Sorten‐ (Weizen)und der Arten‐ (Weizen, Roggen) Mischung auf die Ertragsleistung krankheitsfreier Bestände
Author(s) -
Aufhammer W.,
Kempf H.,
Stützel H.
Publication year - 1989
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1989.tb00774.x
Subject(s) - yield (engineering) , grain yield , cultivar , winter wheat , agronomy , nitrogen , mixing (physics) , mathematics , biology , chemistry , materials science , physics , organic chemistry , metallurgy , quantum mechanics
Effects of cultivar (wheat) and species (wheat, rye) mixtures on grain yield of desease‐free stands Cultivar mixtures (winter wheat) and species mixtures (winter wheat/winter rye) grown free from pests and diseases in different environments are compared to pure stands and analyzed with respect to inter‐component relationships relevant for yield. All mixtures consisted from two components which were planted 1:1. Mixing effects (i.e. deviations from arithmetic mean of respective components grown in pure stands) on grain yield/ha and yield structure were dependent on components and growing conditions, particularly nitrogen availability. Under conditions suboptimal for one component, ontogenetic differences between components resulted in positive mixing effects on grain yield since the yield proportion of the accompanying partner increased more than proportionally. In several instances, yield proportions shitted without leading to mixing effects. In some experiments and/or mixtures mixing effects could not be observed at all.