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What determines a productive winter bean-wheat genotype combination for intercropping in central Germany?

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Relation http://oar.icrisat.org/11901/
https://doi.org/10.1016/j.eja.2021.126294
doi:10.1016/j.eja.2021.126294
 
Title What determines a productive winter bean-wheat genotype combination for intercropping in central Germany?
 
Creator Nelson, W C D
Siebrecht-Schöll, D J
Hoffmann, M P
Rötter, R P
Whitbread, A M
Link, W
 
Subject Genetics and Genomics
Wheat
 
Description genotypes.
Our study evaluates the performance of three winter wheat cultivars and eight winter faba bean genotypes
(experimental inbred lines) sown as replacement row intercrops with sole cropping comparisons.
Detailed agronomic, physiological and soil-based measurements were taken over three consecutive autumn-sown
seasons at two sites (a marginal versus a fertile soil) in central Germany. This study aimed to contribute to our
understanding of key traits required to achieve highly complementary and well-performing intercrops.
Faba bean plus wheat intercrops yielded higher than sole crop equivalents at both sites, but more so at the
marginal site (34 % > 12 %). High intercrop yields were associated with high wheat component yields. Such
stands included faba bean genotypes that exhibited low leaf area index (LAI) values and low plant height. Tall
and large faba beans i.e. with high vegetative biomass led to excessive lodging, both as a sole crop and when
intercropped. To some extent, this concealed effects of faba bean genotype trait variation that would have
otherwise been visible had lodging not occurred. The expression of these traits was heavily influenced by
variation in environmental conditions. At the less fertile site, even tall intercropped faba beans showed relatively
lower vegetative biomass, which promoted intercropped wheat and led to superior overyielding values and
relative yield total.
While site-specific differences are key, German winter faba beans need further genetic improvement to refrain
from superfluous biomass growth when water resources are plentiful.
 
Publisher ELSEVIER
 
Date 2021-05
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11901/1/nelson%202021%20german%20intercropping%20EJA.pdf
Nelson, W C D and Siebrecht-Schöll, D J and Hoffmann, M P and Rötter, R P and Whitbread, A M and Link, W (2021) What determines a productive winter bean-wheat genotype combination for intercropping in central Germany? European Journal of Agronomy (TSI), 128. pp. 1-9. ISSN 1161-0301