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Faba bean variety mixture can modulate faba bean-wheat intercrop performance under water limitation

Bargaz, Adnane and Nasielski, Joshua and Isaac, Marney E. and Jensen, Erik Steen and Carlsson, Georg (2021). Faba bean variety mixture can modulate faba bean-wheat intercrop performance under water limitation. Frontiers in Agronomy. 3 , 655973
[Research article]

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Abstract

Commercial legume varieties vary in terms of their drought tolerance when grown as sole crops, though relatively little is known about how legume variety selection affects cereal–legume intercrop performance under drought conditions. This study aims to test the hypothesis that positive rhizosphere interactions in faba bean–wheat intercrops will confer a “buffering capacity” on faba bean and wheat performance under water stress and that this effect will (i) depend on faba bean varietal selection and (ii) be enhanced with increasing faba bean varietal diversity. In a greenhouse experiment, three commercial faba bean (Vicia faba L.) varieties [Gloria (G), Alexia (A), Julia (J)] were grown in sole crop or intercropped with spring wheat (Triticum aestivum L.) under well-watered or water-stress conditions. Under intercropping, either one, two, or all three faba bean varieties were grown together with wheat to test the effect of intraspecific diversity on a cereal–legume intercrop performance. Consistent with the proposed hypothesis, we found that, under well-watered and water-stress conditions, wheat and faba bean shoot biomass production and nitrogen (N) acquisition improved with intercropping and that faba bean variety and variety mixture strongly modulated the intercropping effect. Interestingly, in both well-watered and water-stress conditions, wheat dry biomass and N accumulation were greatest in intercrops containing Gloria, while nodule number, nodule weight, and N accumulation in faba bean were greatest for intercrops containing Alexia and Julia (AJ). The effect of varietal diversity was inconsistent. Intercrops with two faba bean varieties tended to have positive or neutral effects on measured wheat and faba bean variables. However, overall performance under intercropping was generally reduced when all three faba bean varieties were planted with wheat. The effect of faba bean species diversity can buffer faba bean–wheat intercrop performance against water stress, and intercropping tended to have positive or neutral effects on the measured wheat and faba bean variables, notably with two-varietal faba bean mixtures.

Authors/Creators:Bargaz, Adnane and Nasielski, Joshua and Isaac, Marney E. and Jensen, Erik Steen and Carlsson, Georg
Title:Faba bean variety mixture can modulate faba bean-wheat intercrop performance under water limitation
Series Name/Journal:Frontiers in Agronomy
Year of publishing :2021
Volume:3
Article number:655973
Number of Pages:12
Associated Programs and Other Stakeholders:Z - SLU - Library > Odla mera
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:cereal, drought, intercropping, legumes, nitrogen, nodulation, Vicia faba
URN:NBN:urn:nbn:se:slu:epsilon-p-114414
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114414
Additional ID:
Type of IDID
DOI10.3389/fagro.2021.655973
ID Code:26200
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Biosystems and Technology (from 130101)
Deposited By: SLUpub Connector
Deposited On:24 Nov 2021 16:25
Metadata Last Modified:25 Nov 2021 05:01

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