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Intercropping strategies of white clover with organic wheat to improve the trade-off between wheat yield, protein content and the provision of ecological services by white clover

Vrignon-Brenas, Sylvain; Celette, Florian; Piquet, Agnès; Corre-Hellou, Guénaëlle and David, Christophe (2018) Intercropping strategies of white clover with organic wheat to improve the trade-off between wheat yield, protein content and the provision of ecological services by white clover. Field Crops Research, pp. 160-169.

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Document available online at: https://hal.archives-ouvertes.fr/hal-01843737


Summary

Nitrogen (N) deficiency and weed infestation are the main factors limiting the yield and quality of organic soft winter wheat (Triticum aestivum L.). If forage legumes are associated with wheat, simultaneously or successively, they can help to reduce the impact of limiting factors through the ecological services they provide. The aim of this study was to evaluate two intercropping strategies to increase soft winter wheat yield and protein content and improve the provided ecological services (mainly N provisioning and weed control) by white clover (Trifolitum repens L.). White clover (Thfolium repens L. cv Aberdai) was intercropped with soft winter wheat (Triticum aestivum L. cv Renan) under organic conditions. Two strategies were compared, simultaneous intercropping versus relay intercropping using three field experiments. A control treatment with sole wheat crop was included in the three field experiments. Fertilization management on organic wheat was also tested (0 versus 100 kg N applied at spring time) to evaluate its incidence on cash and cover crop yields and protein content. White clover shoot dry matter (DM) was significantly higher in simultaneous intercropping compared to relay intercropping at wheat harvest (2.2 vs. 0.1 Mg DM ha(-1)) and at cover destruction (4.5 vs. 3.1 Mg DM ha(-1)). Wheat grain yield was not affected by the intercropping strategy while the protein content was significantly lower under simultaneous intercropping system (9.1% of the grain DM) compared to relay intercropping or in wheat as sole crop (10.0% of the grain DM). At cover destruction, both simultaneous and relay intercropped white clover significantly decreased weed shoot DM compared to sole wheat crop (-1.4 Mg DM ha(-1) for relay intercropping and -1.8 Mg DM ha(-1) for simultaneous intercropping). In comparison to relay intercropping strategy, N accumulation in white clover shoot DM was higher under simultaneous intercropping strategy at wheat harvest (52 vs. 2 kg N ha(-1)) and at cover destruction (123 vs. 83 kg N ha(-1)). In conclusion, our study has highlighted the positive effect of combining a simultaneous intercropping strategy with high N availability to guarantee a sufficient level of legume shoot DM as rapidly as possible to increase both N accumulation and weed control services, thus reducing the risk of impairing winter wheat yield and protein content.


EPrint Type:Journal paper
Keywords:Relay intercropping (en), Winter (en), wheat (en), Ecological services (en), pea-barley intercrops (en), legume cover crops (en), winter-wheat (en), n-2 fixation (en), farming systems (en), living mulches (en), forage legumes (en), microbial culture (en), white clover (en), nitrogen (en), availability (en), Agriculture (en), Simultaneous intercropping (en), soil n (en), trifolium repens (fr), culture cellulaire (fr), blé d'hiver (fr)
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 0378-4290
DOI:10.1016/j.fcr.2018.05.009
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41372
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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