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Low-Input maize-based cropping systems implementing IWM match conventional maize monoculture productivity and weed control

Adeux, Guillaume and Giuliano, Simon and Cordeau, Stéphane and Savoie, Jean-Marie and Alletto, Lionel Low-Input maize-based cropping systems implementing IWM match conventional maize monoculture productivity and weed control. (2017) Agriculture, 7 (9). 1-17. ISSN 2077-0472

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Official URL: http://dx.doi.org/10.3390/agriculture7090074

Abstract

Conventional Maize Monoculture (MM), a dominant cropping system in south-western France, is now questioned for environmental reasons (nitrate leaching, pesticide use and excessive irrigation). Three low-input Cropping Systems (CS) using diverse weeding strategies (MMLI, a low-input MM implementing ploughing, a combination of on-row spraying and in-between row cultivation and cover crops; MMCT, conservation tillage MM implementing chemical control and cover crops; Maize-MSW, maize managed similar to MMLI but rotated with soybean & wheat) were compared to a reference system (MMConv, a conventional MM with tillage and a high quantity of inputs). Potential of Infestation of weeds (PI), weed biomass and crop production of these CS were compared during the first five years after their establishment. fields were also assessed in weed-free zones hand-weeded weekly in 2014 and 2015. Weed communities did not drastically differ among CS. PI and weed biomass were higher in MMCT, especially for Echinochloa crus-galli (L.) P.Beauv. and were comparable between MMConv, MMLI and Maize-MSW. Analysis of covariance between CS and weed biomass did not reveal a significant interaction, suggesting that weed biomass affected yield similarly among the CS. Comparison between weedy and weed-free zones suggested that weeds present at maize maturity negatively affected yields to the same extent for all four CS, despite having different weed biomasses. Grain yields in MMConv (11.3 ± 1.1 t ha−1) and MMLI (10.6 ± 2.3 t ha−1) were similar and higher than in MMCT (8.2 ± 1.9 t ha−1. Similar yields, weed biomasses and PI suggest that MMLI and Maize-MSW are interesting alternatives to conventional MM in terms of weed control and maize productivity and should be transferred to farmers to test their feasibility under wider, farm-scale conditions.

Item Type:Article
Additional Information:Thanks to MDPI editor. The definitive version is available at http://www.mdpi.com/ The original PDF of the article can be found at Agriculture website : http://www.mdpi.com/journal/agriculture
ProdINRA Id:407318
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement - AgroSup Dijon (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Université de Bourgogne - UB (FRANCE)
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Deposited On:03 Nov 2017 14:05

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