1. Determination of germination response to temperature and water potential for a wide range of cover crop species and related functional groups
- Author
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Eric Justes, Hélène Tribouillois, Marie-Hélène Wagner, Carolyne Dürr, Didier Demilly, Justes, Eric, AGroécologie, Innovations, teRritoires (AGIR), Institut National de la Recherche Agronomique (INRA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Institut de Recherche en Horticulture et Semences (IRHS), Université d'Angers (UA)-Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), 0971 Gip Geves SNES Angers, Institut National de la Recherche Agronomique (INRA)-Accueil GEVES (Accueil GEVES)-Groupe d'étude et de controle des variétés et des semences (GEVES)-Gip Geves SNES Angers (Gip Geves SNES Angers), GEVES SEV, Partenaires INRAE, and Study was financed by Arvalis–Institut du Végétal, the Midi-Pyrénées Region, the CASDAR-CTPS project C2011-2013, the ADEME project CiCC and UMR AGIR INRA.
- Subjects
0106 biological sciences ,[SDV.SA]Life Sciences [q-bio]/Agricultural sciences ,Hot Temperature ,cardinal temperatures ,Range (biology) ,Climate ,Biodiversité et Ecologie ,lcsh:Medicine ,Plant Science ,Plant Reproduction ,base temperature ,base water potential ,germination parameters ,catch crop ,cover crop ,seed ,01 natural sciences ,Soil ,Agricultural Soil Science ,Seed Germination ,Evolutionary Emergence ,lcsh:Science ,Cover crop ,2. Zero hunger ,Multidisciplinary ,Plant Anatomy ,food and beverages ,Fabaceae ,Agriculture ,04 agricultural and veterinary sciences ,Plants ,[SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics ,Legumes ,Crop Production ,Droughts ,Agricultural sciences ,Botanique ,Germination ,Plant Physiology ,Seeds ,Seasons ,Research Article ,Crops, Agricultural ,Botanics ,Evolutionary Processes ,Setaria ,Nitrogen ,Summer ,Soil Science ,Biology ,Poaceae ,Crop ,Biodiversity and Ecology ,Ecosystem ,Grasses ,Nitrogen cycle ,Evolutionary Biology ,lcsh:R ,Ecology and Environmental Sciences ,fungi ,Organisms ,Biology and Life Sciences ,Water ,Sowing ,15. Life on land ,Agronomy ,Brassicaceae ,Earth Sciences ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,lcsh:Q ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Sciences agricoles ,010606 plant biology & botany - Abstract
National audience; A wide range of species can be sown as cover crops during fallow periods to provide vari- ous ecosystem services. Plant establishment is a key stage, especially when sowing occurs in summer with high soil temperatures and low water availability. The aim of this study was to determine the response of germination to temperature and water potential for diverse cover crop species. Based on these characteristics, we developed contrasting functional groups that group species with the same germination ability, which may be useful to adapt species choice to climatic sowing conditions. Germination of 36 different species from six botanical families was measured in the laboratory at eight temperatures ranging from 4.5 – 43°C and at four water potentials. Final germination percentages, germination rate, cardinal temperatures, base temperature and base water potential were calculated for each species. Optimal temperatures varied from 21.3 – 37.2°C, maximum temperatures at which the spe- cies could germinate varied from 27.7 – 43.0°C and base water potentials varied from -0.1 to -2.6 MPa. Most cover crops were adapted to summer sowing with a relatively high mean optimal temperature for germination, but some Fabaceae species were more sensitive to high temperatures. Species mainly from Poaceae and Brassicaceae were the most resistant to water deficit and germinated under a low base water potential. Species were classified, independent of family, according to their ability to germinate under a range of temperatures and according to their base water potential in order to group species by func- tional germination groups. These groups may help in choosing the most adapted cover crop species to sow based on climatic conditions in order to favor plant establishment and the services provided by cover crops during fallow periods. Our data can also be useful as ger- mination parameters in crop models to simulate the emergence of cover crops under differ- ent pedoclimatic conditions and crop management practices.
- Published
- 2016
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