caa a22 4500 606220232 CHVBK 20210128101122.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11104-015-2501-x doi (NATIONALLICENCE)springer-10.1007/s11104-015-2501-x Rain regime and soil type affect the C and N dynamics in soil columns that are covered with mixed-species mulches [Elektronische Daten] [Akhtar Iqbal, Sohaib Aslam, Gonzague Alavoine, Pierre Benoit, Patricia Garnier, Sylvie Recous] Aims: The role of precipitation on the decomposition of residue mulches is of primary importance for the adequate management of nutrients in no-tilled agrosystems. The objective of this work was to understand the interactions between water dynamics and crop residue quality and their effect on carbon (C) and nitrogen (N) mineralization. Methods: The decomposition of two residue mixtures (wheat + alfalfa and maize + lablab) left at the surface of repacked soil columns, was studied under controlled conditions, at 20°C over 84days. Simulated rain pulses were either light and frequent or heavy and infrequent. A loamy soil (Luvisol) and a sandy soil (Ferralsol) were used. Results: The maize/lablab mulch remained wetter between rain pulses which induced greater decomposition than the wheat/alfalfa mulch. Frequent/light rain pulses maintained the mulches wetter between pulses than infrequent/heavy rain pulses, and therefore these mulches decomposed faster. The loamy soil favored the moistening of the mulch layer in contact with the soil which enhanced its decomposition, compared to the sandy soil. Conclusions: The water dynamics (water content of the mulches and soil, evaporation, and drainage) was highly modified by residue quality, rain regime and soil type, which in turn significantly affected the mineralization of C and N. Springer International Publishing Switzerland, 2015 Conservation agriculture nationallicence Crop residue nationallicence Decomposition nationallicence Drought nationallicence Mulching nationallicence Rain pulses nationallicence Iqbal Akhtar INRA, UMR614 Fractionnement des AgroRessources et Environnement, F-51100, Reims, France aut Aslam Sohaib INRA, UMR1091 Environnement et Grandes Cultures, F-78500, Thiverval-Grignon, France aut Alavoine Gonzague INRA, UMR614 Fractionnement des AgroRessources et Environnement, F-51100, Reims, France aut Benoit Pierre INRA, UMR1091 Environnement et Grandes Cultures, F-78500, Thiverval-Grignon, France aut Garnier Patricia INRA, UMR1091 Environnement et Grandes Cultures, F-78500, Thiverval-Grignon, France aut Recous Sylvie INRA, UMR614 Fractionnement des AgroRessources et Environnement, F-51100, Reims, France aut Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 319-334 0032-079X 393:1-2<319 2015 393 11104 https://doi.org/10.1007/s11104-015-2501-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2501-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Iqbal Akhtar INRA, UMR614 Fractionnement des AgroRessources et Environnement, F-51100, Reims, France aut NATIONALLICENCE 700 1- Aslam Sohaib INRA, UMR1091 Environnement et Grandes Cultures, F-78500, Thiverval-Grignon, France aut NATIONALLICENCE 700 1- Alavoine Gonzague INRA, UMR614 Fractionnement des AgroRessources et Environnement, F-51100, Reims, France aut NATIONALLICENCE 700 1- Benoit Pierre INRA, UMR1091 Environnement et Grandes Cultures, F-78500, Thiverval-Grignon, France aut NATIONALLICENCE 700 1- Garnier Patricia INRA, UMR1091 Environnement et Grandes Cultures, F-78500, Thiverval-Grignon, France aut NATIONALLICENCE 700 1- Recous Sylvie INRA, UMR614 Fractionnement des AgroRessources et Environnement, F-51100, Reims, France aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 319-334 0032-079X 393:1-2<319 2015 393 11104