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7 results on '"Douzet, J.M."'

3. Lutte antiérosive : réhabilitation des sols tropicaux et protection contre les pluies exceptionnelles

Author

Razafindramanana Norosoa, Christine, Douzet, J.M., Barthès, Bernard, Rabeharisoa, L., Albrecht, Alain, Roose, Eric (ed.), Duchaufour, H. (ed.), and De Noni, Georges (ed.)

Subjects
CONSERVATION DU SOL, RENDEMENT, CULTURE PLUVIALE, COUVERT VEGETAL, SYSTEME DE CULTURE, RIZ PLUVIAL, TRAVAIL DU SOL, PRATIQUE CULTURALE, RUISSELLEMENT, MAIS, LUTTE ANTIEROSIVE, EROSION HYDRIQUE, PLANTE DE COUVERTURE, SEMIS
Published
2012

4. Spécial semis direct

Author

Blanchart, Eric, Barthès, Bernard, Bernoux, Martial, Chapuis Lardy, Lydie, Chotte, Jean-Luc, Coq, S., Douzet, J.M., Falinirina, V., Feller, Christian, Rabary, B., Randriamanantsoa, R., Tatnadass, A., Razafimbelo, T., Scopel, E., Villenave, Cécile, and Weber, L.

Subjects
BIOMASSE, COUVERT VEGETAL, SYSTEME DE CULTURE, MACROFAUNE, TRAVAIL DU SOL, FAUNE DU SOL, DIVERSITE SPECIFIQUE, STOCK, SEMIS DIRECT, PRATIQUE CULTURALE, DENSITE DE POPULATION, CARBONE ORGANIQUE, EVOLUTION DES SOLS SOUS CULTURE, PLANTE DE COUVERTURE, SEMIS
Published
2008

5. Spécial semis direct

Author

Bernoux, Martial, Perrin, A.S., Siqueira Neto, M., Blanchart, Eric, Clemente Cerri, C., Cerri, C.E.P., Corbeels, M., Douzet, j.M., Eschenbrenner, Vincent, Metay, A., Nunez Cardoso, A., Piccolo, M. de C., Scopel, E., Seguy, L., and Feller, Christian

Subjects
COUVERT VEGETAL, SOJA, SYSTEME DE CULTURE, TRAVAIL DU SOL, STOCK, SEMIS DIRECT, CARBONE ORGANIQUE, PRATIQUE CULTURALE, SAVANE ARBOREE, MAIS, EVOLUTION DES SOLS SOUS CULTURE, SORGHO, CERRADO, PLANTE DE COUVERTURE, SEMIS
Published
2008

6. Impactos do sistema de plantio direto com cobertura vegetal (SPDCV) sobre a dinâmica da água, do nitrogênio mineral e do carbono do solo do cerrado brasileiro

Author

Scopel, E., Douzet, J.M., Macena da Silva, F.A., Cardoso, A., Alves Moreira, J.A., Findeling, A., Bernoux, Martial, ALEXANDRE CARDOSO, FERNANDO ANTONIO MACENA DA SILVA, JOSE ALOISIO ALVES MOREIRA, CNPAF, ANTOINE FINDELING, MARTIAL BERNOUX., ERIC SCOPEL, and JEAN-MARIE DOUZET

Subjects
EROSION, COUVERT VEGETAL, BILAN HYDRIQUE, Planta de Cobertura, Biomassa, Reciclagem, SAVANE, RUISSELLEMENT, CERRADOS, AZOTE, EVOLUTION DES SOLS SOUS CULTURE, SORGHO, PLANTE DE COUVERTURE, SEMIS, SEMI DIRECT, Modelagem, MIL, SYSTEME DE CULTURE, RIZ PLUVIAL, Cerrado, STOCK, CARBONE, Plantio Direto, PRATIQUE CULTURALE, Matéria Orgânica, MAIS, HYDRODYNAMIQUE
Abstract

Nas regiões tropicais, principalmente no cerrado brasileiro, para assegurar uma produção agrícola sustentável, é preciso recorrer a novos sistemas de cultura. Por isso, foi desenvolvido o Sistema de Plantio Direto com Cobertura vegetal, que preconiza o não-revolvimento do solo e o cultivo de plantas de cobertura, antes ou depois da cultura comercial, para produzir mais biomassa e proteger permanentemente o solo. Made available in DSpace on 2011-04-09T14:34:15Z (GMT). No. of bitstreams: 1 v22n1p169.pdf: 101798 bytes, checksum: 98c60aec7c709b618f10b4b4ba2ee0fe (MD5) Previous issue date: 2005-12-06

Published
2005

7. Impacts des systèmes de culture en semis direct avec couverture végétale (SCV) sur la dynamique de l'eau, de l'azote minéral et du carbone du sol dans les cerrados brésiliens

Author

Scopel, E., Douzet, J.M., Macena da Silva, F.A., Cardoso, A., Alves Moreira, J.A., Findeling, A., Bernoux, Martial, ERIC SCOPEL, JEAN-MARIE DOUZET, FERNANDO ANTONIO MACENA DA SILVA, ALEXANDRE CARDOSO, JOSE ALOISIO ALVES MOREIRA, CNPAF, ANTOINE FINDELING, and MARTIAL BERNOUX.

Subjects
EROSION, COUVERT VEGETAL, BILAN HYDRIQUE, Agronomia, Planta de Cobertura, SAVANE, RUISSELLEMENT, CERRADOS, AZOTE, EVOLUTION DES SOLS SOUS CULTURE, SORGHO, PLANTE DE COUVERTURE, SEMIS, SEMI DIRECT, MIL, SYSTEME DE CULTURE, RIZ PLUVIAL, Recurso Natural, Cerrado, STOCK, CARBONE, Plantio Direto, PRATIQUE CULTURALE, Solo, Matéria Orgânica, MAIS, Biomassa, HYDRODYNAMIQUE
Abstract

Under the humid tropical climate of the Brazilian cerrados, new cropping systems have become necessary to ensure sustainable agricultural production. Direct-sowing mulch-based cropping systems (DMC) introduce a cover crop before or just after the commercial crop. They help farmers enhance natural resources and produce more total biomass during the year. Crop residues protect the soil and increase organic restitution to the system. In 1999, a Franco-Brazilian collaborative project began scientific studies aimed at quantifying the impact of DMC, especially on the dynamics of water, carbon and nitrogen. DMC systems significantly decrease water runoff. In this way they effectively fight against soil erosion, even if additional infiltrated water can sometimes saturate the system and escape by drainage. The cover crop can then recycle some of that drainage loss and protect and use water resources better throughout the year. DMC systems also provide more favourable conditions that ensure the more intensive and more regular mineralisation of soil organic matter during the rainy season. Some of the organic mulch mineralises at the same time, providing the commercial crop with the benefit of a higher pool of inorganic nitrogen. The additional cover crop can recycle part of the nitrogen not used by the commercial crop and some of the nitrogen mineralised before or after this commercial cycle. Under DMC high microbial activity is responsible for higher CO2 emissions to the atmosphere, but the soil carbon balance is nonetheless positive because of the large biomass production and organic input from the introduction of the cover crop. Even under the hot and humid conditions of the cerrados, soil carbon content increases under the more productive DMC systems. Made available in DSpace on 2020-01-20T18:03:46Z (GMT). No. of bitstreams: 1 CNPAF2005ce.pdf: 100999 bytes, checksum: cbf49f449bd9181181fdc4f26010e424 (MD5) Previous issue date: 2005

Published
2005

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