Dinâmica da agua nas palhadas de milho, milheto e soja utilizadas em plantio direto

Macena Da Silva Fernando-Antonio, Silveira Pinto Hilton, Scopel Eric, Corbeels Marc, Affholder François. 2006. Dinâmica da agua nas palhadas de milho, milheto e soja utilizadas em plantio direto. Pesquisa Agropecuária Brasileira, 41 (5) : 717-724.

Titre anglais : Water fluxes in maize, millet and soybean plant-residue mulches used in direct seeding

Résumé : The objective of this work was to evaluate the effects of crop residue mulches from maize, millet and soybean on water storage capacity, water evaporation, soil cover, solar radiation interception and surface water run-off as well as to incorporate these effects in a crop growth model. The mulch of millet and maize presented higher capacity for water storage than soybean mulch: 3.26, 3.24 and 2.62 g of water per gram of dry matter, respectively. Water losses from wet mulches were related to the potential evapotranspiration. The soil cover levels were similar among the three types of material. The three types of mulch intercepted similar quantities of photosynthetically active radiation and infrared radiation. The mulch of maize straw was slightly more efficient in intercepting radiation than that from millet or soybean. Mulching with millet residues was efficient in the control of surface water run-off: only 45.5 mm of water (out of 843.5 mm rainfall) was lost through runoff under the no-till system with millet as cover crop, whereas 222.5 mm of water was lost in the conventional system with tillage. Most of the relations derived in this work could be described by exponential models.

Classification Agris : F07 - Façons culturales

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Macena Da Silva Fernando-Antonio, EMBRAPA (BRA)
• Silveira Pinto Hilton, UNICAMP (BRA)
• Scopel Eric, CIRAD-CP-UMR SYSTEM (BRA) ORCID: 0000-0003-2938-6587
• Corbeels Marc, CIRAD-CP-UMR SYSTEM (BRA)
• Affholder François, CIRAD-CP-UMR SYSTEM (FRA) ORCID: 0000-0002-3919-4805

Source : Cirad - Agritrop (https://agritrop.cirad.fr/535633/)

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