AURIFERE
PORTAIL DOCUMENTAIRE DE L'INSTITUT SENEGALAIS DE RECHERCHES AGRICOLES
Elaboré par
L’Unité d’Information et de Valorisation des Résultats de la Recherche (UNIVAL)
'Un Accès Unique aux Ressources d’Information
et aux Fonds documentaires pour une Recherche d’Excellence
'
A partir de cette page vous pouvez :
/ Abdoulaye Badiane
Natural science, Vol.4, n°12. Effects of different inputs of organic matter on the response of plant production to a soil water stress in Sahelian region [texte imprimé] / Abdoulaye Badiane, Auteur ; Ndèye Yacine Badiane, Auteur ; Fatou Guèye, Auteur ; Saliou Faye, Auteur ; I. Ndoye, Auteur ; Dominique Masse, Auteur . - Delaware (USA) : Scientific Research Publishing Inc, 2012 . - pp. 969-975. Langues : Anglais ( eng) Catégories : | RESSOURCES NATURELLES ET ENVIRONNEMENT
| Mots-clés : | Matière organique, stress hydrique, Humidité volumétrique du sol, Conductance stomatique, Indice de surface foliaire | Index. décimale : | P355-Fertilisation du sol. Besoins en engrais et amendement. Alimentation minérale des plantes. Réponse des plantes | Résumé : | The aim was to study the effects of organic management like the application of organic mat- ters on crop production. This research is placed in the context of climate change impact mitiga- tion. A field experiment was conducted during the dry season. Rainfall inputs were simulated by irrigation to study the effects of water stress during the flowering period of a grain on the agronomic and the physiological behavior of the plant. The measurements were made on the vol- umetric soil moisture, stomatal conductance, and leaf area index (LAI), grain yield, straw and weight of 100 grains. The water use efficiency (WUE) and yield losses were evaluated. The re-sults of the volumetric soil moisture showed that the use of localized input under water stress (STR-T1) recorded the lowest moisture in the surface horizons. Treatment with localized input under water stress with or without fertilization (STR-T1, STR-T1 + N) showed an ability of sto- matal regulation compared to the control (STR- T0) and the input application by spreading (STR- T2). (STR-T1 + N) has initiated an early stomatal closure of the plant because of the effect of ni-trogen. However, despite a more pronounced water stress with stomatal closure, the LAI and the grain yield were greater with (STR-T1) and (STR-T1 + N). The results showed that the inputs of localized organic fertilization with or without nitrogen grain yields were the highest regard-less of the hydric regime applied. However the losses of grain yield were higher in treatments with organic inputs in spreading and localized under water stress. The WUE by the crop was reduced compared to the control with organic inputs under STR. In this study we show that the use of organic matter increases de farmers risk and this notion of risk is high and it is necessary to consider this risk in the proposals of techni- cal innovations. | En ligne : | http://file.scirp.org/pdf/NS20121200001_37713129.pdf | Format de la ressource électronique : | PDF |
|
Exemplaires
Disponibilité |
---|
CD16000023 | P355-BAD | Publication | CRA/Djibélor | Rayons | Exclu du prêt |
Documents numériques
Cliquer pour le pdfURL | | |