Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Interaction of water and nitrogen in relation to growth and yield of rabi grain sorghum.

Auteur : Ravi Kumar, S

Etablissement de soutenance : College of Agriculture (Rajendranagar)

Grade : PhD thesis (1995)

Résumé
A new resource capture model, RESCAP, (Monteith, in press), places equal emphasis on the role of leaves in relation to the interception of light and to the role 3 of roots in relation to the uptake of water. A central feature of the model is the comparison each day beiween the accumulated extractable water and the net decrease of soil water content since the start of growth. If the demand in the plant system is met from the available soil water then dry matter production is a function of intercepted light (light-limited), but if the demand exceeds supply, the rate of transpiration reverts to total potential extraction by the root system (water-limited). Post rainy season provides excellent conditions to validate a crop model and this study entitled "Interaction of water and nitrogen in relation to growth and yield of rabi grain sorghum" was framed to achieve the following objectives :

Présentation ICRISAT

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