|Author:||Nautiyal, P. C. ; Ravindra, V. ; Joshi, Y. C.|
|Book Group Author:||NA|
The study aimed at improving the conventional irrigation management practices to enhance yield and water use efficiency in groundnut. Field experiment was conducted during two summer seasons to assess total biomass, pod yield, harvest index (HI), and field water use efficiency (Ef) under water-deficit during various growth stages in four groundnut (Arachis hypogaea L. ssp. fastigiata) cultivars. Dry matter partitioning among various plant parts (excluding the root), and leaf area index (LAI) varied significantly under water deficit. More dry matter accumulated in petiole and stem under stress. Transient water-deficit in vegetative phase resulted in higher dry matter accumulation in reproductive parts (peg+pod). Water use efficiency (Ef) was, however, higher under prolonged stress during vegetative phase; though cultivars response varied. Per cent reduction in total biomass under stress during flowering (F), and pod-development (P) ranged between 6 and 25%, this reduction in total biomass was mainly due to the reduction in the pod mass rather than in the vegetative mass. Water-deficit occurring during the vegetative stage, seedling stage until flowering, was most beneficial for the crop, and need to be utilized in irrigation scheduling.
|Pages:||135 - 139|
|Journal:||Indian Journal of Plant Physiology|
crop growth stage, crop yield, dry matter accumulation,groundnuts, leaf area index, petioles, plant development, plant waterrelations, roots, stems, water deficit, water use efficiency, Arachishypogaea, Arachis, Papilionoideae, Fabaceae, Fabales, dicotyledons,angiosperms, Spermatophyta, plants, eukaryotes, LAI, peanuts, FieldCrops (FF005) (New March 2000), Plant Water Relations (FF062), PlantProduction (FF100)