Influence of water deficits on phenology, growth and dry matter allocation in chickpea (Cicer arietinum)

Singh, Piara (1991) Influence of water deficits on phenology, growth and dry matter allocation in chickpea (Cicer arietinum). Field Crops Research, 28 (1-2). pp. 1-15.

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Abstract

Field experiments were conducted to study the influence of water-deficits on phenology, growth and DM allocation in chickpeas cv. JG74. The crop was subjected to increasing intensities of water deficits during vegetative and reproductive phases by applying gradient irrigations. Durations of emergence to flowering (E-FL), flowering to beginning of pod-filling (FL-BPF), and beginning of pod-filling to physiological maturity (BPF-PM) were inversely correlated with normalized evapotranspiration deficit (Et-deficit) experienced by the crop during a growth period. In terms of thermal time (base temperature = 8°C, ceiling temperature = 30°), the durations of E-Fl, FL-BPF, and BPF-PM phases decreased by 4.5, 3.1, and 3.8°d for each mm/kPa of normalized Et-deficit, respectively. Water-deficits before flowering decreased canopy development, light interception and DM production more than stress after flowering. Water deficit before pod-initiation did not influence the allocation of DM between leaves and branches, but water-deficit during the reproductive phase increased allocation to the reproductive organs. Normalized Et-deficit of 1 mm/kPa increased allocation to the pods by 0.75% of the biomass produced after pod-initiation and to the seeds by 0.52% of the biomass produced after BPF. It is concluded that the influence of water stress on phenology, growth and DM allocation in chickpea in addition to other environmental factors affecting these processes need to be considered

Item Type: Article
Author Affiliation: Resource Management Program, ICRISAT, Patancheru 502324, Andhra Pradesh, India
Subjects: Crop Improvement
Divisions: Chickpea
Depositing User: Mr B Krishnamurthy
Date Deposited: 03 Feb 2011 23:02
Last Modified: 03 Feb 2011 23:02
Official URL: http://dx.doi.org/10.1016/0378-4290(91)90070-C
URI: http://eprints.icrisat.ac.in/id/eprint/1470

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