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Research Journal of Environmental Sciences

Year: 2009  |  Volume: 3  |  Issue: 4  |  Page No.: 448 - 455

Effects of Nitrogen Application on Growth of Irrigated Chickpea (Cicer arietinum L.) under Drought Stress in Hydroponics Condition

N. Bahavar, A. Ebadi, A. Tobeh and Sh. Jamaati-e-Somarin

Abstract

To study the effects of N application on growth and biomass of a local variety (cv. Kabouli) of chickpea under water deficit, a study was carried out hydroponically in growth chamber using three concentrations of N (0.25, 0.5 and 1 Mm) and four levels of drought stress (0, -0.3, -0.6 and -0.9 MPa) in three replications in the form of a completely random block design in 2007, Ardebil, under the Iran conditions. Water deficit stress were evaluated for leaf water content, leaf water potential, membrane stability index, chlorophyll content, leaf area, root area, root/shoot ratio, nodule water content, nodule number and biomass. According to observed data, N application was increased the leaf water content, membrane stability, chlorophyll, leaf water potential, leaf area, nodule water content, nodule number and biomass. The experiment showed that N fertilizer application (with a concentration of 1 Mm) can increase leaf and nodule Relative Water Content (RWC), leaf water potential, membrane stability index, leaf chlorophyll content, leaf area and biomass under water deficit condition. Therefore, it seems that mineral nitrogen application can mitigate the adverse effects of water deficit stress and improve growth and biomass in chickpea. Consequently, nitrogen application after moisture stress decrease negative effects drought.

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