Effects of drought on characters related to nitrogen fixation in peanut

Pimratch, S. and Jogloy, S. and Vorasoot, N. and Toomsan, B. and Kesmala, T. and Patanothai, A. and Holbrook, C.C. (2010) Effects of drought on characters related to nitrogen fixation in peanut. Asian Journal of Plant Sciences, 9 (7). pp. 402-413.

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Abstract

Twelve peanut genotypes were tested under three water regimes in two greenhouses to investigate the effects of drought on biomass production and N2 fixation. Drought reduced biomass production from 36.5 to 56.0% and reduced nitrogen fixation from 26.8 to 68.8%. Most genotypes with high biomass production under Field Capacity (FC) had high reduction in biomass production under drought conditions, but fewer genotypes with high N2 fixed under FC showed high reduction in N2 fixed. Biomass production under FC in general gave more contribution to biomass production under drought conditions than did the reduction. N2 fixed under FC and the reduction in N2 fixed contributed similarly to N2 fixed under drought conditions. Positive and significant correlations between N2 fixed and biomass production were found at FC and 2/3 available soil water (AW), but the correlation was not significant at 1/3 AW. Tifton-8 was the best genotype for high N2 fixed under FC and KK 60-3 was the best genotype for low reduction. Correlations between N2 fixed and nodule dry weight and shoot dry weight were high and consistent across water regimes. This information is important for breeders to develop peanut cultivars with reasonably high nitrogen fixation under drought conditions

Item Type: Article
Author Affiliation: Department of Plant Science and Agricultural Resources, Faculty of Agriculture Khon Kaen University Khon Kaen 40002, Thailand
Subjects: Atmosperic Science > Climatology
Divisions: Groundnut
Depositing User: Mr T L Gautham
Date Deposited: 09 Jan 2011 20:19
Last Modified: 09 Jan 2011 20:19
Official URL: http://scialert.net/qredirect.php?doi=ajps.2010.40...
URI: http://eprints.icrisat.ac.in/id/eprint/1292

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