Light interception as a source of variation for nitrogen fixation in groundnut genotypes

Williams, J H and Dutta, M and Nambiar, P T C (1990) Light interception as a source of variation for nitrogen fixation in groundnut genotypes. Plant and Soil, 121 (1). pp. 83-88. ISSN 0032-079X

[img] PDF - Published Version
Restricted to ICRISAT users only

Download (487kB) | Request a copy


A range of groundnut (Arachis hypogaea L.) genotypes, representing the cultivated botanical groups, were grown at ICRISAT Center, India. In 3 experiments, 3–8 genotypes were grown at various plant-population densities. In a fourth experiment, 27 genotypes were grown at a constant spacing. Acetylene reduction (AR) and fractional light interception (f) by these cultivars were measured at several stages of crop growth. Plant population (density), sample date and genotype influenced both the AR rate m-2 and the fraction of light intercepted; variables that were well correlated. In 3 experiments, ca. 90% of the statistical variation in AR rate m-2 was attributed to variations in f. In the remaining experiment, genotypic variance was 46% of the explained variance; one genotype (Gangapuri) had consistently low AR across the range of populations, however in the other experiments Gangapuri did not differ from other cultivars in AR/f, when sampled at earlier stages of development

Item Type: Article
Uncontrolled Keywords: acetylene reduction - Arachis hypogaea - genotypes - light - light interception - nitrogen fixation
Subjects: Mandate crops > Groundnut
Depositing User: Ms K Syamalamba
Date Deposited: 17 Nov 2011 10:19
Last Modified: 14 Sep 2013 13:26
Official URL:
Acknowledgement: Use of a trade name does not imply endorsement of this product over others of a similar nature. We wish to thank B Srinivas Rao and A Viswanath for their assistance in these experiments
View Statistics

Actions (login required)

View Item View Item