NDLI: Application of $^{15}$N natural abundance technique for evaluating biological nitrogen fixation in oil palm ecotypes at nursery stage in pot experiments and at mature plantation sites

Content Provider	Springer Nature Link
Author	Carvalho, André L. V. Alves, Bru J. R. Baldani, Vera L. D. Reis, Veronica M.
Copyright Year	2007
Abstract	A range of different species of diazotrophic bacteria has been found in tissues and the rhizosphere of oil palm plants, suggesting a potential to benefit from biological nitrogen fixation (BNF). A few studies have confirmed that plantlets at nursery stage can benefit significantly from BNF after inoculation with Azospirillum spp. but no data are available regarding the benefit from naturally-occurring diazotrophic bacteria in oil palm. The results described here were derived from two pot trials laid out under controlled conditions with plantlets from two important regions for palm oil production in Brazil, as well as from different field sites of mature oil palm plantations. The $^{15}$N natural abundance technique was employed to estimate plant dependence on BNF (%Ndfa) by the different ecotypes grown in soil and previously characterized as hosting diazotrophic bacteria. From both pot trials it was possible to identify some ecotypes of high potential for N$_{2}$-fixation that reached in some cases approximately 50%Ndfa. However, the accuracy of measurement still needs to be improved using more suitable reference plants for pot experiments. Values of δ $^{15}$N signals from oil palm and reference plants in the field were inconclusive concerning any benefit from BNF to oil palm, owing to apparently high temporal and spatial variability of δ $^{15}$N of the plant-available N in the heterogeneous soil matrix for the different palm and reference plant tested.
Starting Page	71
Ending Page	78
Page Count	8
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	302
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-11-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Elaeis guineensis E. oleifera N$_{2}$-fixation Delta $^{15}$N technique Ecology Plant Physiology Soil Science & Conservation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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