NDLI: Contribution of biological nitrogen fixation to Elephant grass (Pennisetum purpureum Schum.)

Content Provider	Springer Nature Link
Author	Morais, Rafael F. Quesada, Diego M. Reis, Veronica M. Urquiaga, Segundo Alves, Bru J. R. Boddey, Robert M.
Copyright Year	2011
Abstract	Because of its high dry matter (DM) productivity, elephant grass (Pennisetum purpureum) is an ideal candidate for biomass production for biofuel production if low N fertilizer rates are used to avoid high fossil fuel inputs. The objective of this study was to investigate the potential of different elephant grass genotypes to obtain contributions of plant-associated biological N$_{2}$ fixation (BNF).Three field experiments with 4 or 5 different genotypes were conducted on low-fertility Acrisols, two in Rio de Janeiro State and one in Espirito Santo for the evaluation of DM and N accumulation and $^{15}$N abundance.DM and N accumulation rates of four genotypes in the two experiments in Rio State stabilized at high levels after 2 years of growth. In all experiments the spontaneously-occurring weeds in the plots were significantly higher in $^{15}$N abundance than the elephant grass genotypes. The lower $^{15}$N abundance of the elephant grass was shown not to be due to lower δ$^{15}$N abundance at depth in the soil.Four of the grass genotypes obtained between 18 and 70% of their N from BNF amounting to inputs of between 36 and 132 kg N ha$^{−1}$ yr$^{−1}$.
Starting Page	23
Ending Page	34
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	356
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-09-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	N natural abundance Bioenergy crop Elephant grass genotypes N$_{2}$ fixation N accumulation Pennisetum purpureum Ecology Soil Science & Conservation Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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