Root-Associated Nitrogen Fixation in Finger Millet

Upadhyaya, M N and Hegde, S V and Rai, P V and Wani, S P (1986) Root-Associated Nitrogen Fixation in Finger Millet. In: Cereal Nitrogen Fixation. Proceedings of the Working Group Meeting on cereal nitrogen fixation, 9‑12 October 1984, ICRISAT Patancheru, Andhra Pradesh, India.

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Abstract

This paper presents the results of investigations carried out on some aspects of root-associated nitrogen fixation in finger millet(Eleucine coracana Gaertn). Soil-root nitrogenase assay of 53 finger millet cultivars belonging to four maturity groups indicated (1) low levels of nitrogenase activity,(2) high plant-to-plant variability,(3) high variability between cultivars,(4) higher activity in hybrids over pure lines,(5) higher activity in medium-maturity group over early-or late-maturity groups, and (6) no apparent relationship between nitrogenase activity and dry- matter production. Nitrogenase activity of finger millet soil-root system was further affected by plant age, soil moisture, and diurnal changes. All cultivars had highest diazotroph counts during the reproductive stage in root-adhering soil, root wash, and unsterilized root macerate. The root-associated nitrogen fixers were species of Pseudomonas and Enterobacter. Inoculation of finger millet cultivar Indaf 7, with NBRE and SRI diazotroph cultures, increased above-ground yields and N uptake over the control in the greenhouse, but not in the field. Nitrogen-balance study with inoculation and three levels of applied nitrogen showed a net gain equivalent to 63-9.4 kg N ha-1 from inoculation

Item Type:	Conference or Workshop Item (Paper)
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Mandate crops > Millets
Depositing User:	Mr Sanat Kumar Behera
Date Deposited:	11 Nov 2011 08:09
Last Modified:	11 Nov 2011 08:09
URI:	http://oar.icrisat.org/id/eprint/3899
Acknowledgement:	UNSPECIFIED
Links:	Author

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