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Root-Associated Nitrogen Fixation in Finger Millet

OAR@ICRISAT

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Relation http://oar.icrisat.org/3899/
 
Title Root-Associated Nitrogen Fixation in Finger Millet
 
Creator Upadhyaya, M N
Hegde, S V
Rai, P V
Wani, S P
 
Subject Millets
 
Description 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
 
Date 1986
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/3899/1/Root_associated_nitrogen_fixaton_in_Finger_Miller_MNU%2CSVH_PVR_SPW_1984.pdf
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.