Nitrogen fixation associated with roots of sorghum and wheat

Klucas, R.V. and Pedersen, W. (1980) Nitrogen fixation associated with roots of sorghum and wheat. Nitrogen Fixation, 2. pp. 243-255.

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Abstract

In field trials at (a) Sidney and (b) Scottsbluff, Nebraska, seed of winter wheat cv. Scout 66 was inoculated with Erwinia herbicola, or soil from a wheat field in which Scout 66 had shown acetylene reduction activity or from native wheatgrass pasture was applied at 228 kg/ha. Number of crown roots and tillers, total forage yield, root wt. and grain yield were significantly higher at (b) than at (a) but did not differ between treatments at either site. Rates of acetylene reduction by soil-root cores or washed root segments were very low with no significant differences in treated areas. In a factorial site trial, 3 sorghum cv. received 0, 57 or 114 kg N and 0, 46 or 91 kg P/ha, with or without inoculation with E. herbicola or Klebsiella pneumoniae. There were significant differences in nitrogenase activity for all factors. N decreased nitrogenase activity in all 3 cv. and P increased it in cv. CK60B. Inoculation did not increase forage or grain yield or N content. The highest rates of N and P gave the highest forage and grain N contents. CK60A had the highest yield and N content. The fertilizer X inoculation interaction showed an increase in yield in response to bacterial inoculation. In a trial of 12 cv., roots of R-8193 and CK60B showed the most nitrogenase activity

Item Type:	Article
Author Affiliation:	Laboratory of Agricultural Biochemistry, Nebraska University, Lincoln, NE 68583, USA
Subjects:	Plant Production Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry
Divisions:	Sorghum
Depositing User:	Ms K Syamalamba
Date Deposited:	22 May 2012 08:43
Last Modified:	22 May 2012 08:44
URI:	http://eprints.icrisat.ac.in/id/eprint/5611

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