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Asian Journal of Plant Sciences
  Year: 2007 | Volume: 6 | Issue: 7 | Page No.: 1113-1118
DOI: 10.3923/ajps.2007.1113.1118
Effect of Rhizobia Inoculation and Starter-N on Nodulation, Shoot Biomass and Yield of Grain Legumes
George N. Chemining`wa , J.W. Muthomi and S.W.M. Theuri

Abstract:
A study was conducted in Kenya at the University of Nairobi’s Field Station in 2004 long and short rains to determine the effect of rhizobia inoculation and starter-N on nodulation, shoot biomass and yield of selected grain legumes. Common bean (Phaseolus vulgaris L.), lima bean (Phaseolus lunatus L.), cowpea (Vigna unguiculata L.), green gram (Vigna radiata L.), pigeon pea (Cajanus cajan L.) and lablab (Lablab purpureus L.) were uninoculated, inoculated with appropriate rhizobia, or supplied with 26 kg N ha-1 as starter-N. Rhizobia inoculation had no effect on nodule numbers in both seasons. Starter-N suppressed nodule numbers only in the long rains at 4 weeks after emergence. In general, common bean had higher nodule numbers and nodule biomass than other legumes while lima bean registered fewest nodules. Rhizobia inoculation improved nodule biomass in short rains at 6 weeks after emergence, while starter-N had no effect on nodule biomass in both seasons. Inoculation and starter-N had no effect on shoot biomass and grain yield in both seasons. Lablab, common bean and lima bean had higher shoot biomass than other legumes in both seasons. In long rains, lima bean produced highest grain yield followed by common bean while the converse was the case in short rains. Pigeon pea and green gram performed poorest in short rains. It was concluded that it might not be necessary to inoculate or apply starter-N to legumes under soil conditions prevailing in the current study.
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How to cite this article:

George N. Chemining`wa , J.W. Muthomi and S.W.M. Theuri , 2007. Effect of Rhizobia Inoculation and Starter-N on Nodulation, Shoot Biomass and Yield of Grain Legumes. Asian Journal of Plant Sciences, 6: 1113-1118.

DOI: 10.3923/ajps.2007.1113.1118

URL: https://scialert.net/abstract/?doi=ajps.2007.1113.1118

 
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