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Agronomy 2016, 6(1), 11; doi:10.3390/agronomy6010011

Symbiotic Efficiency of Native and Exotic Rhizobium Strains Nodulating Lentil (Lens culinaris Medik.) in Soils of Southern Ethiopia

1
School of Plant and Horticultural Sciences, Hawassa University, P.O. Box 05, Hawassa, Ethiopia
2
Department of Plant Science, DebreBerhan University, P.O. Box 445, DebreBerhan, Ethiopia
3
International Livestock Research Institute, P.O.Box 5689, Addis Ababa, Ethiopia
4
Department of Soil Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Jerry H. Cherney
Received: 21 October 2015 / Revised: 26 January 2016 / Accepted: 2 February 2016 / Published: 17 February 2016
View Full-Text   |   Download PDF [224 KB, uploaded 17 February 2016]

Abstract

Lentil plays a major role in the food and nutritional security of low income Ethiopian families because of the high protein content of their seed; however, their productivity typically is low largely due to soil fertility limitations. Field and pot experiments were conducted during the 2011 cropping season to determine the effectiveness of Rhizobium strains on two cultivars of lentil in Southern Ethiopia. Six rhizobial inoculant treatments (four indigenous and two commercial inoculants), a nitrogen (N) fertilizer treatment (50 kg·urea·ha−1) and an absolute control (non-inoculated non-fertilized) were used. Inoculated plants produced significantly higher nodule number, nodule dry weight, grain yield and yield components than non-inoculated non-fertilized plants. Inoculation of field grown lentil with rhizobia strain Lt29 and Lt5 enhanced seed yield by 59% and 44%, respectively. Whereas urea fertilization enhanced yields by 40%. Similarly, grain yields were increased during the pot experiment by 92% and 67% over the control treatments by inoculation with Lt29 and Lt5, respectively. The highest levels of N fixation were achieved in plants inoculated with Lt29 (65.7% Ndfa). Both field and pot investigations indicate that inoculation of lentil with native rhizobial strains replace the need for inorganic N fertilization to optimize lentil yields. View Full-Text
Keywords: Lentil; N2 fixation; rhizobial inoculant; nodulation; fixed N Lentil; N2 fixation; rhizobial inoculant; nodulation; fixed N
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tena, W.; Wolde-Meskel, E.; Walley, F. Symbiotic Efficiency of Native and Exotic Rhizobium Strains Nodulating Lentil (Lens culinaris Medik.) in Soils of Southern Ethiopia. Agronomy 2016, 6, 11.

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