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Agro-Science
Journal of Tropical Agriculture, Food, Environment and Extension
 

ISSN 1119-7455
   
 
         
 
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Article No 4 of Volume 6.1 (2007)
 
    
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ASSESSMENT OF BIOLOGICAL NITROGEN FIXING POTENTIALS OF PIGEONPEA GENOTYPES INTERCROPPED WITH SORGHUM FOR SOIL FERTILITY IMPROVEMENT IN SOUTHERN GUINEA SAVANNA OF NIGERIA.

Egbe, O.M.

Department of Plant Breeding and Seed Science University of  Agriculture, Makurdi

 ABSTRACT

In a 2-year field/laboratory study, the biological nitrogen fixing potentials of 14 newly introduced pigeonpea (Cajanus cajan (L.) Millsp.) genotypes from ICRISAT along with a local check were assessed under intercropping with sorghum (Sorghum bicolour (L.) Moench.) in Southern Guinea Savanna of Nigeria.  Using sorghum as the non-fixing control and N-difference method, estimates of fixed N in pigeonpea genotypes of different maturity ratings ranged from 37.52kg/ha to 164.82kg/ha under intercropping.  The average total nitrogen concentration of shoot in intercropped pigeonpea genotypes at harvest (2.83%) was higher than that for intercropped sorghum (1.83%). There were very little differences between sole cropping and intercropping in total soil N for each of the crops in the intercrop combinations in both years.

 

Key words: biological nitrogen fixation, intercropping, pigeonpea, genotypes, sorghum.

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Date:17/01/2018
 
     
 
 
 
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