Abstract
Performance of salt tolerant mutant rhizobia inoculation with graded levels of nitrogen on the growth and yield attributes of groundnut (arachis hypogaea l.)
Highlights
India is blessed with the agro-ecological condition favourable for growing nine major oil seeds including seven edible oilseeds, namely groundnut, rapeseed-mustard, soybean, sunflower, sesame and niger and two non-edible sources, namely castor and linseed, apart from a wide range of other minor oilseeds and oil-bearing tree species
Three Bradyrhizobium strain GNBJ-9M was obtained from the groundnut plant used for experimentations
The treatment T8- GNBJ-9M + 100% N recorded the maximum plant height at harvest of 50.60 cm followed by T7-GNBJ9M+75% N and other treatments respectively
Summary
India is blessed with the agro-ecological condition favourable for growing nine major oil seeds including seven edible oilseeds, namely groundnut, rapeseed-mustard, soybean, sunflower, sesame and niger and two non-edible sources, namely castor and linseed, apart from a wide range of other minor oilseeds and oil-bearing tree species. Among all the oil seed crops, groundnut occupies the first place in India accounting for more than 28% of acreage and 32% of production in the country (Anonymous, 2004). It has been reported that low yield in groundnut is probably due to low nodulation due to competition from strains in the soil which are ineffective with this host. Nodules formed by the native strains may not be able to fix sufficient nitrogen to meet the demand of the plant. Joshi et al (1989) reported that the Rhizobium inoculant has a favorable effect on legumes in groundnut. This inoculant helps to meet the additional nitrogen demand of the plant, by increasing nodulation, enabling realization of the yield potential of the plant
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