Effect of Rhizobium inoculation and soil applied indole acetic acidon growth, nodulation and yield of mung bean (Vigna radiata L.)
2004
Yousaf, S. | Akhtar, M.J. | Raza, W. | Khalid, A. | Arshad, M.,Universityof Agriculture, Faisalabad (Pakistan). Inst. of Soil and EnvironmentalSciences
A pot experiment was conducted to study the effect of Rhizobiuminoculation alone and in combination with different levels of indolesacetic acid (IAA) on growth, nodulation and yield of mung bean.Surface disinfected seeds of mung bean (Vigna radiata L.) inoculatedwith 3- day-old culture of Rhizobium japonicum (mixed with peat) weresown in soil filled pots. After germination and thinning, variousconcentrations (10-3 to 10- 7 M) of IAA were applied to soil in the formof solution. Uninoculated / untreated control was kept for comparison.Results revealed that although Rhizobium inoculation exerted positiveeffect on growth and yield of mung bean; combined application ofRhizobium and IAA showed more promising results and significantlyincreased root length (up to 42.6%), oven dry root (up to 60%) andshoot weight (up to 47.2%), No. of pods (up to 71.4%), grain yield (upto 84%) and 100-grain weight (up to 47.5%) compared to control.Moreover, lower concentration (10-6 M) of IAA was found to be themost effective in enhancing the growth and yield of mung bean. Thisconcentration significantly increased the number (up to 87.5%) andweight (up to 90.7%) of nodules, N content (up to 42.9%) and uptake(up to 106%) in grain compared to control and inoculation alone. Thesefindings imply that amendment of soil with suitable concentration (10-5to 10-7 M) of IAA along with Rhizobium inoculation could promotenodulation, growth and yield of mung bean.
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