Journal of Pure and Applied MicrobiologyVol. 9 No. Special Edition Nov. 2015

Field Response of L-Amino acid Micro-Mineral Complex (AAMMC) on Soybean Rhizobium Symbiosis

Tarun Kumar Kevat, S.B. Gupta*, Tapas Chowdhury, Derheen Bai, Diptimayee Dash and R. Soni

Department of Agriculture, Microbiology IGKV Raipur - 492 012 India.

Received on 06 May 2015 and accepted on 03 July 2015

 

ABSTRACT

A field experiment was conducted to evaluate the response of L-amino acid micro-mineral complex (AAMMC) on soybean Rhizobium symbiosis at instructional cum research farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) with six treatments of different combinations (T1-T6) including control. Data revealed that treatment with recommended dose of fertilizers showed highest value among all the parameters followed by T3 i.e. foliar application of AAMMC @1L/ha 1st spray at 20-25 DAS and 2nd spray at 3-4 days before flower initiation. This treatment has highest number of effective nodules (54.5/plant), total N uptake (192.27 kg/ha) and grain yield (25.68 q/ha). However, maximum bacterial population (5?104 per g soil) and rhizobial population (4.59?104 per g soil) were observed in case of T4 i.e. foliar application of L-amino acid micro-mineral complex @1L/ha 1st spray at 20-25 DAS and 2nd spray at 3-4 days before flower initiation. The treatment T4 also showed maximum dehydrogenase activity (61 ?g TPF/h/g soil) at 50% flowering stage which might be due to the highest microbial population.

Keywords : Soybean, Amino acid, Micro-mineral complex, foliar spray.