Journal of Pure and Applied MicrobiologyVol. 9 No. 2

Effect of Biochar Along with Plant Growth Promoting Rhizobacteria (PGPR) on Growth and Total Dry Matter Yield of Rice

Awtar Singh, A. P. Singh, S.K. Singh and C.M. Singh

Department of Soil Science & Agricultural Chemistry, Institute of Agricultural Sciences Banaras Hindu University, Varanasi - 221005, India.

Received on 09 October 2014 and accepted on 12 December 2014

 

ABSTRACT

A pot experiment was conducted to investigate the effect of rice husk biochar and PGPR on growth and total dry matter yield of rice, in alluvial soil at Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences B.H.U., Varanasi, India during kharif season of 2012. The soil used in pot experiment was sandy loam with bulk density 1.63 Mgm-3, pH 7.6, E.C. 0.21 dsm-1, CEC 11.63 cmol(P+) kg-1, organic carbon 0.34%, available soil N 135 kg ha-1, available P 22.7 kg ha-1 and available K 183.5 kg ha-1. The characteristics of biochar were bulk density 0.40 Mgm-3, particle density 1.40 Mgm-3 , pH (1:5) 10, porosity 71.42%, water holding capacity 218%, total carbon 45.60%, organic carbon 4.80%, N 0.1%, P 0.15%, K 0.20%, Ca + Mg 0.21% and Na 0.35%. The PGPR used for experimentation included Pseudomonas aeruginosa, Azotobacter chroococcum and Azospirillum brasilense. The experiment was designed as a factorial completely randomized design (FCRD) with three replicates. The treatments comprises four levels of biochar (i.e. 0, 1.8, 3.6 and 7.2 g kg-1 soil), two levels of PGPR (uninoculated and inoculated ) and two levels of N, P, K and Zn fertilizers (100% and 75% of RDF). Application of full doses of fertilizers (100% RDF) resulted in significantly (P< 0.05) higher growth and total dry matter yield of rice over 75% RDF. Sole and combined application of biochar along with RDF resulted in non significant effect on growth and yield of rice. Combined application of biochar 3.6 g kg -1 soil along with PGPR (biochar?PGPR) was produced significantly highest growth and total dry matter yield of rice. Inoculation with PGPR also resulted in significantly higher growth and total dry matter yield of rice over uninoculated level.

Keywords : Biochar, Total dry matter yield, rice.