Journal of Pure and Applied MicrobiologyVol. 9 No. 4

Effect of Various Nutrient Management Practices on Soil Chemical and Biological Properties after Harvest of Different Traditional Paddy (Oryza sativa L.) Varieties

H. N. Gagandeep1, C. Sunil 2 and 3Pradeep Gopakkali

1M.Sc. (Agri.) Department of Agronomy, 2Assistant professor of Agronomy, 3Technical Officer, Department of Agronomy, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India.

Received on 20 May 2015 and accepted on 15 August 2015



A field experiment was conducted during kharif 2014 in red gravely loam soil at AHRS, Honnavile, Shivamogga to study the effect of different nutrient management practices on soil chemical and biological properties after harvest of traditional Paddy varieties. The experiment was laid out in a Randomized Complete Block Design (Factorial concept) with four varieties and four different nutrient management practices with three replications. Among the different varieties, significantly higher soil available nitrogen (246.7 kg ha-1), phosphorus (29.5 kg ha-1) and potassium (219.8 kg ha-1) was recorded with variety Mysore mallige. However, significantly higher microbial population (66.58 X 106 CFU g-1 soil, 12.25 X 104 CFU g-1 soil and 13.16 X 104 CFU g-1 soil of total bacteria, fungi and actinomycetes respectively) was recorded with variety JGL-1798. Among the different nutrient management practices, application of Rec. FYM + 100 % Rec. N equivalent through organics recorded significantly higher available nitrogen (239.9 kg ha-1), phosphorus (26.7 kg ha-1) and potassium (212.3 kg ha-1), total bacteria (62.66 X 106 CFU g-1 soil), fungi (9.33 X 104 CFU g-1 soil) and actinomycetes (11.08 X 104 CFU g-1 soil) in soil after harvest of different paddy varieties.

Keywords : Actinomycetes, Bacteria, Grain yield, Nitrogen, Potassium.