Rock phosphate enriched post-methanation bio-sludge from kitchen waste based biogas plant as P source for mungbean and its effect on rhizosphere phosphatase activity

• Published in: European journal of soil biology Vol. 47; no. 3; pp. 205 - 212
• Main Authors: Shrivastava, Manoj, Kale, Sharad P., D’Souza, S.F.
• Format: Journal Article
• Language: English
• Published: Paris Elsevier Masson SAS 01.05.2011; Elsevier
• Subjects: 32P isotope dilution; Agronomy. Soil science and plant productions; Aspergillus niger; Biochemistry and biology; biogas; Biological and medical sciences; Chemical, physicochemical, biochemical and biological properties; Fundamental and applied biological sciences. Psychology; fungi; greenhouses; kitchen waste; mung beans; Penicillium oxalicum; Phosphatase activity; phosphorus fertilizers; Physics, chemistry, biochemistry and biology of agricultural and forest soils; population growth; Post methanation bio-sludge; Relative agronomic efficiency; rhizosphere; Rock phosphate; sludge; Soil science; solubilization; Rock phosphate; 32P isotope dilution; Phosphatase activity; Post methanation bio-sludge; Relative agronomic efficiency; Organic waste; Phosphoric monoester hydrolases; Esterases; Relative efficiency; Anaerobic digestion; P isotope dilution; Mung bean; Food waste; Enzymatic activity; Agronomy; Phosphate rock; Methanogenesis; Soil science; Phosphorus Isotopes; Sewage digester; Radiolabelling; Enzyme; Isotope dilution; Biogas; Rhizosphere; Hydrolases
• ISSN: 1164-5563
• DOI: 10.1016/j.ejsobi.2011.02.002

Post methanation bio-sludge from a biphasic (aerobic and anaerobic) biogas plant, low grade Indian rock phosphate and two phosphate solubilizing fungi viz., Aspergillus niger TMPS1 and Penicillium oxalicum TMPS3 have been tested for the production of phosphate enriched manure (PEM). A laboratory study revealed that one month incubation was long enough to produce good quality organic P fertilizers having higher water soluble P, lower C:P ratio, higher population of phosphate solubilizing microorganisms and higher phosphatase activity in comparison to biogas sludge. The relative agronomic efficiency of these products was evaluated under greenhouse conditions for mungbean using a 32P radiotracer technique. Relative agronomic efficiencies of phosphate enriched manures inoculated with phosphate solubilizing fungi were better than un-inoculated phosphate enriched manure and equal to single super phosphate (SSP). A significant increase in the population of rhizosphere phosphate solubilizing microorganisms and phosphatase activity was observed in phosphate enriched manure treatments. ► Development of phosphatic bio-fertilizer using post-methanation bio-sludge from kitchen waste based biogas plant, low-grade rock phosphate and phosphate solubilizing fungi. ► Evaluation of agronomic efficiency of these biofertiliers under greenhouse condition using 32P radiotracer technique. ► Evaluation of the effect of these biofertilizers on soil biological properties including rhizosphere phosphatase activity and PSM population.