Chemical and biological properties of wheat soil in response to paddy straw incorporation and its biodegradation by fungal inoculants.
A field experiment was conducted to evaluate the relative contribution of organic fertilizers (paddy straw, microbial inoculants and vermicompost) and inorganic fertilizers (urea and superphosphate) in improving pH, C, N, humus, microbial biomass, dehydrogenase, phosphatase, cellulase, beta-glucosidase and xylanase activities of soil under wheat crop. Vermicompost fertilization resulted in highest microbial biomass, available phosphorus, and nitrogen content of wheat soil. It was also found effective in minimizing the alkalinity of soil compared to other treatments as indicated by pH change. However incorporation of paddy straw in conjunction with N(60)P(60) and T. reesei inoculation resulted in maximum dehydrogenase, alkaline phosphatase and highest humus content of soil. Mixed inoculation of A. awamori and T. reesei did not prove effective in improving the soil biochemical properties in comparison to single inoculation of T. reesei. Results showed that in situ incorporation of paddy straw in combination with N(60)P(60) and T. reesei inoculation can be used as an effective measure for valuable disposal of paddy straw and to improve the soil health by reducing mineral fertilization.
Gaind
Sunita
S
Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India.
Nain
Lata
L
D000469:Alkaline Phosphatase / Q000378:metabolism; D001230:Aspergillus / Q000378:metabolism*; D002480:Cellulase / Q000378:metabolism; D043364:Endo-1,4-beta Xylanases / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D018547:Plant Stems / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000032:analysis*; D014242:Trichoderma / Q000378:metabolism*; D014908:Triticum / Q000737:chemistry / Q000378:metabolism*; D001616:beta-Galactosidase / Q000378:metabolism
D012987:Soil; D010758:Phosphorus; D010088:Oxidoreductases; D000469:Alkaline Phosphatase; D001616:beta-Galactosidase; D002480:Cellulase; D043364:Endo-1,4-beta Xylanases