Effect of Distillery Effluent, Biomethanated Spent Wash, on Microbial Activity Parameters in Soil Under Rice–Wheat Cropping System

Autor: Sandeep Sharma, Jatinder Kaur, Hargopal Singh, Geetika Banta, Dinesh K. Benbi
Rok vydání: 2015
Předmět:
Zdroj: Proceedings of the National Academy of Sciences, India Section B: Biological Sciences. 87:467-475
ISSN: 2250-1746
0369-8211
DOI: 10.1007/s40011-015-0587-9
Popis: The study reports the effect of biomethanated spent wash on chemical and microbial properties of sandy loam soil. A field experiment was conducted to examine the effect of spent wash on biological soil health under rice–wheat cropping system. The soil was analysed for enzyme activity along with determination of microbial biomass and microbial quotient. The maximum fluorescein diacetate hydrolysis (7.09 μg fluorescein g−1 soil h−1), acid phosphatase (5.43 μg p-nitrophenol g−1 soil h−1), alkaline phosphatase (4.57 μg p-nitrophenol g−1 soil h−1) and dehydrogenase (49.9 μg TPF g−1 soil h−1) activity was recorded in treatment with 156 m3 ha−1 of spent wash in three splits. A positive correlation was observed between phosphatase activity and availability of phosphorus. The positive correlation between urease activity and available mineral nitrogen (r = 0.960) indicates increased availability of nitrogen to crops with spent wash application. Among the treatments, spent wash application at 156 m3 ha−1 resulted in highest microbial biomass carbon Cmic (279.84 μg g−1). Maximum microbial quotient (Cmic/Corg) (5.3 %) and minimum metabolic quotient (7.8 μg C–CO2 h−1 mg C biomass−1) was recorded during one time application of spent wash at 125 m3 ha−1 at time of transplanting/sowing. Soil enzymes, involved in energy flow and nutrient cycling in soil showed significantly higher activities with increasing concentration of spent wash application to the soil. Moreover the increase in microbial biomass and microbial quotient indicates positive effect of spent wash on biological soil health which is as important as physical and chemical status of soil.
Databáze: OpenAIRE
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