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Dynamics of culturable microbial fraction in an Inceptisol under short-term amendment with municipal sludge from different sources

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Title Dynamics of culturable microbial fraction in an Inceptisol under short-term amendment with municipal sludge from different sources
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Creator Trisha Roy
D.R. Biswas
Avijit Ghosh
A.K. Patra
, R.D. Singh
A. Sarkar
S.S. Biswas
 
Subject Sewage sludge Nitrate pollution Microbial biomass carbon Soil enzymes Escherichia coli
 
Description Not Available
Sewage sludge being a cheap source of plant nutrient is commonly applied by farmers and is being promoted for
implementation of “waste to wealth” programme in India. It has diverse impact on soil microbial properties. The aim of
this study was to assess the impact of application of sludge from three waste water treatment plants namely, Okhla
(Sld-O), Keshopur (Sld-K) and Pappankallan (Sld-P) in National Capital Region (NCR), Delhi, India on various soil
biological properties and bio-safety of crop produce. A pot culture experiment with eight treatment combinations
(3 sludge×2 doses [i.e. 11.2 mg kg−1+50% recommended NPK, 22.4 mg kg−1]+recommended dose of
NPK+absolute control) was conducted. The sludge amendment significantly improved the microbial biomass carbon,
potential mineralizable nitrogen, enzyme activities (dehydrogenase, acid and alkaline phosphatase) as well as yield of
palak. However, excess nitrate concentration (∼100% higher than control) in post-harvest soils and contamination of
palak leaves with Escherichia coli is a matter of great concern and should be monitored carefully for proper utilization of
sludge in agriculture.
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Date 2020-07-16T04:41:41Z
2020-07-16T04:41:41Z
2019-01-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/38167
 
Language English
 
Relation Not Available;
 
Publisher Not Available