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Impact of long-term application of patranala sewage on carbon sequestration and heavy metal accumulation in soils

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Title Impact of long-term application of patranala sewage on carbon sequestration and heavy metal accumulation in soils
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Creator Dotaniya M. L., Meena V.D., Rajendiran S., Vassanda Coumar M., Sahu A., Saha J. K., Kundu S., Das H. and Patra A. K.
 
Subject Carbon sequestration, heavy metals, plant nutrient, sewage irrigation
 
Description Not Available
There is a gradual decline in good quality irrigation water for crop production. Farmers are forced to use
poor quality water for crop production in peri-urban areas. Among the wastewater, sewage water generally
contains higher amount of plant nutrients and dissolved organic matter. A case study was conducted to
investigate the impact of untreated sewage water application on physicochemical properties and carbon
sequestration in soil. For this purpose, peri-urban agricultural lands irrigated with sewage water from
Patranala, Bhopal were selected. Such lands around both sides of the Patranala were being irrigated with
sewage water for more than last 50 years. The soil samples were collected at various soil depths i.e., 0-15,
15-30, 30-45 and 45-60 cm from these fields; and sampling points were at about 2 km intervals along the
channel direction and also at the distance interval of about 0.5, 1.0, 1.5 and 2.0 km away from the sewage
carrying channel. The soil microbial population and enzymatic activities were considerably higher in the
sewage irrigated fields as compared to those in tubewell irrigated area. Concentrations of heavy metals in
surface soils were also higher in sewage irrigated fields. Maximum soil organic carbon (SOC) contents
were found in surface layer (0-15 cm), which decreased with depth at all the locations. Net stock of carbon
in upper 60 cm of the soil depth was higher in sewage irrigated lands as compared to those irrigated with
tubewell water. Thus, long-term application of sewage water for crop production enhanced sequestration of
sewage borne carbon in soil profile, which otherwise could pollute the surface water bodies and emit in the
atmosphere as greenhouse gases. However, heavy metals build-up in the sewage irrigated area is a major
concern.
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Date 2020-05-21T09:52:19Z
2020-05-21T09:52:19Z
2018
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/36074
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Soil Science