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Post irrigation impact of domestic sewage on composition of soils, crops and ground water- a case study

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Title Post irrigation impact of domestic sewage on composition of soils, crops and ground water- a case study
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Creator R.K. Yadav,
B.Goyal,
R.K.Sharma,
S.K. Dubey and P.S. Minhas
 
Subject Sewage irrigation; Soil contamination; Long-term impacts; Ground water contamination; Plant composition
 
Description Not Available
Long-term irrigation with sewage water adds large amounts of carbon, major and micro- nutrients to the soil. We compared the spatial
distribution of N, P, K and other micronutrients and toxic elements in the top 0.6 m of an alluvial soil along with their associated effects on
the composition of crops and ground waters after about three decades of irrigation with domestic sewage effluent as a function of distance
from the disposal point. Use of sewage for irrigation in various proportions improved the organic matter to 1.24–1.78% and fertility status of
soils especially down to a distance of 1 km along the disposal channel. Build up in total N was up to 2908 kg ha 1, available P (58 kg ha 1),
total P (2115 kg ha 1), available K (305 kg ha 1) and total K (4712 kg ha 1) in surface 0.15 m soil. Vertical distribution of these parameters
also varied, with most accumulations occurring in surface 0.3 m. Traces of NO3–N (up to 2.8 mg l 1), Pb (up to 0.35 mg l 1) and Mn (up to
0.23 mg l 1) could also be observed in well waters near the disposal point thus indicating initiation of ground water contamination. However,
the contents of heavy metals in crops sampled from the area were below the permissible critical levels. Though the study confirms that the
domestic sewage can effectively increase water resource for irrigation but there is a need for continuous monitoring of the concentrations of
potentially toxic elements in soil, plants and ground water.
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Date 2019-11-30T08:40:29Z
2019-11-30T08:40:29Z
2002-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/26001
 
Language English
 
Relation Not Available;
 
Publisher Not Available