![Effects of N-enriched sewage sludge on soil enzyme activities [An article from: Applied Soil Ecology]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR5XJO.jpg)
Effects of N-enriched sewage sludge on soil enzyme activities [An article from: Applied Soil Ecology]
Book Details
Author(s)R. Kizilkaya, B. Bayrakli
PublisherElsevier
ISBN / ASINB000RR5XJO
ISBN-13978B000RR5XJ7
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Applied Soil Ecology, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Sewage sludge is increasingly used as an organic amendment to soil, especially to soil containing little organic matter. However, little is known about utility of this organic amendment with N-enriched or adjusted C:N ratios in soil. We studied the effects of adding of different doses (0, 100, 200 and 300tha^-^1) and C:N ratios (3:1, 6:1 and 9:1) of sewage sludge on enzyme activities (@b-glucosidase, alkaline phosphatase, arylsulphatase and urease) in a clay loam soil at 25^oC and 60% soil water holding capacity. Nitrogen was added in the form of (NH"4)"2 SO"4 solution to the sludge to reduce the C:N ratio from 9:1 to 6:1 and 3:1. The addition of different doses and C:N ratios of the sludge caused a rapid and significant in the enzymatic activities in soils, this increase was specially noticeable in soil treated with high doses of the sludge. In general, enzymatic activities in sludge-amended soils tended to decrease with the incubation time. All activities reached peak values at 30 days incubation and then gradually decreased up to 90 days of incubation. Sewage sludges also the increased available metal (Cu, Ni, Pb and Zn) contents in the soils. However, the presence of available soil metals due to the addition of the sludge at all doses and C:N ratios did negatively affect all enzymatic activities in the soils. This experiment indicated that all doses and C:N ratios of sewage sludge applied to soil would have harmful effects on enzymatic activity. Some heavy metals found in sewage sludge may negatively influence soil enzyme activities during the decomposition of the sludge.
Description:
Sewage sludge is increasingly used as an organic amendment to soil, especially to soil containing little organic matter. However, little is known about utility of this organic amendment with N-enriched or adjusted C:N ratios in soil. We studied the effects of adding of different doses (0, 100, 200 and 300tha^-^1) and C:N ratios (3:1, 6:1 and 9:1) of sewage sludge on enzyme activities (@b-glucosidase, alkaline phosphatase, arylsulphatase and urease) in a clay loam soil at 25^oC and 60% soil water holding capacity. Nitrogen was added in the form of (NH"4)"2 SO"4 solution to the sludge to reduce the C:N ratio from 9:1 to 6:1 and 3:1. The addition of different doses and C:N ratios of the sludge caused a rapid and significant in the enzymatic activities in soils, this increase was specially noticeable in soil treated with high doses of the sludge. In general, enzymatic activities in sludge-amended soils tended to decrease with the incubation time. All activities reached peak values at 30 days incubation and then gradually decreased up to 90 days of incubation. Sewage sludges also the increased available metal (Cu, Ni, Pb and Zn) contents in the soils. However, the presence of available soil metals due to the addition of the sludge at all doses and C:N ratios did negatively affect all enzymatic activities in the soils. This experiment indicated that all doses and C:N ratios of sewage sludge applied to soil would have harmful effects on enzymatic activity. Some heavy metals found in sewage sludge may negatively influence soil enzyme activities during the decomposition of the sludge.
