Arid
DOI10.1007/s11356-016-8102-2
Low C/N ratio raw textile wastewater reduced labile C and enhanced organic-inorganic N and enzymatic activities in a semiarid alkaline soil
Roohi, Mahnaz1; Riaz, Muhammad1; Arif, Muhammad Saleem1; Shahzad, Sher Muhammad2; Yasmeen, Tahira1; Ashraf, Muhammad Arslan3; Riaz, Muhammad Atif4; Mian, Ishaq A.5
通讯作者Riaz, Muhammad
来源期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
EISSN1614-7499
出版年2017
卷号24期号:4页码:3456-3469
英文摘要

Application of raw and treated wastewater for irrigation is an extensive practice for agricultural production in arid and semiarid regions. Raw textile wastewater has been used for cultivation in urban and peri-urban areas in Pakistan without any systematic consideration to soil quality. We conducted a laboratory incubation study to investigate the effects of low C/N ratio raw textile wastewater on soil nitrogen (N) contents, labile carbon (C) as water-soluble C (WSC) contents, and activities of urease and dehydrogenase enzymes. The 60-day incubation study used an alkaline clay loam aridisol that received 0 ( distilled water), 25, 50, and 100% wastewater concentrations, and microcosms were incubated aerobically under room temperature at 70% water holding capacity. Results revealed that raw wastewater significantly ( p < 0.05) changed soil N pools and processes, WSC contents, and enzymatic activities. The organic and inorganic N species increased with increasing wastewater concentrations, whereas WSC contents followed an opposite trend. The highest NH4 (+)- N and NO3 (-) -N contents were observed in soil treated with 100% wastewater. The extractable organic N (EON) contents always represented > 50% of the soil total Kjeldahl N (TKN) contents and served as the major N pool. However, nitrification index ( NO3- -N/NH4+-N ratio) decreased at high wastewater concentrations. A significant negative correlation was observed between EON and WSC ( p < 0.05) and between net nitrification and WSC/EON ratio ( p < 0.01). In contrast, nitrification index and WSC contents were correlated, positively suggesting WSC potentially controlling N turnover in nutrient-poor aridisol. We found significant ( p < 0.0001) positive correlations of soil urease and dehydrogenase enzymatic activities with soil-extractable mineral N contents indicating coupled N cycling and soil biological activity. Higher production and accumulation of soil NO3 (-)- N and EON contents in concentrated wastewater-treated soil could pose an ecological concern for soil fertility, biological health, and water quality. However, the EON could lead to mineral N pool but only if sufficient labile C source was present. The effects of wastewater irrigation on soil N cycling need to be assessed before it is recommended for crop production.


英文关键词Textile wastewater Soil nitrogen Extractable organic nitrogen (EON) Water-soluble carbon (WSC) Soil enzymes
类型Article
语种英语
国家Pakistan
收录类别SCI-E
WOS记录号WOS:000397004600021
WOS关键词CHEMICAL-PROPERTIES ; BIOCHEMICAL-PROPERTIES ; FUNCTIONAL DIVERSITY ; EFFLUENT IRRIGATION ; MICROBIAL BIOMASS ; TERM IRRIGATION ; HEAVY-METALS ; LONG ; NITROGEN ; CARBON
WOS类目Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198777
作者单位1.Govt Coll Univ Faisalabad, Dept Environm Sci & Engn, Faisalabad 38000, Pakistan;
2.Univ Sargodha, Univ Coll Agr, Dept Soil& Environm Sci, Sargodha, Pakistan;
3.Govt Coll Univ Faisalabad, Dept Bot, Faisalabad 38000, Pakistan;
4.Nucl Inst Agr & Biol, Soil Sci Div, Jhang Rd, Faisalabad, Pakistan;
5.Univ Agr Peshawar, Dept Soil & Environm Sci, Peshawar, Pakistan
推荐引用方式
GB/T 7714
Roohi, Mahnaz,Riaz, Muhammad,Arif, Muhammad Saleem,et al. Low C/N ratio raw textile wastewater reduced labile C and enhanced organic-inorganic N and enzymatic activities in a semiarid alkaline soil[J],2017,24(4):3456-3469.
APA Roohi, Mahnaz.,Riaz, Muhammad.,Arif, Muhammad Saleem.,Shahzad, Sher Muhammad.,Yasmeen, Tahira.,...&Mian, Ishaq A..(2017).Low C/N ratio raw textile wastewater reduced labile C and enhanced organic-inorganic N and enzymatic activities in a semiarid alkaline soil.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,24(4),3456-3469.
MLA Roohi, Mahnaz,et al."Low C/N ratio raw textile wastewater reduced labile C and enhanced organic-inorganic N and enzymatic activities in a semiarid alkaline soil".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.4(2017):3456-3469.
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