کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8970696 | 1552153 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrates leaching from agricultural land in Hamadan, western Iran
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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چکیده انگلیسی
Nitrogen (N) is vital for plant and microbial growth and rather large amounts are required by most arable and horticulture plants. High nitrate (NO3â) levels of water supplies have been attributed to leaching from the soil and into water systems. In the arid and semi-arid regions, irrigation water carries NO3â into groundwater. This study was conducted to investigate NO3â pollution of groundwater in Hamadan, western Iran. The water samples were mostly taken from domestic and community wells. In this area, the drinking water supply comes mainly from groundwater sources. Nitrate concentrations in the well samples varied from 3 to 252 with the average of 49 mg lâ1. Results showed that of 311 wells, 196 (63%) had levels less than 50 mg lâ1 and 115 (37%) had levels in excess of the 50 mg lâ1 NO3â. Agriculture is the dominant land use in the area and application of N fertilizers clearly has an impact on groundwater. If agricultural losses remain stable, it could be expected that the concentration of NO3â in groundwater will reach or exceed the international recommendations for drinking water (50 mg lâ1) in the future. Irrigation with high NO3â groundwater can minimise the requirement for N fertilizers. To maintain yield increase and minimise NO3â pollution of the groundwater, best management practices, for N fertilizer use should be applied and excessive fertilizer application prevented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 110, Issues 3â4, 1 November 2005, Pages 210-218
Journal: Agriculture, Ecosystems & Environment - Volume 110, Issues 3â4, 1 November 2005, Pages 210-218
نویسندگان
Mohsen Jalali,