Abstract：
:Alluvial aquifers of the agrarian state of Punjab of southwestern arid zone used for irrigation of rice crops are rich in arsenic concentration. In the present study, rice (Oryza sativa L.) crops were raised in pots in a greenhouse with a purpose to study whether selenium (Se) application was effective in ameliorating As uptake. The rice crop was irrigated with arsenic laced water (0, 2.5, 5.0, 10.0 μM As L-1) throughout the growing period, without and with selenium (0.05 and 0.10 mg kg-1) added through mustard biomass, grown ex situ in seleniferous soil. Arsenic uptake and dry matter yield in different parts of the rice crop were assayed after application of As alone and simultaneous supplementations (As + Se). An antagonistic interaction between Se and As was observed. Addition of As through irrigation water significantly reduced yield of rice grain, straw and root. However, subsequent addition of Se helped in mitigating the harmful effect of As and countered the yield reduction caused due to As toxicity. The effect of Se on dry matter yield was more pronounced at its higher dose (0.10 mg kg-1) as compared to its lower dose (0.05 mg kg-1). The presence of Se either alone or added along with As significantly reduced the As concentration and its uptake by different parts of rice and higher reduction in As concentration was observed with addition of the highest level of applied Se (0.10 mg kg-1). Our observations indicated that Se supplementation might be favourable to reduce As accumulation and toxicity in rice crops.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
Kaur S,Singh D,Singh Kdoi
10.1007/s10661-017-6138-5subject
Has Abstractpub_date
2017-09-01 00:00:00pages
430issue
9eissn
0167-6369issn
1573-2959pii
10.1007/s10661-017-6138-5journal_volume
189pub_type
杂志文章abstract：:Surface mining represents the dominant driver of land coverage changes in the Jiu Valley mining area in Romania. Detecting and quantifying active mines and reclaimed areas are very important tasks given the effects of surface mining on the environment. In this paper, Landsat imagery for the years 1988, 1998, 2008, and...
journal_title：Environmental monitoring and assessment
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journal_title：Environmental monitoring and assessment
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journal_title：Environmental monitoring and assessment
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