Interactive effects of selenium and phosphorus on arsenic availability in soils and its uptake by rice

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dc.contributor.advisorDhanwinder Singh
dc.contributor.authorSumandeep Kaur
dc.date.accessioned2017-05-16T06:14:03Z
dc.date.available2017-05-16T06:14:03Z
dc.date.issued2017
dc.description.abstractIn Punjab, exposure of rice fields to arsenic through groundwater irrigation may lead to As accumulation in soil and increase the possibility of its uptake in rice crop. A screen house experiment was conducted at Department of Soil Science, PAU, Ludhiana to evaluate the effects of incorporation of selenium (Se) enriched mustard biomass (0, 0.05 and 0.10 mg kg-1) grown ex-situ and phosphate fertilization (0, 60 and 120 mg kg-1) on arsenic content and its uptake by rice plants irrigated with water containing different concentrations of arsenic (0, 2.5, 5.0 and 10 µM As L-1). Irrigating rice with water containing As higher than 5 µM As L-1 resulted in significant increase in As content and its uptake by rice grain, straw and root parts and eventually decreased the grain yield (from 15.7 g pot-1 in control to 13.1 g pot-1 by irrigation with water containing 10 µM As L-1). Application of Se @ 0.10 mg kg-1 helped in increasing the yield, retarded As accumulation and uptake by rice. Application of P @ 60 and 120 mg kg-1 along with As addition through irrigation water increased As uptake in rice and eventually decreased the grain yield. Sequential extraction of different As fractions from soil samples, collected after harvesting rice, showed that application of Se decreased proportion of total arsenic in the available forms of As in comparison to non-available forms of As in soil, whereas, P application increased the proportion of available forms of As.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810011243
dc.keywordsArsenic, selenium, phosphorus, rice crop, arsenic uptake, arsenic fractionsen_US
dc.language.isoenen_US
dc.pages66en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemInteractive effects of selenium and phosphorus on arsenic availability in soils and its uptake by riceen_US
dc.subSoil Scienceen_US
dc.themephosphorus on arsenic availability in soilsen_US
dc.these.typeM.Scen_US
dc.titleInteractive effects of selenium and phosphorus on arsenic availability in soils and its uptake by riceen_US
dc.typeThesisen_US
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