000			03027naa a22004217a 4500
001			G81306
003			MX-TxCIM
005			20220818155331.0
008			220818s2004 at ||||| |||| 10| 0 eng d
020			_a1 920842 21 7
040			_aMX-TxCIM
041			_aeng
072		0	_aE16
072		0	_aP10
090			_aCIS-4332
100	1		_aMiah, M.A.M. _910818
245	1	0	_aAssessment of the impact of arsenic-contamining irrigation water on soil contamination and plant uptake
260			_aGosford (Australia) : _bThe Regional Institute, _c2004.
340			_aComputer File|Printed
500			_aDraft
520			_aGround water, the main source of drinking and irrigation water, is contaminated by naturally occurring arsenic (As) in 61 out of 64 districts of Bangladesh. A study was conducted to assess the quality and impact of As contaminated irrigation water on agricultural soils and crops uptake and to know the spatial variability of As in soil, water and rice. More than hundred shallow tube wells (STW) were selected in Tala thana of Satkhira district in southwestern Bangladesh during boro (winter rice) season, 2002. As content in water, soil and plant parts were determined by hydride generation-atomic absorption spectrophotometer (HG-AAS). The mean value of As in the irrigation water samples was 150 µg/l. Water As content was moderately correlated with electrical conductivity (EC), P, K, Mg, Na and Mn content in water. The mean soil As content was 19.3 mg/kg. The As build up in the soils was influenced by water-As, P, Na, Ca, Mg and Fe and soil organic carbon, clay, exchangeable K, Ca and Mg contents. The mean As concentration in rice grain was 0.328 mg/kg, which was much below the maximum permissible limit (1 mg/kg). The contents of As in straw were several folds higher than in grain and increased with increasing As contents in water and soil. Contents of organic carbon, exchangeable Mg and silt in soil and Fe in water significantly influenced the uptake of As by rice. A well-developed pattern of spatial variability in As content in irrigation water, soil and rice grain was observed in the studied area resulting from differences in soil and land type.
546			_aText in English
591			_a0503|AL-Wheat Program
650		7	_aArsenic _2AGROVOC _912278
650		7	_aIrrigation water _2AGROVOC _94220
650		0	_aSoil pollution _2AGROVOC _915864
650		7	_aRice _2AGROVOC _91243
700	1		_aAhmed, Z.U. _928463
700	1		_aRahman, M.S. _915539
700	1		_aKhaled, H.M. _928465
700	1		_aPanaullah, G.M. _920256
700	1		_aLoeppert, R.H. _928466
700	1		_aDuxbury, J.M. _92592
700	1		_aMeisner, C.A. _93649
711	2		_94324 _aInternational Crop Science Congress _n(4th : _dSeptember 26 – October 1, 2004 : _cBrisbane, Australia)
773	0		_dGosford (Australia) : The Regional Institute, 2004. _tNew directions for a diverse planet: Proceedings of the 4th International Crop Science Congress _wG81984 _z1 920842 20 9
942			_cBP _2ddc _n0
999			_c45728 _d45728