Influences Of Lime And Coconut Fiber To Arsenic Uptake On Peanuts In An Phu District, An Giang Province

Nguyen Van Chuong


Arsenic (As) contamination in deep-well water has presently been warned in some areas of An Giang province. The previous studies in An Phu district showed that the level of As in soils was also many folds higher than international standards that need to be studied; particularly in land use and water supply in agricultural production. The objectives of this research were to: (i) evaluate the situation of As contain in soil and well water from cultivated lands in An Phu district, An Giang province; (ii) evaluate the impact of coconut fiber and liming methods on the uptake and accumulation of As in peanuts. The survey studies indicated that all of deep-well water samples were contaminated with As from 97,5 μg/l to 469 μg/l in An Phu district. These levels exceed Vietnamese and WHO standards (<10 μg/L), and all studied communes used deep-well water for watering their crops (69,6%). The As averages of soil samples inside dikes were higher than outside dikes from 1,5 to 2 times. As concentration of all soil samples for planting peanuts inside the dike are always higher than outside the dike from 1,5 to 2 times. The averages of As levels of arable land samples inside dikes of An Phu district were from 40,1 to 47,8 mg/kg. When applied 5 tons of lime and coconut fiber per ha reduced As levels at 55,3% compared with treatment without lime and coconut fiber. The results also showed that, when applied lime 5 tons of lime and coconut fiber per ha had a significant effect on the growth and yield of peanuts. Productivity of the peanut that increased from 9,10% to 30,4%, compared without liming and coconut fiber. When applied lime, coconut fiber had a significant effect on amount of As in grains and bodies of peanuts was lower than without lime and coconut fiber treatments.The yield components indicated, peanuts were planted with coconut fiber and l liming, that had the best result and the the lowest was without liming and coconut fiber. When applied 5 tons of liming combined with coconut fiber per ha had the highest results, both level of As reduction in peanut grains and productivity. Necessary to study many levels of liming and coconut fiber and residual lime in the soil for the next crops. It recommend that people have safe farming methods and effects on soils of as contamination.

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