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Degradation of Lindane (γ-HCH) in a Mollisol as Effected by Different Soil Amendments

Journal of Environmental Protection 2011年第9期2卷 1207-1210页

作者： gunjan bhatia Anjana Srivastava Prakash Chandra Srivastava 不详

Soil amendments play an important role in management of pesticide residues. In this study, incubation experiment was conducted using the surface (0 - 15 cm) sample of a mollisol supplied with different soil amendments (farmyard manure, cow-dung slurry, pyrite and gypsum) to investigate the effect of amendments on the dissipation of lindane in mollisols. Dissipation of lindane in soil was studied at eight consecutive samplings (0, 1, 3, 5, 7, 10, 15 and 30 d). The results indicated that soil amendments could promote the degradation of lindane in soil. After 30 d of incubation 79% degradation was observed in the untreated soil (without any amendment) whereas, in the case of farmyard manure and cow-dung slurry amended soils, 83% and 91% degradation was observed, respectively. The pyrite and gypsum amendments also enhanced the degradation of lindane in soils, but the effect was less pronounced as compared to the organic amendments. Enhanced degradation in soil treated with organic amendments could be attributed to stimulated microbial activity after the addition of organic amendments. These addition, under different soil management conditions, minimize the persistence of lindane and consequently the risk of leaching and seepage into aquifers.

关键词： Lindane Amendment Soil Residue Degradation

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Bioefficacy and Residue Studies of Fantac (Biostimulant) in Rice Crop under Sub-Tropical Conditions

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Journal of Environmental Protection 2010年第3期1卷 261-263页

作者： Anjana Srivastava gunjan bhatia Renuka Pant Prakash Chandra Srivastava 不详

Field investigations were conducted for three seasons from July 2006-2007 to test the efficacy of Fantac (N-ATCA) in transplanted rice and also determine its harvest time residues in paddy grain, straw, husk and soil by HPLC. It was applied at the rate of 25, 50, 75 and 100 mL/100 L respectively. The results revealed that foliar spray of this agrochemical on rice crop did not produce any significant effect on the general growth parameters but increased the number of grains/panicle. The residues of fantac were found to be < 0.05 μg/g at the time of harvest which are below MRL and thus Fantac can be considered as environmentally safe.

关键词： Fantac Biostmulant Harvest Residues HPLC

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