DETERMINACION DE PLAGUICIDAS ORGANOCLORADOS EN SUELOS AGRICOLAS DEL VALLE DE TUCUTUNEMO, MUNICIPIO ZAMORA, VENEZUELA

摘要

A non-experimental research at field and laboratory was performed in order to determine organochlorine pesticides (OCPs) in soil samples from the river valley Tucutunemo Samples were taken between 25 and 30 cm deep in five locations with three replications, located approximately every 3 Km. The samples were dried at ambient for three days and sieved in sieve with 1 mm mesh. 2000 and ISO/IEC 17025: 6630 and methodology 99-B/C, as described in: Standard Method for the Analysis of Water and Wastewater-APHA AWWA for the determination of pesticides, the 2534 standards were used COVENIN -WPCF, issue No. 17 (1989). We considered 14 POC common of which were detected: aldrin, 4,4'-DDE and 4,4'-DDT. The rest, recorded concentrations <0.02 mg/kg. The variance analysis of the results shows significant differences (p 0.05) from the mean concentrations of POC in different locations. It is concluded that POC is present in agricultural soils Tucutunemo Valley, in varying concentrations, highlighting the locality 1, 24.8 mg/kg of aldrin, 4,4'-DDE and 4,4'-DDT, although the results are below the regulation established by the Bolivarian Republic of Venezuela, however, these values could serve as a reference for future research. Moreover, the physical analysis of these soils, show that soils are fertile, with silty-clay-loam, good percentage of organic matter and pH close to 7.