The Effects of Glyphosate Isopropylamine and Trifluralin on the Carbon Mineralization of Olive Tree Soils

Authors : Feruze ESER, Hüsniye AKA SAĞLIKER, Cengiz DARICI

Pages : 297-302

View : 19 | Download : 8

Publication Date : 2007-10-01

Article Type : Research Paper

Abstract :Glyphosate isopropylamine and trifluralin are herbicides widely used in Turkish agriculture. The recommended field dose insert ignore into journalissuearticles values(RFD); insert ignore into journalissuearticles values(480 g of active ingredient l-1 for both glyphosate and trifluralin); and 2 x RFD of these herbicides were added to the soil of olive trees insert ignore into journalissuearticles values(Olea europaea L., Oleaceae); growing on the Çukurova University Campus insert ignore into journalissuearticles values(Adana); under Mediterranean climate conditions in order to determine their effects on soil microbial activity as measured by carbon mineralization. Carbon mineralization of all samples was determined by the CO2 respiration method over 30 days insert ignore into journalissuearticles values(28 °C, constant moisture);. When the RFD and 2 x RFD of glyphosate were compared to a control treatment with no herbicide, they significantly stimulated carbon mineralization at the end of the 30 days insert ignore into journalissuearticles values(P < 0.001);, but the RFD and 2 x RFD of trifluralin were not statistically different from the control insert ignore into journalissuearticles values(P > 0.05);. Based on these results, it is possible to conclude that soil microorganisms are capable of using glyphosate as a carbon source.
Keywords : Carbon mineralization, glyphosate isopropylamine, herbicide, trifluralin