Effects of imazamox on soil carbon and nitrogen mineralization under Mediterranean climate

Authors : Nacide KIZILDAĞ, Hüsniye SAĞLIKER, Şahin CENKSEVEN, Hüseyin Cengiz DARICI, Burak KOÇAK

Pages : 334-339

Doi:10.3906/tar-1303-52

View : 20 | Download : 9

Publication Date : 2014-06-01

Article Type : Research Paper

Abstract :Imazamox is an herbicide intensively used in the peanut fields of Turkey. Carbon and nitrogen mineralizations were determined at 20 °C to evaluate the effects of the herbicide in soils humidified to 60% and 80% of field capacity insert ignore into journalissuearticles values(FC); over 45 days. Three doses of this herbicide [recommended dose insert ignore into journalissuearticles values(RD, 10 mg kg-1);, 2× RD, and 4× RD] were added to soils without any previous imazamox application insert ignore into journalissuearticles values(NI); and to peanut soils with previous applications of imazamox insert ignore into journalissuearticles values(I);. Carbon mineralization, determined by CO2 respiration, at RD of I soil at 80% humidity was higher than that of the other herbicide doses at both 80% and 60% humidities. NO3-N contents insert ignore into journalissuearticles values(mg kg-1); of I and NI soil controls were significantly higher than with all herbicide doses at 80% and 60% of FC. Nitrate production decreased with increasing doses of herbicide and was significantly lower in I soil than NI soil at both humidity levels. It may be concluded that the presence of imazamox in both soils was negatively affected by nitrate bacteria.
Keywords : Key words Herbicide, humidity, microbial activity, peanut, temperature