Abstract
In this study, it was evaluated, at greenhouse in soil pots, the effect of the herbicide atrazine in different dose (corresponding to o, 0.75, 1.5 and 3.0 kg of soil hectare) over time (15, 30, 45, 60 and 90 days after the application) on the diazotrophic micro-organisms associated with rhizosphere soil and root of a corn cultivation in a clay loam soil of Saldana - Tolima. It was determined the population of diazotrophic microorganisms in soil by the most probable number technique; also it was observed the characteristic growth in the specific cultivation semisolid Nfb-malic acid medium and was evaluated the nitrogenase activity by means of the acetylene reduction technique. Of the same form, it was observed the characteristic growth and it was evaluated the nitrogenase activity of direct fragment sowings of root in the Nfb-malic acid medium. The 60.8% of soil isolates presented characteristic cultural growth in the form of whitish pellicle under the surface of the medium. in the root 83.3% showed this type of growth. The population of diazotrophic microorganisms of soil did not present significant differences ({alpha} = 0.05) between treatments neither over time the nitrogenase activity of soil dilutions demonstrated that there is no a
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Citation Formats
Ordonez, Alba R, Lozano de Yunda, A, and Fuentes, C.
Effects of the Atrazine herbicide over the diazotrophic microorganisms associated with corn in a Saldana soil (Tolima); Efecto del herbicida Atrazina sobre los microorganismos diazotrofos asociados a un cultivo de maiz en un suelo de Saldana (Tolima).
Colombia: N. p.,
1999.
Web.
Ordonez, Alba R, Lozano de Yunda, A, & Fuentes, C.
Effects of the Atrazine herbicide over the diazotrophic microorganisms associated with corn in a Saldana soil (Tolima); Efecto del herbicida Atrazina sobre los microorganismos diazotrofos asociados a un cultivo de maiz en un suelo de Saldana (Tolima).
Colombia.
Ordonez, Alba R, Lozano de Yunda, A, and Fuentes, C.
1999.
"Effects of the Atrazine herbicide over the diazotrophic microorganisms associated with corn in a Saldana soil (Tolima); Efecto del herbicida Atrazina sobre los microorganismos diazotrofos asociados a un cultivo de maiz en un suelo de Saldana (Tolima)."
Colombia.
@misc{etde_20507808,
title = {Effects of the Atrazine herbicide over the diazotrophic microorganisms associated with corn in a Saldana soil (Tolima); Efecto del herbicida Atrazina sobre los microorganismos diazotrofos asociados a un cultivo de maiz en un suelo de Saldana (Tolima)}
author = {Ordonez, Alba R, Lozano de Yunda, A, and Fuentes, C}
abstractNote = {In this study, it was evaluated, at greenhouse in soil pots, the effect of the herbicide atrazine in different dose (corresponding to o, 0.75, 1.5 and 3.0 kg of soil hectare) over time (15, 30, 45, 60 and 90 days after the application) on the diazotrophic micro-organisms associated with rhizosphere soil and root of a corn cultivation in a clay loam soil of Saldana - Tolima. It was determined the population of diazotrophic microorganisms in soil by the most probable number technique; also it was observed the characteristic growth in the specific cultivation semisolid Nfb-malic acid medium and was evaluated the nitrogenase activity by means of the acetylene reduction technique. Of the same form, it was observed the characteristic growth and it was evaluated the nitrogenase activity of direct fragment sowings of root in the Nfb-malic acid medium. The 60.8% of soil isolates presented characteristic cultural growth in the form of whitish pellicle under the surface of the medium. in the root 83.3% showed this type of growth. The population of diazotrophic microorganisms of soil did not present significant differences ({alpha} = 0.05) between treatments neither over time the nitrogenase activity of soil dilutions demonstrated that there is no a significant effect ({alpha} = 0.05) of the treatments (dose) but if there is significant effect of the time. The highest values were presented to 45 days of application of the herbicide, with the application of the highest dose. the nitrogenase activity in the root to what is long of the time was different from rhizosphere soil. The treatment without application of atrazine presented greater values to what is long of the time, however, also in this case were not presented significant differences ({alpha} = 0.05) between the treatments (dose) neither to what is long of the time. For so much, as a conclusion, they were not presented effects on the population and the nitrogenase activity of the diazotrophic microorganisms until 90 days of after the application of atrazine.}
journal = []
issue = {2}
volume = {29}
journal type = {AC}
place = {Colombia}
year = {1999}
month = {Dec}
}
title = {Effects of the Atrazine herbicide over the diazotrophic microorganisms associated with corn in a Saldana soil (Tolima); Efecto del herbicida Atrazina sobre los microorganismos diazotrofos asociados a un cultivo de maiz en un suelo de Saldana (Tolima)}
author = {Ordonez, Alba R, Lozano de Yunda, A, and Fuentes, C}
abstractNote = {In this study, it was evaluated, at greenhouse in soil pots, the effect of the herbicide atrazine in different dose (corresponding to o, 0.75, 1.5 and 3.0 kg of soil hectare) over time (15, 30, 45, 60 and 90 days after the application) on the diazotrophic micro-organisms associated with rhizosphere soil and root of a corn cultivation in a clay loam soil of Saldana - Tolima. It was determined the population of diazotrophic microorganisms in soil by the most probable number technique; also it was observed the characteristic growth in the specific cultivation semisolid Nfb-malic acid medium and was evaluated the nitrogenase activity by means of the acetylene reduction technique. Of the same form, it was observed the characteristic growth and it was evaluated the nitrogenase activity of direct fragment sowings of root in the Nfb-malic acid medium. The 60.8% of soil isolates presented characteristic cultural growth in the form of whitish pellicle under the surface of the medium. in the root 83.3% showed this type of growth. The population of diazotrophic microorganisms of soil did not present significant differences ({alpha} = 0.05) between treatments neither over time the nitrogenase activity of soil dilutions demonstrated that there is no a significant effect ({alpha} = 0.05) of the treatments (dose) but if there is significant effect of the time. The highest values were presented to 45 days of application of the herbicide, with the application of the highest dose. the nitrogenase activity in the root to what is long of the time was different from rhizosphere soil. The treatment without application of atrazine presented greater values to what is long of the time, however, also in this case were not presented significant differences ({alpha} = 0.05) between the treatments (dose) neither to what is long of the time. For so much, as a conclusion, they were not presented effects on the population and the nitrogenase activity of the diazotrophic microorganisms until 90 days of after the application of atrazine.}
journal = []
issue = {2}
volume = {29}
journal type = {AC}
place = {Colombia}
year = {1999}
month = {Dec}
}