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Paper Information

Journal:   JOURNAL OF PLANT PROTECTION (AGRICULTURAL SCIENCE AND TECHNOLOGY)   SPRING-SUMMER 2009 , Volume 23 , Number 1; Page(s) 81 To 88.
 
Paper: 

EFFECT OF SOIL TEXTURE AND TEMPERATURE ON ATRAZINE DEGRADATION AND ITS HALF - LIFE

 
 
Author(s):  EZADI E.*, RASHED MOHASEL M.H., ZAND ESKANDAR, NASIRI MAHALATI MAHDI, LAKZIAN AMIR
 
* COLLEGE OF AGRICULTURE, FERDOWSI UNIVERSITY OF MASHHAD
 
Abstract: 

In order to study the effects of soil texture and temperature on atrazine degradation, an experiment was conducted in completely randomized design with factorial arrangement and 3 replications. Experimental factors included, soil texture (sandy loam and silty clay), temperature (10, 20 and 30oC) and 4 incubation periods (0, 20, 40 and 60 days). Soil was spiked with atrazine at a rate of 50 mg/kg soil and atrazine residue was measured with HPLC. Results showed that soil texture and temperature had significant effects on atrazine degradation rate. The highest and lowest degradation rate observed in clay soil (30 oC) and sandy soil (10oC) with degradation rate coefficient of 0.0077 and 0.001, respectively. Atrazine half-life in clay soil was lower than sandy soil. At 10, 20 and 30 oC atrazine half-life was 693, 364.5 and 138.6 days for sandy soil and 277.2, 157.5 and 90 days for clay soil, respectively. Based on these results it is expected that atrazine persistence would be lower in clay soils with higher temperature.

 
Keyword(s): ATRAZINE (AATERAX), SOIL TEXTURE, TEMPERATURE, HALF - LIFE, PERSISTENCE
 
References: 
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