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پژوهش های حفاظت گیاهان ایران

مقاله 7، دوره 25، شماره 1 - شماره پیاپی 11، فروردین 1390   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jpp.v25i1.9592

نویسندگان

ابراهیم ایزدی دربندی^{* 1}؛ محمد حسن راشد محصل²؛ اسکندر زند³؛ مهدی نصیری محلاتی⁴؛ امیر لکزیان⁴

¹فردوسی

²دانشکده کشاورزی

³موسسه گیاهپزشکی کشور

⁴دانشگاه فردوسی مشهد

چکیده

Abstract
Atrazine is the most important triazine herbicides with moderately persistence in soil. In order to study the effects of manure and its application rate on atrazine degradation, an experiment was conducted as split plot in completely randomized design with 3 replications. Experimental factors included organic manure at 2 levels (0 and 50 ton per hectare) as main plot and atrazine application rate at 2 level(2 and 4 kg a.i per hectare a.i.) as sob plot. Results showed that atrazine persistence increased as increasing its application rate and organic manure added in soil. Highest half-life(12.92 days) and lowest degradation rate(0.0536 mg/kg soil day-1) was observed in 50 kg organic manure and 4 kg atrazine per hectare and lowest half-life(3.64 days) and highest degradation rate(0.19 mg/kg soil day-1) was observed in 0 kg oganic manure and 2 kg atrazine per hectare. Based on results of this experiment, increasing of organic manure in soil can decrease atrazine leaching and increase its degradation. It seems increasing of soil microbial community and activity, will affect atrazine degradation rate.

Keywords: Herbicide, Soil texture, Microbial activity, Persistence, Half-life