کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6374914 1624686 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Agronomic indices, growth, yield-contributing traits, and yield of dry-seeded rice under varying herbicides
ترجمه فارسی عنوان
شاخص های زراعی، رشد، صفات عملکردی و عملکرد برنج خشک شده تحت تنش های مختلف علف کش
کلمات کلیدی
برنج بی هوازی مدیریت علفهای هرز، رشد محصول، زیست توده برنج و علف های هرز،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Dry-seeded rice (DSR) is an emerging resource-conserving technology in many Asian countries, but weeds remain the major threat to the production of DSR systems. A field study was conducted in 2012 and 2013 at the International Rice Research Institute (IRRI), Los Baños, Philippines, to evaluate the performance of sole and sequential applications of preemergence (oxadiazon and pendimethalin), early postemergence (butachlor + propanil and thiobencarb + 2,4-D), and late postemergence herbicides (bispyribac-sodium and fenoxaprop + ethoxysulfuron) with different modes of action in comparison to manual weeding in DSR. The sequential applications of all preemergence and postemergence herbicides reduced weed density and biomass by 80-100% compared to the nontreated plots. The sole application of postemergence herbicides reduced weed density by only 44-54% and weed biomass by 51-61%, whereas oxadiazon alone reduced weed density and biomass by 96-100%. All herbicide treatments and manual weeding significantly affected tiller number, biomass, crop growth rate, agronomic indices, yield-contributing parameters (panicle density and filled grains), and yield (biological and grain) of rice. The highest grain yield was obtained in the manually weeded plots (5.9-6.1 t ha−1) and the plots treated with oxadiazon alone (5.4-5.6 t ha−1) and oxadiazon followed by postemergence herbicides (5.2-5.8 t ha−1). The lowest paddy yield (0.22 t ha−1) was achieved in the nontreated plots followed by the plots treated with the sole application of bispyribac-sodium and fenoxaprop + ethoxysulfuron. The results suggest that oxadiazon is the best broad-spectrum and economically effective herbicide when applied alone or in combination with other effective postemergence herbicides with different modes of action, depending on the weed species present in the field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 177, June 2015, Pages 15-25
نویسندگان
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