کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8879132 | 1624639 | 2018 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Site-specific nutrient management enhances sink size, a major yield constraint in rainfed lowland rice
ترجمه فارسی عنوان
مدیریت مواد مغذی خاص سایت، باعث افزایش اندازه سینک، محدودیت عملکرد عمده در برنج نیمه خشک باران می
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Nutrient management can increase crop yield and income, but its effects on yield components are rarely dissected in on-farm research. In this study, we compared aboveground biomass and yield components of rainfed lowland rice under site-specific nutrient management and farmer management from 69 demonstration sites prone to mild to moderate intermittent drought across 9 Philippine provinces over 3 years (the 2011-2013 wet seasons). The sink size (spikeletsâ¯mâ2) was most closely associated with grain yield in all years. Panicle size (spikelets per panicle) increased by 10.4% and 13.0% in 2011 and 2012, respectively, under site-specific nutrient management, with N application around the early reproductive stage of <25â¯kgâ¯Nâ¯haâ1 in farmer nutrient management versus 30-33â¯kgâ¯Nâ¯haâ1 in site-specific management. Higher N application during seedling establishment in farmer nutrient management (55â¯kgâ¯Nâ¯haâ1) than in site-specific management (22â¯kgâ¯Nâ¯haâ1) did not increase panicles mâ2 in any year. Our results demonstrate the yield advantage of site-specific nutrient management in rainfed lowland rice in relatively fertile and less drought-prone environments: enhancing sink size should be the major target of nutrient management; it is unnecessary to apply high amounts of N during seedling establishment to secure a sufficient panicle number; and N application is most important during the early reproductive stage to increase panicle size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 224, 1 July 2018, Pages 76-79
Journal: Field Crops Research - Volume 224, 1 July 2018, Pages 76-79
نویسندگان
Niño P.M.C. Banayo, Crisanta S. Bueno, Stephan M. Haefele, Nenita V. Desamero, Yoichiro Kato,