کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6773071 1431823 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of experimental warming on nitrogen uptake by winter wheat under conventional tillage versus no-till systems
ترجمه فارسی عنوان
اثر گرم شدن آزمایشی بر جذب نیتروژن توسط گندم زمستانه در سیستم های شخم زنی معمولی در مقایسه با سیستم های بدون خنک
کلمات کلیدی
گرمایش جهانی، نیتروژن معدنی، الگوی جذب نیتروژن، نیتروژن آلی، گندم زمستانه،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Despite the perceived importance of nitrogen (N) to growth and production of wheat, few studies have attempted to examine the effect of warming on wheat N uptake or its preference for NO3−-N vs. NH4+-N, especially under different tillage systems. In the North China Plain, an experimental warming (2 °C increase in soil during the jointing stage) study was conducted using in situ 15N labeling under till and no-till systems. We aimed to investigate the uptake of NO3−-N, NH4+-N, and glycine-N by winter wheat. Warming strongly enhanced wheat biomass (14.7% and 13.2% for till and no-till, respectively) and N content in biomass (11.1 and 7.4 g N m−2 for till and no-till, respectively). Total N uptake rates increased by 47% and 40% under till and no-till treatments, respectively. Warming changed the uptake pattern for the three N forms by significantly increasing the contributions of NO3--N by 16% and glycine-derived N by 5%, while decreasing the contribution of NH4+-N by 20% under the two tillage systems, on average. Collectively, high soil temperatures accelerated N uptake in winter wheat and improved the preferential contribution of NO3−-N and glycine-N due to the increase in soil glycine and NO3− content. Our findings suggest that enhanced N uptake improved growth of wheat and could reduce N losses through increased uptake of NO3− under till and no-till systems in the North China Plain under the warmer conditions that are likely in future.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil and Tillage Research - Volume 180, August 2018, Pages 116-125
نویسندگان
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