کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8873033 | 1622878 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interactive effects of CO2 concentration elevation and nitrogen fertilization on water and nitrogen use efï¬ciency of tomato grown under reduced irrigation regimes
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The interactive effects of CO2 concentration elevation, N fertilization, and reduced irrigation regimes on water and nitrogen use efficiency (WUE and NUE) of tomato (Solanum lycopersicum L.) plants at both leaf and whole plant scales were investigated in a split-root pot experiment. The plants were grown in two separate climate-controlled greenhouse cells at atmospheric [CO2] of 400 (a[CO2]) and 800 (e[CO2]) ppm, respectively. In each cell, plants were fertilized at either 1.5 or 3â¯gâ¯N per pot. The leaf physiological parameters, C and N content in stem, leaf and fruit were determined, and both WUE and NUE were evaluated. Plants harvested from 3â¯gâ¯N per pot associated with e[CO2] environment possessed the greatest photosynthetic rate (Pn) and lowest stomatal conductance (gs) and transpiration rate (Tr), resulting in the highest WUE at stomatal and leaf levels. Especially alternate partial root-zone irrigation (PRI) strategy coupled with e[CO2] had the potential to synergistically reduce gs and Tr while sustain Pn and leaf water status, and further improve tomato leaf WUE. e[CO2] combined with sufficient N fertilization enhanced the biomass, C accumulation and N uptake of plants under reduced irrigation; yet the WUE and NUE at whole plant scale were affected solely by the N supply being greater in low N fertilizer. These findings provide useful knowledge on efficient irrigation and N management for adapting to the future water-limited and CO2-enriched environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 202, 1 April 2018, Pages 174-182
Journal: Agricultural Water Management - Volume 202, 1 April 2018, Pages 174-182
نویسندگان
Zhenhua Wei, Taisheng Du, Xiangnan Li, Liang Fang, Fulai Liu,