کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8893557 | 1629188 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vertical distribution of soil total nitrogen and soil total phosphorus in the critical zone on the Loess Plateau, China
ترجمه فارسی عنوان
توزیع عمودی نیتروژن و فسفر کل خاک در ناحیه بحرانی در فلات لس،
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کلمات کلیدی
منطقه بحرانی زمین، نیتروژن، فسفر، توزیع عمودی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
It is important to determine the vertical distributions of soil total nitrogen (STN) and soil total phosphorus (STP) as well as the factors that influence them in the Earth's critical zone (CZ) in order to understand the N/P cycle in the CZ. However, few data are available regarding the vertical distributions of STN and STP in deep soil profiles in the CZ. Thus, this study investigated the vertical distributions of the STN and STP as well as related factors in a deep soil profile on the Loess Plateau, China. Soil drilling was used to collect 703 soil samples throughout the soil profile from five sites. The STN decreased initially at all of the sampling sites (except at Shenmu), before fluctuating with increasing depth throughout the profile, whereas the STP exhibited a fluctuating trend at all sites. The mean STN and STP concentrations ranged from 0.12â¯gâ¯kgâ1 to 0.25â¯gâ¯kgâ1 and from 0.45â¯gâ¯kgâ1 to 0.58â¯gâ¯kgâ1, respectively. The adjusted r2 values based on stepwise multiple linear regressions for STN and STP ranged from 35% to 83% and from 4% to 17%, respectively, and thus, STN was explained better by the measured soil variables compared with STP. The mean STN and STP stocks ranged from 1.87 to 3.90â¯mgâ¯haâ1 and from 6.75 to 9.09â¯mgâ¯haâ1, respectively. The results of this study facilitate evaluations of STN and STP stocks and studies of the N/P cycle in the CZ on the Loess Plateau.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: CATENA - Volume 166, July 2018, Pages 310-316
Journal: CATENA - Volume 166, July 2018, Pages 310-316
نویسندگان
Jiangbo Qiao, Yuanjun Zhu, Xiaoxu Jia, Laiming Huang, Ming'an Shao,