کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10224007 | 1701069 | 2019 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Responses of soil phosphorus fractions after nitrogen addition in a subtropical forest ecosystem: Insights from decreased Fe and Al oxides and increased plant roots
ترجمه فارسی عنوان
واکنش فسیلی خاک پس از افزودن نیتروژن در اکوسیستم جنگل های نیمه گرمسیری: بینایی از کاهش اکسید های آهن و آلومینیوم و افزایش ریشه های گیاه
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
Elevated nitrogen (N) deposition may exacerbate soil phosphorus (P) limitations in P-deficient subtropical forest ecosystems. However, which abiotic factors predominantly contribute to soil P transformations and how plant roots affect soil P variations after N addition in these ecosystems are unclear. To address these issues, we studied a natural Castanopsis carlesii forest in Fujian, China subjected to 3â¯years of N addition. Soil P fractions, soil properties, iron (Fe) and aluminum (Al) oxides, root biomass (RB), and root length density (RLD) were investigated. The results showed that N application remarkably increased the concentrations of soil available P but significantly decreased content of soil moderately labile P. The quantities of free Fe and Al (Fed and Ald) and organic-bound Fe and Al (Fep and Alp) decreased after N addition. These changes indicated an important relationship between Fe and Al oxides and P fractions, especially Fep and moderately labile P, suggesting that Fe and Al oxides predominantly influenced soil P fractions in N-enriched plots. Meanwhile, RB and RLD were higher after N addition treatments than control treatment. Positive correlations between RB and RLD and P fractions (available P, labile P, and moderately labile P) indicated that plant roots exert an essential influence on changes in soil P fractions. In conclusion, N addition in subtropical forests significantly influenced soil P fractions, primarily by decreasing Fe and Al oxides and increasing plant root biomass and density.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 337, 1 March 2019, Pages 246-255
Journal: Geoderma - Volume 337, 1 March 2019, Pages 246-255
نویسندگان
Yuexin Fan, Xiaojian Zhong, Fang Lin, Chenchung Liu, Liuming Yang, Minhuang Wang, Guangshui Chen, Yuehmin Chen, Yusheng Yang,