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Vegetation recovery alters soil N status in subtropical karst plateau area: Evidence from natural abundance δ15N and δ18O
Purpose Forest recovery from disturbance can alter soil nitrogen (N) status as a result of complex interactions in plant-soil system. The δ 15 N and δ 18 O are indicators that integrate complex soil N processes and can help elucidate changes in soil N status. Our objectives were to evaluate differen...
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Published in: | Plant and soil 2021-03, Vol.460 (1-2), p.609-623 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Purpose
Forest recovery from disturbance can alter soil nitrogen (N) status as a result of complex interactions in plant-soil system. The δ
15
N and δ
18
O are indicators that integrate complex soil N processes and can help elucidate changes in soil N status. Our objectives were to evaluate differences in soil N status among different forest recovery stages in karst plateau in southwestern China.
Methods
We established a forest recovery gradient with sites in cropland, abandoned cropland, shrub land, and early- and late-successional forests. We measured concentrations and isotopic compositions of soil total N, ammonium (NH
4
+
), and nitrate (NO
3
−
), and δ
15
N of plant tissue.
Results
With increased levels of recovery, concentrations of soil total N increased, and δ
15
N of soil total N (δ
15
N
STN
) decreased at 0 ~ 10 cm depth. A positive relationship between δ
15
N
STN
in surface soil and δ
15
N of plant (P |
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ISSN: | 0032-079X 1573-5036 |
DOI: | 10.1007/s11104-020-04797-6 |