TY  - JOUR
AU  - Zhuang, Liyan
AU  - Liu, Qun
AU  - Liang, Ziyi
AU  - You, Chengming
AU  - Tan, Bo
AU  - Zhang, Li
AU  - Yin, Rui
AU  - Yang, Kaijun
AU  - Bol, Roland
AU  - Xu, Zhenfeng
TI  - Nitrogen Additions Retard Nutrient Release from Two Contrasting Foliar Litters in a Subtropical Forest, Southwest China
JO  - Forests
VL  - 11
IS  - 4
SN  - 1999-4907
CY  - Basel
PB  - MDPI
M1  - FZJ-2020-04361
SP  - 377 -
PY  - 2020
AB  - Litter decomposition plays a critical role in regulating biogeochemical cycles in terrestrial ecosystems and is profoundly impacted by increasing atmospheric nitrogen (N) deposition. Here, a N manipulation experiment was conducted to explore the effects of N additions (0 kg N ha−1 yr−1, 20 kg N ha−1 yr−1 and 40 kg N ha−1 yr−1) on decay rates and nutrients release of two contrasting species, the evergreen and nutrient-poor Michelia wilsonii and the deciduous and nutrient-rich Camptotheca acuminata, using a litterbag approach at the western edge of the Sichuan Basin of China. The decay rate and the mineralization of N and phosphorus (P) was faster in nutrient-rich C. acuminata litter than in nutrient-poor M. wilsonii litter, regardless of N regimes. N additions tended to decrease the decay constant (k value) in M. wilsonii litter, but had no effect on C. acuminata litter. N additions had no significant effects on carbon (C) release of both litter types. N additions showed negative effects on N and P release of M. wilsonii litter, particularly in the late decomposition stage. Moreover, for C. acuminata litter, N additions did not affect N release, but retarded P release in the late stage. N additions did not affect the C:N ratio in both litter types. However, N additions—especially high-N addition treatments—tended to reduce C:P and N:P ratios in both species. The effect of N addition on N and P remaining was stronger in M. wilsonii litter than in C. acuminata litter. The results of this study indicate that N additions retarded the nutrients release of two foliar litters. Thus, rising N deposition might favor the retention of N and P via litter decomposition in this specific area experiencing significant N deposition.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000534632500015
DO  - DOI:10.3390/f11040377
UR  - https://juser.fz-juelich.de/record/887704
ER  -