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Title (Primary) Nitrogen additions retard nutrient release from two contrasting foliar litters in a subtropical forest, Southwest China
Author Zhuang, L.; Liu, Q.; Liang, Z.; You, C.; Tan, B.; Zhang, L.; Yin, R.; Yang, K.; Bol, R.; Xu, Z.;
Journal Forests
Year 2020
Department BZF;
Volume 11
Issue 4
Language englisch;
POF III (all) T12;
Keywords nitrogen deposition; litter decomposition; litter-residue quality; subtropical forest
Abstract 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
ID 23231
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=23231
Zhuang, L., Liu, Q., Liang, Z., You, C., Tan, B., Zhang, L., Yin, R., Yang, K., Bol, R., Xu, Z. (2020):
Nitrogen additions retard nutrient release from two contrasting foliar litters in a subtropical forest, Southwest China
Forests 11 (4), art. 377