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27 May 2019 Effects of Nitrogen Deposition and Liming on the Early Regeneration of Two Dominant Tree Species in a Subtropical Forest of China
Wenjuan Han, Jia Jiang, Qinru He, Huifang Huang, Jiahong Hu, Shimeng Hu, Jian Ni
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Abstract

To assess the effects of nitrogen deposition and liming on the early regeneration of two dominant tree species, Pinus massoniana and Schima superba, in a subtropical forest of China, we conducted a greenhouse experiment at three nitrogen deposition levels (0, 10, and 20 g N m-2 year-1) and two liming levels (0 and 100 g CaCO3 m-2 year-1). Results showed that (1) nitrogen deposition decreased the seed germination and seedling survival of P. massoniana, but did not affect those of S. superba; (2) high nitrogen deposition decreased the height and diameter of P. massoniana, but did not affect the diameter of S. superba, and low nitrogen deposition increased the height of S. superba; (3) high nitrogen deposition decreased the aboveground, belowground, and total biomass of P. massoniana and only reduced the aboveground biomass of S. superba; (4) liming increased the height of S. superba under a high nitrogen deposition, but decreased the height of P. massoniana regardless of nitrogen deposition levels. These results indicate that increased nitrogen deposition may render the habitat suitable for S. superba growth, but reduce the P. massoniana population. Liming appears ineffective in mitigating the negative effects of high nitrogen deposition in this region.

© 2019 Université Laval
Wenjuan Han, Jia Jiang, Qinru He, Huifang Huang, Jiahong Hu, Shimeng Hu, and Jian Ni "Effects of Nitrogen Deposition and Liming on the Early Regeneration of Two Dominant Tree Species in a Subtropical Forest of China," Ecoscience 26(3), 269-277, (27 May 2019). https://doi.org/10.1080/11956860.2019.1570714
Received: 8 November 2018; Accepted: 12 January 2019; Published: 27 May 2019
JOURNAL ARTICLE
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KEYWORDS
fertilization
Pinus massoniana
Schima superba
seed germination
seedling growth
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