Gong Zhang, Guang-ming Zeng, Yi-min Jiang, Chun-yan Du, Guo-he Huang, Jia-mei Yao, Mei Zeng, Xi-lin Zhang, Wei Tan. (2006). Seasonal dry deposition and canopy leaching of base cations in a subtropical evergreen mixed forest, China. Silva Fennica vol. 40 no. 3 article id 327. https://doi.org/10.14214/sf.327

Keywords: throughfall; bulk precipitation; dry deposition; canopy exchange; base cations; evergreen forest

Abstract | View details | Full text in PDF | Author Info

We evaluated the dry deposition and canopy leaching fluxes of base cations in the growing and the dormant seasons using the Na-ratio method based on the 4-year (2000–2003) monitoring data in Shaoshan subtropical evergreen mixed forest, China. The dry deposition of base cations in the growing seasons was lower than that in the dormant seasons, while the canopy leaching of base cations was higher in the growing seasons than that in the dormant seasons. The precipitation quantity and H⁺ significantly impacted the canopy leaching processes. The annual canopy leaching of K⁺, Ca²⁺ and Mg²⁺ accounted for 88, 46 and 38% of net throughfall flux, respectively. The canopy retention of proton (H⁺ and NH₄⁺) is close to the canopy leaching of base cations calibrated by weak acids, indicating that the canopy cations leaching is neutralizing acid precipitation.

Zhang, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China; Hunan Environmental Protection Bureau, Hunan Province, Changsha, 410076, P.R. China E-mail: gz@nn.cn
Zeng, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China E-mail: zgming@hnu.cn
Jiang, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China; Hunan Environmental Protection Bureau, Hunan Province, Changsha, 410076, P.R. China E-mail: ymj@nn.cn
Du, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China E-mail: cyd@nn.cn
Huang, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China E-mail: ghh@nn.cn
Yao, Xiangya Hospital, Central-south University, Hunan Province, Changsha 410008, P.R. China E-mail: jmy@nn.cn
Zeng, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China E-mail: mz@nn.cn
Zhang, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China E-mail: xlz@nn.cn
Tan, College of Environmental Science and Engineering, Hunan University, Hunan Province, Changsha 410082, P.R. China E-mail: wt@nn.cn

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