title: [Effects of broadleaf plantation and Chinese fir (Cunninghamia lanceolata) plantation on soil carbon and nitrogen pools].
abstract: A comparative study was conducted on the soil C and N pools in a 19-year-old broadleaf plantation and a Chinese fir (Cunninghamia lanceolata) plantation in subtropical China, aimed to understand the effects of tree species on the soil C and N pools. In the broadleaf plantation, the C and N stocks in 0-40 cm soil layer were 99.41 Mg.hm-2 and 6. 18 Mg.hm-2, being 33.1 % and 22. 6 % larger than those in Chinese fir plantation, respectively. The standing biomass and the C and N stocks of forest floor in the broadleaf plantation were 1.60, 1.49, and 1.52 times of those in Chinese fir plantation, respectively, and the differences were statistically significant. There was a significant negative relationship between the forest floor C/N ratio and the soil C and N stocks. In the broadleaf plantation, the fine root biomass in 0-80 cm soil layer was 1.28 times of that in the Chinese fir plantation, and the fine root biomass in 0-10 cm soil layer accounted for 48. 2 % of the total fine root biomass. The C and N stocks in the fine roots in the broadleaf plantation were also higher than those in the Chinese fir plantation. In 0-10 cm soil layer, its C stock had a significant positive relationship with the fine root C stock. It was suggested that as compared with Chinese fir plantation, the soil in broadleaf plantation had a greater potential to accumulate organic carbon.
authors.affiliation: Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou, China. wanxiaohua7@163.com
authors.forename: Xiao-Hua
authors.initials: XH
authors.lastname: Wan
authors.forename: Zhi-Qun
authors.initials: ZQ
authors.lastname: Huang
authors.forename: Zong-Ming
authors.initials: ZM
authors.lastname: He
authors.forename: Zhen-Hong
authors.initials: ZH
authors.lastname: Hu
authors.forename: Jing-Yu
authors.initials: JY
authors.lastname: Yang
authors.forename: Zai-Peng
authors.initials: ZP
authors.lastname: Yu
authors.forename: Min-huang
authors.initials: MH
authors.lastname: Wang
mesh_terms: D002244:Carbon / Q000032:analysis*; D002681:China; D032486:Cunninghamia / Q000254:growth & development*; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D014197:Trees / Q000254:growth & development*
chemical_list: D012987:Soil; D002244:Carbon; D009584:Nitrogen