Effects of broadleaf plantation and Chinese fir (Cunninghamia lanceolata) plantation on soil carbon and nitrogen pools

• Published in: Ying yong sheng tai xue bao Vol. 24; no. 2; p. 345
• Main Authors: Wan, Xiao-Hua, Huang, Zhi-Qun, He, Zong-Ming, Hu, Zhen-Hong, Yang, Jing-Yu, Yu, Zai-Peng, Wang, Min-huang
• Format: Journal Article
• Language: Chinese
• Published: China 01.02.2013
• Subjects: Carbon - analysis; China; Cunninghamia - growth & development; Ecosystem; Nitrogen - analysis; Soil - chemistry; Trees - growth & development
• ISSN: 1001-9332

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