We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
间伐对杉木人工林不同组分碳、氮、磷含量及其生态化学计量关系的影响
- Authors
邱勇斌; 凌高潮; 郑文华; 邢文黎; 成向荣
- Abstract
[Objective] To study the changes of carbon (C), nitrogen (N) and phosphorus (P) stoichiometry in Chinese fir (Cunninghamia lanceolata) plantations after thinning. [Method] Nine 20 m×20 m plots were established in 17-years-old Chinese fir plantation in Kaihua Forest Farm of Zhejiang. The contents and stoichiometry of C, N, and P in litter, understory, fine roots and soil were studied under three thinning intensities, i.e. unthinning, moderate thinning (20%), and heavy thinning (37%). [Result] After 2 years of thinning, the litter biomass and fine root biomass of Chinese fir decreased significantly (P<0.05) in the heavy thinning treatment, while the understory vegetation biomass increased significantly. Compared with the unthinned stands, the total N content decreased significantly in the litter and increased in the understory vegetation in the heavy thinning treatment (P<0.05), and the contents of soil organic carbon and total nitrogen also increased significantly in the heavy thinning treatment (P<0.05). The contents of C, N, and P in the fine roots of Chinese fir showed no significant difference among the unthinned, 20% thinned and 37% thinned stands. The ratios of C/N and C/P in the litter increased with increasing thinning intensity. The C/N ratio of the understory vegetation decreased with increasing thinning intensity, and N/P ratio increased with increasing thinning intensity. The ratios of C/N, C/P and N/P in the fine root and soil showed no significant difference among the three thinning treatments. There was positive correlation in the contents of C, N and P and their ratios between soil and understory vegetation. [Conclusion] The contents of C and N in the litter, understory vegetation and soil are strongly affected by thinning intensity during a short time after thinning. Thinning alters C, N and P stoichiometry in litter and understory vegetation, but has no effect on fine roots of Chinese fir and soil.
- Subjects
ZHEJIANG Sheng (China); CHINA fir; CARBON in soils; TREE farms; TREE crops; FIR
- Publication
Forest Research, 2019, Vol 32, Issue 4, p64
- ISSN
1001-1498
- Publication type
Article
- DOI
10.13275/j.cnki.lykxyj.2019.04.009