摘要
分析比较了在酸沉降影响下生长的香樟Cinnamomum camphora纯林和马尾松Pinus massoniana纯林的土壤化学性质.结果表明:在上、中、下层土壤中,香樟纯林土壤pH值分别为3.91、4.23和4.62,盐基饱和度分别为13.11%、45.06%和55.14%,马尾松纯林土壤pH值分别为3.78、3.88和3.89,盐基饱和度分别为9.25%、11.68%和20.96%.香樟纯林中层土壤有机质、中下层土壤全P及各层土壤盐基离子(Ca2+和Mg2+)含量明显高于马尾松纯林(P<0.05),中下层土壤Al3+、H+及上中层土壤Fe3+含量明显低于马尾松纯林(P<0.05).可见,香樟纯林具有减缓土壤酸化和提高土壤肥力的作用.
A comparative investigation was made on soil chemical properties between a pure stand of Cinnamomum camphora and a pure stand of Pinus massoniana, which grew under geographically similar conditions and were exposed to acid deposition. The results showed that the average pH values in the upper, middle and lower soil layers in the pure stand of Cinnamomum camphora were 3.91,4. 23 and 4.62, and base saturation （BS） values were 13.11%, 45.06% and 55. 14% respectively. The average pH values in the upper, middle and lower soil layers in pure stand of Pinus massoniana were 3.78, 3.88 and 3.89, and BS values were 9.25%, 11.68% and 20. 96%, respectively. Contents of organic matter in the middle soil layer, total P in the middle and lower soil layers and exchangeable base cations （Ca^2＋ and Mg^2＋ ） in all soil layers in the pure stand of Cinnamomum camphora were significantly higher than those in the pure stand of Pinus massoniana （ P 〈 0. 05 ）. Contents of exchangeable Al^3＋ and H^＋ ions in the middle and lower soil layers and Fe^3＋ in the upper and middle soil layers in the pure stand of Cinnamomum camphora were clearly lower than those in the pure stand of Pinus massoniana （ P 〈 0.05 ）. The results from this study indicated that the pure stand of Cinnamomum camphora could slow down soil acidification and improve soil fertility.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2007年第2期5-8,共4页
Journal of South China Agricultural University
基金
国家林业局天然林保护工程科技支撑项目"天然林保护工程区森林灾害预防技术(TBKJ2003-04)"
中挪合作项目"中国酸沉降综合影响观测研究"
国家林业局森林生态环境重点实验室资助项目
关键词
酸沉降
香樟
马尾松
土壤化学性质
acid deposition
Cinnamomum camphora
Pinus massoniana
soil chemical properties
