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珊瑚岛礁表层土壤的主要化学性质分析
王玮韧1,2, 郝珖存1, 王俊1, 张炜1, 黄峰1, 陆宏芳1, 简曙光1, 何聃1, 申卫军1
1.中国科学院华南植物园, 中国科学院退化生态系统植被恢复与管理重点实验室, 广州 510650;2.中国科学院大学, 北京 100049
摘要:  为了解我国南海岛礁表层土壤性质,对珊瑚砂和磷质石灰土的主要化学性质进行了分析。结果表明,南沙珊瑚岛礁的珊瑚砂土和西沙东岛的磷质石灰土属于碱性土(pH 8.0~9.0),而鼎湖山赤红壤为酸性土(pH 3.7~4.3)。珊瑚砂土有机碳含量(0.4%)和全氮含量(0.04%)极低,磷质石灰土的碳、氮含量分别为4.05%和0.21%,赤红壤的有机碳和全氮含量分别为2.24%和0.21%。珊瑚砂土的全磷含量(0.04%)也显著低于磷质石灰土(2.2%),但高于赤红壤的(0.02%)。珊瑚砂土和磷质石灰土的钾、钙、钠、镁、铁含量均高于赤红壤,植物群落类型对5种金属元素含量没有显著影响。这些为南海珊瑚岛礁植被恢复过程中植物定居和生长,以及珊瑚岛礁生态规划和保护奠定基础。
关键词:  南沙群岛  珊瑚砂土  磷质石灰土  土壤养分
DOI:10.11926/jtsb.3852
分类号:
基金项目:科技部重点研发计划项目(2016YFC1403001);中国科学院战略先导科技专项(A类)(XDA13020600,XDA13020505)资助
Main Chemical Properties in the Surface Soil of the Coral-sand Islands
WANG Wei-ren1,2, HAO Guang-cun1, WANG Jun1, ZHANG Wei1, HUANG Feng1, LU Hong-fang1, JIAN Shu-guang1, HE Dan1, SHEN Wei-jun1
1.Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;2.University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:  In order to understand the properties of surface soil in islands of South Sea, China, the main chemical properties of coral-sand soil from Nansha Island and phosphor calcic soil in East Island were analyzed. The results showed that the coral-sand soil and phosphor calcic soil were alkaline with pH from 8.0 to 9.0, while the latosolic red soil from evergreen broad-leaved forest at Dinhushan Biosphere Reserve, Guangdong Province was acidic with pH from 3.7 to 4.3. The coral-sand soil was very poor in contents of organic carbon (0.4%) and total nitrogen (0.04%) compared with phosphor-calcic soil (4.05% and 0.21%, respectively) and latosolic red soil (2.24% and 0.16%, respectively). Total phosphorous content in phosphor calcic soil (2.2%) was much higher than that in coral-sand soil (0.04%) and latosoic red soil (0.02%). The contents of K, Na, Ca, Mg, and Fe in coral-sand soil and phosphor calcic soil were significant higher than those in latosoic red soil. The plant community type had no influence on contents of five metal elements. These would lay the foundation of plant settle and grow during reconstruct vegetation, and ecological planning and conservation of coral island.
Key words:  Nansha islands  Coral-sand soil  Phosphor calcic soil  Soil nutrient

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