生态环境学报Issue(9)：1514-1522,9.
不同林龄木麻黄人工林生物多样性与土壤养分状况研究
Biodiversity and soil nutrient research of Casuarina Equisetifolia plantation at different stand ages
摘要
Abstract
Casuarina equisetifolia is the main tree species of China's southeast coastal shelter forest. In this paper, we studied the community structure, understory species composition, biodiversity, and soil nutrient along a chronological sequence of Casuarina coastal forest shelterbelts. The results show that self-thinning of the Casuarina plantations was very significant. The individual number in the 18-years old plantation is 975 plants·ha-1, which is less than half of the number in the 3-years old plantation (2350 plants·ha-1). The most rapid growth occurred in the 3-6 years stage. The total species number in the investigating area reached 27, including eight shrub species and 18 herb species. With the growth of plantation, the biodiversity index and evenness index gradually increased, while the dominance index decreased. Forest soil organic carbon, total nitrogen and available N content were low, and had no significant relationship with stand age. The phosphorus supply in this sand soil is relatively good, and the concentration of the available P was generally higher than 3.5 mg·kg-1 in the surface soil layer. Soil available nutrient had significant relationship with the plant diversity, which showed that the soil nutrient was the main limiting factor of plant colonization. The results indicated that Casuarina equisetifolia plantation has simple forest structure, low biodiversity and poor soil nutrient condition.关键词
木麻黄/防护林/林龄/生物多样性/土壤养分Key words
Casuarina equisetifolia/shelter forest/forest age/biological diversity/soil nutrient分类
农业科技引用本文复制引用
徐馨,王法明,邹碧,李钦禄,王刚,李应文,凌清云,李志安..不同林龄木麻黄人工林生物多样性与土壤养分状况研究[J].生态环境学报,2013,(9):1514-1522,9.基金项目
中国科学院战略性先导科技专项(XDA05070307）；国家重点基础研究发展计划(2009CB421101，2011CB403204)；中科院领域前沿项目(KSCX2-EW-J-28)；广东省林业科技创新专项资金项目(2012KJCX013-02) （XDA05070307）；国家重点基础研究发展计划(2009CB421101，2011CB403204）
