摘要
以桂北地区桉树(Eucalyptus grandis×E.urophylla)林、杉木(Cunninghamia lanceolata)林、马尾松(Pinus massoniana)林和毛竹(Phyllostachys edulis)林的土层0~60 cm土壤为研究对象,对比分析了4种森林类型的土壤有机碳质量分数及密度分布特征。结果表明:(1)在4种森林类型土层中,有机碳质量分数的最大值[(49.49±1.16)g·kg-1]和最小值[(4.50±0.52)g·kg-1]分别出现在毛竹林土层0~15 cm和马尾松林土层45~60 cm。土层0~60 cm有机碳质量分数平均值按大小顺序排列为:毛竹林(28.16g·kg-1)>杉木林(25.10 g·kg-1)>桉树林(14.52 g·kg-1)>马尾松林(9.56 g·kg-1)。桉树林、杉木林、马尾松林和毛竹林土层0~15 cm有机碳质量分数所占的比例分别为28.29%、39.14%、55.44%和43.94%。(2)4种森林类型土层中有机碳密度的最大值[(6.71±1.72)kg·m-2]和最小值[(1.14±0.11)kg·m-2]分别出现在杉木林土层0~15 cm和马尾松林土层40~60 cm。土层0~60 cm的有机碳密度平均值按大小顺序排列为:杉木林(19.60 kg·m-2)>毛竹林(18.85 kg·m-2)>桉树林(12.91 kg·m-2)>马尾松林(8.47kg·m-2)。桉树林、杉木林、马尾松林和毛竹林土层0~15 cm有机碳密度所占的比例分别为25.12%、34.25%、52.07%和32.64%。4种森林类型土壤有机碳质量分数和有机碳密度均随着土层深度的增加呈降低的趋势。
Based on the soil horizons of 0-60cm of Eucalptus grandisxE, urophylla forest, Cunninghamia lanceolata forest, Pinus massoniana forest and Phyllostachys edulis forest planted in northern Guangxi, which the distribution characteristics of the soil organic carbon content and soil organic carbon density had studied. The results showed that the maximum value and minimum value of soil organic carbon content were occurred at the soil horizons of 0-15 cm [（49.49±1.16） g kg-1] of the Phyllostachys edulis forest and at the soil horizons of 45-60 cm [（4.50 ±0.52） g kg-1] of the Pinus massoniana forest, respectively. The average value of the soil organic carbon content at the soil horizons of 0-60cm of the four forest types arranged as the following order： Phyllostachys edulis forest （28.16 g kg-1 ） 〉 Cunninghamia lanceolata forest （25.10 g .kg-1 ） 〉 Eucalptus grandis ~E. urophylla forest （ 14.52 g .kg-1 ） 〉 Pinus massoniana forest （9.56 g kg-1）. The proportion of soil organic carbon content at the soil horizons of 0-15cm of the Eucalptus grandisx E. urophylla forest, Cunninghamia lanceolata forest, Pinus massoniana forest and Phyllostachys edulis forest were 28.29%, 39.14%, 55.44% and 43.94%, respectively. The maximum value and minimum value of the soil organic carbon density were occurred at the soil horizons of 0-15 cm [（6.71±1.72） kg m2] of the Cunninghamia lanceolata forest and at the soil horizons of 45-60 cm [（ 1.14±0.1 l） kg.m-2] of the Pinus massoniana forest, respectively. The average value of the soil organic carbon density at the soil horizons of 0-60cm of the four forest types arranged as the following order： Cunninghamia lanceolata forest （19.60 kg.m-2） 〉 Phyllostachys edulis forest 08.85 kg m-2） 〉 Eucalptus grandis^E, urophylla forest （12.91 kg m-2） 〉 Pinus massoniana forest （8.47 kg m-2）. The proportion of the soil organic carbon density at the soil horizons of 0-15 cm of the Eucalptus grandisxE, urophylla forest, Cunninghamia lanceoIata fores
出处
《生态环境学报》
CSCD
北大核心
2013年第8期1282-1287,共6页
Ecology and Environmental Sciences
基金
广西科技重大专项(2010GXNSFD169007
桂科基1123014
桂科基11166-01
桂科基11199001)
广西高校科学技术研究项目(2013ZD008)
广西区学位点学科建设重点科学研究项目
广西研究生教育创新计划(YCSZ2012055)
珍稀濒危动植物生态与环境保护省部共建教育部重点实验室基金(桂科能1101Z003)
广西珍稀濒危动物生态学重点实验室开放基金(桂科能1301k005)
