文献类型：期刊文献

中文题名：海南岛热带原始森林主要分布区土壤有机碳密度及影响因素

英文题名：Soil organic carbon density and influencing factors in tropical virgin forests of Hainan Island, China

作者：杨怀[1,2] 李意德[1] 任海[3] 骆土寿[1] 陈仁利[1] 刘文杰[4] 陈德祥[1] 许涵[1] 周璋[1] 林明献[1] 杨秋[4] 姚海荣[4] 周国逸[3]

第一作者：杨怀

机构：[1]中国林业科学研究院热带林业研究所,海南尖峰岭森林生态系统国家野外科学观测研究站,广州510520;[2]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京100091;[3]中国科学院华南植物园,广州510650;[4]海南大学环境与植物保护学院,海口570228

年份：2016

卷号：40

期号：4

起止页码：292-303

中文期刊名：植物生态学报

外文期刊名：Chinese Journal of Plant Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：中国科学院战略性先导科技专项(XDA0505020602);国家自然科学基金(31290223);中央级公益性科研院所基本科研业务费专项(RITFYWZX2012-02和CAFYBB2014QA010)

语种：中文

中文关键词：海南热带原始森林;土壤纵向拟合方法;土壤分层方法;土壤有机碳密度

外文关键词：Hainan tropical virgin forests; soil vertical fitting method; soil stratification method; soil organic carbon density;

分类号：S153.6

摘要：以海南尖峰岭、霸王岭、五指山、吊罗山、鹦哥岭5个热带原始森林土壤为研究对象,分层采集0–100 cm的土壤样品并分析有机碳含量,用纵向拟合法和分层估算法分别估算其土壤有机碳密度。结果显示:(1)纵向拟合法计算的5个热带原始森林土壤有机碳密度分别为14.98、18.46、16.48、18.81、16.66 kg·m–2,分层估算法分别为14.73、16.24、15.50、16.91、15.03kg·m–2,前者显著高于后者(p<0.05);未经扰动的原始森林土壤,宜采用纵向拟合法计算土壤有机碳密度。(2)5个热带原始森林0–30 cm表层土壤有机碳含量分别占0–100 cm的50.50%、48.56%、43.49%、47.37、42.88%。(3)土壤有机碳密度与森林群落Shannon-Wiener指数(p<0.01)、Simpson指数(p<0.05)、物种丰富度(p<0.01)、土壤容重(p<0.001)存在极显著或显著的负相关关系;与海拔(p<0.05)、土壤孔隙度(p<0.001)、土壤全氮含量(p<0.001)存在极显著或显著的正相关关系;与坡向、林分生物量、平均胸径、平均树高无显著相关关系(p>0.05)。(4)由于海南地处低纬度地区,其丰富的降水和持续高温条件加速了有机质的分解和物质的再循环,导致海南森林土壤碳密度远低于全国平均水平。
Aims Estimating soil organic carbon（SOC） density and influence factors of tropical virgin forests in Hainan Island provide new insight in basic data for SOC pool estimation and its dynamics study. Methods The main distribution areas of tropical virgin forests in Jianfengling（JFL）, Bawangling（BWL）, Wuzhishan（WZS）, Diaoluoshan（DLS）, Yinggeling（YGL） of Hainan Island were selected, and soil samples（0–100 cm） were sampled and analyzed. SOC density was estimated by soil vertical fitting method and soil stratification method to discover the distribution characteristics of soil organic carbon in tropical virgin forests of Hainan Island.Important findings Results showed that：（1） The average SOC density using soil vertical fitting method in JFL, BWL, WZS, DLS and YGL was 14.98, 18.46, 16.48, 18.81, 16.66 kg·m^–2, respectively, which was significantly higher（p〈0.05） than the estimated average SOC density using soil stratification method in these areas（14.73, 16.24, 15.50, 16.91, 15.03 kg·m^–2, respectively）. It is better to use soil vertical fitting method for SOC density estimation when the soil was natural without disturbance.（2） The proportion of SOC content in the first 0–30 cm depth interval out of SOC in the whole 0–100 cm soil profiles in JFL, BWL, WZS, DLS and YGL was 50.50%,48.56%, 43.49%, 47.37%, 42.88%, respectively.（3） SOC density was significantly negative correlated with Shannon-Wiener index, Simpson index, species richness, and soil bulk density; and was significantly positive correlated with altitude, soil porosity, and soil nitrogen. However, SOC density was not significantly correlated to slope, biomass, average diameter at breast height, or average height.（4） Our study area Hainan was located in low latitude area with high rainfall and high temperature, which accelerated the decomposition of organic matter and nutrient recycling, resulting in significantly lower SOC densities in this tropical virgin forests of Hainan Island than the average value in China.