森林与环境学报2018，Vol.38Issue(2)：135-141,7.DOI:10.13324/j.cnki.jfcf.2018.02.002
武夷山不同海拔高度土壤有机碳含量变化特征
Variations of soil organic carbon content along an altitudinal gradient in Wuyi Mountain
摘要
Abstract
In order to explore the relationship between soil organic carbon(SOC) content and the four variables(including altitude, slope, bulk density and pH value), the distribution characteristics of SOC content along the altitudinal gradient ranging from 295 to 2 130 m in Wuyi Mountain Nature Reserve were analyzed and the regression model of SOC based on the main control factors was constructed. The results showed that, in the same altitude, the SOC content generally decreased with the increase of soil depth and its decreasing amplitude was also decreased. The SOC content ranging from 6.12 to 120.41 g?kg-1showed obvious surface assembly in the soil profile. The SOC content at the same soil depth generally increased with the increasing altitude, but its growth rate decreased accordingly. The SOC content was highly significantly positively correlated with altitude (P<0.01) and was negatively correlated with bulk density (P<0.01). There was significantly negative correlation (P<0.05) between SOC content and pH value only in the layer at the depth of 30-40 cm. The multiple linear regression model had higher goodness of fit than simple linear regression model for predicting SOC content. The combination of different factors can explain most of the variation of SOC in different soil layers with the explanation between 74.1% and 89.1%.关键词
武夷山/国家公园/土壤有机碳/海拔梯度/多元线性回归模型Key words
Wuyi Mountain/national park/soil organic carbon/altitudinal gradient/multivariable linear regression model分类
农业科技引用本文复制引用
程浩,张厚喜,黄智军,徐自坤,杨强,刘爱琴..武夷山不同海拔高度土壤有机碳含量变化特征[J].森林与环境学报,2018,38(2):135-141,7.基金项目
国家重点研发计划(2016YFD0600301) （2016YFD0600301）
福建省自然科学基金项目(2017J05042) （2017J05042）
福建农林大学科技创新专项基金项目(kfa17291a) （kfa17291a）
福建农林大学林学院科学基金计划项目(61201400822). （61201400822）
