宝天曼自然保护区森林土壤碳氮储量分布格局分析  

Distribution Patterns of Soil Organic Carbon and Nitrogen Storage in Forestland of Baotianman Nature Reserve

作　　者：彭舜磊[1] 王华太 陈昌东[1] 齐光[1] 赵干卿[1] 

机构地区：[1]平顶山学院低山丘陵区生态修复重点实验室,河南平顶山467000 [2]平顶山学院资源与环境科学学院,河南平顶山467000

出　　处：《水土保持研究》2015年第5期30-34,共5页Research of Soil and Water Conservation

基　　金：河南省教育厅科学技术重点研究项目"伏牛山森林近自然度评价及可持续经营技术研究"(12B18003);中国博士后科学基金"台风对天童常绿阔叶林养分迁移的影响"(2014M561043)

摘　　要：森林土壤碳氮储量是森林生态系统物质循环的基础,关系着全球的气候变化。为了认识宝天曼森林土壤碳氮储量的分布格局,以内乡宝天曼自然保护区森林土壤为研究对象,采用土壤剖面调查方法,分析比较了内乡宝天曼土壤碳氮储量和碳氮比与海拔、林龄和土壤类型的关系。结果表明：该区域森林土壤碳储量为14.24-137.97t/hm^2,平均值为82.05t/hm^2,土壤氮储量在0.75-6.89t/hm^2范围,平均值为3.98t/hm^2;土壤碳氮储量与海拔和林龄符合正相关的线性关系,随着海拔的升高和林龄的增大而升高,变化趋势明显,碳氮比保持在20左右;土壤碳氮储量在不同林型间的差异很大;不同土壤类型之间,山地棕壤的碳氮储量极显著高于山地黄棕壤和山地褐土（p〈0.01）。该研究揭示了宝天曼自然保护区森林土壤碳氮储量的空间分布规律,对于宝天曼自然保护区森林应对气候变化、森林植被恢复及森林生态系统的管理和保护具有重要的指导意义。Soil organic carbon（SOC）and nitrogen in forestland are the basis for material recycling in the forest ecosystems,and which are significantly correlated with global climate change.In order to understand the strorage distribution patterns of SOC and nitrogen in Baotianman Nature Reserves,we used soil profile survey method to study the relationship between the SOC,nitrogen storage and C∶N ratio with altitude,forest age,and soil types in Baotianman Nature Reserve.The results showed that the amount of forest SOC storage ranged from 14.24t/hm^2 to 137.97t/hm^2,with an average of 82.05t/hm^2 in the 0—30cm soil layer,the value of soil nitrogen storage ranged from 0.75t/hm^2 to 6.89t/hm^2,with an average of 3.98t/hm^2.SOC and nitrogen storage was significantly lineated with the altitude and forest age（p〈0.05）,and positively increased with altitude and forest age increasing.SOC and nitrogen storage showed the differences among the different forest types.SOC and nitrogen storage of the brown soil was significantly greater than that of the yellow brown soil and cinnamon soil（p〈0.01）.However,C∶N ratio was stable with the value of about 20,and did not significantly change with altitude and soil types（p〉0.05）.This study revealed the distribution patterns of SOC and nitrogen storage in Baotianman forest region,and was very important for guiding climate change mitigation,forest restoration,and forest ecosystem management and protection in Baotianman Nature Reserve.

关 键 词：宝天曼自然保护区 土壤类型 碳氮储量 碳氮比 海拔 林龄 

分 类 号：S512.7[农业科学—作物学]