北京林业大学学报2019，Vol.41Issue(2)：19-28,10.DOI:10.13332/j.1000--1522.20180383
江西九连山不同海拔梯度土壤有机碳的变异规律
Variations in soil organic carbon along an altitudinal gradient of Jiulian Mountain in Jiangxi Province of eastern China
摘要
Abstract
[Objective]Soil type, soil layer and stand type are considered as major factors affecting the distribution of soil organic carbon. Meanwhile, an altitudinal gradient is a redistribution of hydrothermal conditions at large-scale environments, and often involve the variations of soil and vegetation types at small scale. Therefore, there is an important significance for carbon sequestration management in forestecosystem to explore the variations of soil organic carbon along an altitudinal gradient (179-1 430 m) .[Method]Twenty soil profiles distributed with five soil layers along an altitudinal gradient in Jiulian Moutain were sampled. Moreover, vegetation type, soil type, soil organic carbon content and soil carbon storage were recorded for these soil samples to explore the vertical distribution and influencing factor of soil organic carbon along an altitudinal gradient. [Result] The organic carbon content of top three soil layers (0-40 cm) increased linearly with the increase of elevation, whereas that of the bottom two layers (40-60 cm and 60-100 cm) decreased linearly with the increase of elevation. The pattern of soil carbon storage with elevations was similar with that of soil organic carbon content. However, there was a"U"shape between total soil carbon storage and elevation; Soil organic carbon content and carbon storage of top three soil layers in meadow soil were generally higher than those in red soil or yellow soil, the organic carbon content and carbon storage of top soil layer (0-20 cm) increased with the altitudinal gradient from red soil, yellow soil to meadow soil, meanwhile there was no significant difference among other layers. Soil organic carbon content and carbon storage of top three soil layers for Rhododendron woods and alpine meadow in high elevation were generally higher than those for the other vegetation types in low elevation, and there was the highest total carbon storage with 0-100 cm in alpine meadow and secondary broadleaved forest. [Conclusion] These results indicate that variations of top soil layer and vegetation types are the major factors to drive the variations of soil organic carbon along an altitudinal gradient in Jiulian Mountain of eastern China. The carbon emission of top soil layers in high elevation may increase with the increase of air temperature under the global warming.关键词
有机碳含量/碳储量/土壤类型/植被类型/土壤层次Key words
organic carbon content/carbon storage/soil type/stand type/soil layer分类
农业科技引用本文复制引用
张参参,吴小刚,刘斌,施雪文,陈伏生,裘利洪,卜文圣..江西九连山不同海拔梯度土壤有机碳的变异规律[J].北京林业大学学报,2019,41(2):19-28,10.基金项目
国家自然科学基金项目(31760134、31730014) （31760134、31730014）
江西省自然科学基金项目(20171BAB214032) （20171BAB214032）
江西九连山森林生态系统国家定位观测研究站运行补助项目 （）
