摘要
为了解天然草地造林后土壤可溶性有机碳的变化,以河北塞罕坝的羊草草甸草原以及在草甸草原上营造的樟子松人工林和落叶松人工林为研究对象,比较了3种植被类型土壤表层0—30 cm的土壤可溶性有机碳、土壤总有机碳和土壤全氮等指标。结果表明,人工针叶林的土壤可溶性有机碳、土壤有机碳和土壤全氮含量均低于草甸草原,天然草地营造人工针叶林40年后土壤可溶性有机碳、土壤有机碳和土壤全氮都有所下降,人工林生态系统的土壤异质性低于草甸草原。
To determine the change of soil dissolved organic carbon (DOC) following grassland afforestation, the authors compared soil DOC, soil organic carbon (SOC) and soil total N (STN) of top 30 cm soils under Leymus chinensis meadow steppe, Pinus sylvestrls var. mongolica plantation, and Lar/x principis-rupprechtii, plantation in Saihanba, Hebei Province. DOC, SOC and STN of coniferous plantation soils were less than those of meadow steppe soils ; DOC, SOC, and STN decreased following 40-year grassland afforestation. Soil heterogeneities of coniferous plantations were lower than meadow steppes.
出处
《北京大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2009年第3期511-518,共8页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家重点基础研究发展计划项目(2002CB412502)资助