摘要
研究林型对土壤有机碳(SOC)的影响,是采取合理林业管理措施的关键。以甘肃省会宁县为研究区,对3种林型(杏树林、白杨林、柳树林)的土壤SOC进行了对比研究。结果发现:在立地条件相似的情况下,3种林型土壤SOC均随土壤深度的增加而降低,其值变化范围分别为2.85～19.05、1.67～11.97和1.80～16.05 g·kg^(-1)。杏树林土壤SOC显著高于白杨林和柳树林,但保水能力却低于白杨林;SOC与容重、pH呈显著负相关;影响白杨林土壤SOC的主导因子为含水量,影响柳树林土壤SOC的主导因子为pH与含水量,而影响杏树林土壤SOC的主导因子为pH与容重。该研究结果表明,在半干旱地区实施造林时,如只考虑水土保持效益,白杨林是首选林种;如只考虑固碳潜力,则杏树林对减排增汇尤为重要。
Exploring the effects of forest types on soil organic carbon (SOC)is critical for facili- three forest types decreased with increasing soil depth.SOC content of the apricot forest ranged from 2.85g ·kg-1to 19.05g ~kg-1,while for the poplar forest and willow forest,it ranged from 1.67g ·kg-1to 11.9g ·kg-1,and from 1.80g ·kg-1to 16.05g ·kg-1,respectively.The apri- cot forest had significantly higher SOC content than the poplar forest and willow forest,but lower water conservation capacity than the poplar forest.SOC content was significantly negatively corre- lated to soil bulk density and pH across the three forest types.Soil water content was the dominant lar should be the preferred species if only considering the benefits of soil and water conservation. If only considering the potential of carbon sequestration,however,the apricot forest is particular- ly important for reducing emission and enhancing carbon sink.
作者
李梦天
秦燕燕
曹建军
许雪贇
龚毅帆
LI Meng-tian;QIN Yan-yan;CAO Jian-jun;XU Xue-yun;GONG Yi-fan(College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730000,China;Cold and Arid Regions Environmental Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2018年第12期3541-3548,共8页
Chinese Journal of Ecology
基金
国家自然科学基金项目(41461109)
甘肃省自然科学基金项目(1506RJZA124)
中国科学院内陆河流域生态水文重点实验室开放基金(KLEIRB-ZS-16-01)资助
关键词
植树造林
黄土高原
林型
土壤有机碳
节能减排
afforestation
Loess Plateau
forest type
soil organic carbon
energy conservation and emission reduction
作者简介
李梦天,女,1993年生,硕士研究生,从事环境工程与草地生态学等研究。E—mail:limtl9@yeah.net;通讯作者:曹建军,E—mail:caojj@nwnu.edu.cn.
