祁连山中段青海云杉林土壤有机碳分布特征对海拔的响应  

Responses of Soil Organic Carbon Distribution Characteristics to Altitude in Picea crassifolia Forest in the Middle Qilian Mountains

作　　者：蒋志仁 蒋志成 王军梅 冯金元 JIANG Zhiren;JIANG Zhicheng;WANG Junmei;FENG Jinyuan(Qilian Management Station,Gansu Qilian Mountain National Nature Reserve,Wuwei,Gansu 733000,China;Management Center,Gansu Qilian Mountain National Nature Reserve,Zhangye,Gansu 734000,China;Wushaoling Management Station,Qilian Mountain National Nature Reserve,Wuwei 733000,Gansu,China;Xiama Management Station,Gansu National Qilian Mountain Nature Reserve,Tianzhu 733000,Gansu,China)

机构地区：[1]甘肃祁连山国家级自然保护区祁连自然保护站,甘肃武威733000 [2]甘肃祁连山国家级自然保护区管护中心,甘肃张掖734000 [3]甘肃祁连山国家级自然保护区乌鞘岭自然保护站,甘肃武威733000 [4]甘肃祁连山国家级自然保护区夏玛自然保护站,甘肃天祝733000

出　　处：《西北林学院学报》2025年第1期51-58,共8页Journal of Northwest Forestry University

基　　金：甘肃省陇原青年创新创业人才(个人)项目(2023LQGR12)。

摘　　要：研究祁连山青海云杉林不同海拔和土层的有机碳含量和有机碳密度的分布特征对于维护高寒山地地区的碳平衡具有重要意义。2021年7月于海拔2700、2900、3100、3300 m的青海云杉林样地挖取不同土层土样进行处理,通过Kruskal-Wallis方差分析和单因素方差分析不同海拔、不同土层之间的有机碳含量和有机碳密度的差异,采用Adonis多元方差分析海拔对土壤有机碳含量和土壤有机碳密度差异的影响。结果表明,各海拔样地土壤有机碳含量随着土层的增加均呈减小的趋势,而土壤有机碳密度随着土层的增加没有明显趋势。该区域土壤有机碳含量平均范围在127.63~62.17 g/kg,土壤有机碳密度在5.53~4.28 kg/m^(2),土壤有机碳含量和土壤有机碳密度除了海拔2900 m没有差异,其余海拔样地表层土壤与深层土壤均存在显著差异。随着海拔变化,不同土层土壤有机碳含量的差异集中在10 cm土层,而土壤有机碳密度的差异集中在10 cm和20 cm土层。海拔对各土层有机碳形成的差异均有显著影响,仅显著影响10、20 cm土层土壤有机碳密度形成的差异。土壤有机碳分布特征对海拔的变化比土壤有机碳密度更加敏感。Understanding the distribution characteristics of soil organic carbon and soil organic carbon density at different altitudes and soil layers in Picea crassifolia plantation in the Qilian Mountains is of great significance for maintaining carbon balance in the alpine mountains.In July 2021,soil samples of different layers were collected from the plots of Picea crassifolia plantations at the altitudes of 2700,2900,3100,and 3300 m in the study area.The soil samples were subject to different measurements,such as soil volume weight,soil organic carbon density.The differences of soil organic carbon(SOC)and soil organic carbon density(SOCD)between different soil layers at different altitudes were analyzed by Kruskal-Wallis ANOVA and one-way ANOVA.Adonis multivariate variance was used to analyze the effects of altitude on SOC and SOCD.The results showed that the SOC decreased with the increase of soil layer at all altitudes,while the SOCD showed no obvious trend with the increase of soil layer.The average range of SOC in this region was 127.63-62.17 g/kg,and the SOCD was 5.53-4.28 kg/m^(2).There was no difference between SOC and SOCD except for the altitude of 2900 m,and there were significant differences between surface soil and deep soil in the rest of the altitudes.With the change of altitude,the difference of SOC in different soil layers was concentrated in the 10 cm soil layer,while the difference in SOCD was concentrated in the 10 cm and 20 cm soil layers.Altitude had a significant effect on the difference of SOC formation in each soil layer,and only significantly affected the difference in the formation of SOCD in the 10 and 20 cm soil layers.The distribution characteristics of SOC are more sensitive to changes in altitude than soil organic carbon density.

关 键 词：祁连山 土层深度 海拔梯度 土壤有机碳 土壤有机碳密度 

分 类 号：S714.2[农业科学—林学]