祁连山七一冰川梯度因子四季变化特征与土壤呼吸关联性分析  

Correlation analysis of seasonal variation characteristics of Qiyi glacier gradient factors with soil respiration in Qilian Mountains

作　　者：李元鸿 赵芯 袁心洁 蔡仪威 李桂英[2] 安太成[2] LI Yuanhong;ZHAO Xin;YUAN Xinjie;CAI Yiwei;LI Guiying;AN Taicheng(National Nature Reserve Management and Conservation Center of Qilian Mountain in Gansu Province(Giant Panda Qilian Mountain National Park Gansu Bureau Zhangye Branch),Zhangye 734000,China;Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health,Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control,School of Environmental Science and Engineering,Institute of Environmental Health and Pollution Control,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]甘肃祁连山国家级自然保护区管护中心(大熊猫祁连山国家公园甘肃省管理局张掖分局),甘肃张掖734000 [2]广东工业大学环境健康与污染控制研究院,环境科学与工程学院,粤港澳污染物暴露与健康联合实验室,广东省环境催化与健康风险控制重点实验室,广州510006

出　　处：《农业环境科学学报》2022年第7期1610-1618,共9页Journal of Agro-Environment Science

基　　金：粤桂联合基金—重点项目(2020B1515420002);广东省科技计划项目(2021A0505030070);国家自然科学基金项目(41877363)。

摘　　要：为了研究四季变化过程中冰川梯度因子对其表面土壤呼吸强度的影响,利用七一冰川观测站2020年9月至2021年6月的实时观测数据,整理分析了观测站地面高度分别为5、10、15、20 m和25 m处观测点的光合有效辐射、空气温度、土壤CO_(2)浓度等因子在3、6、9、12月份的数据,以土壤CO_(2)浓度、土壤水汽浓度表征土壤呼吸强度,获得了冰川表面土壤呼吸强度变化规律及其影响因素。结果表明:冬季土壤CO_(2)浓度稳定在441.3μmol·mol^(-1),在四季中处于较高水平,而土壤水汽浓度稳定在0.479 mmol·mol^(-1),在四季中处于较低水平。夏季土壤呼吸强度与各梯度空气温度呈正相关关系,与各梯度光合有效辐射值在正午时间段呈正相关关系,在早晚时间段呈负相关关系。春秋两季土壤呼吸强度与各梯度空气温度呈正相关关系,春季土壤呼吸强度与各梯度光合有效辐射值的关系因时间段不同而不同。此外春秋两季由于存在逆温现象,以及融雪、太阳辐射等原因,其平均空气温度最高在观测点10 m处,最低在25 m处。研究所得的各梯度因子四季变化情况与土壤呼吸强度的相关性,显示出祁连山冰川与表面土壤呼吸之间具有一定的科学性关联。To measure the effects of gradients and factors on soil respiration intensity on the surface of glaciers in the four seasons,this study used real-time observation data from the Qiyi Glacier Observation Station from September 2020 to June 2021 to analyze photosynthetically active radiation,air temperature,soil respiration carbon dioxide concentration,and other factors at 5,10,15,20 m,and 25 m above the observation station in March,June,September,and December.The soil respiration intensity was characterized by the soil respiration carbon dioxide concentration and soil respiration water vapor concentration,and the variation law and influencing factors of soil respiration intensity on the surface of glaciers were obtained.The results showed that the soil respiration carbon dioxide concentration in winter was stable at 441.3μmol·mol^(-1),which was at a high level in the four seasons,and the soil respiration water vapor concentration was stable at 0.479 mmol·mol^(-1),which was at a low level in the four seasons.Soil respiration intensity positively correlated with the atmospheric temperature of each gradient,positively correlated with the photosynthetically active radiation value of each gradient at noon,and negatively correlated in the morning and evening.A positive correlation between soil respiration intensity and atmospheric temperature of each gradient in spring and autumn,and the relationship between soil respiration intensity and photosynthetically active radiation of each gradient also varied with time.In addition,due to the temperature inversion phenomenon,snow melting and solar radiation in spring and autumn,the average air temperature was the highest at 10 m and the lowest at 25 m at the observation point.The correlation analysis between the changes of each gradient factor in four seasons and soil respiration intensity showed that there was a certain scientific relationship between Qilian Mountain glaciers and surface soil respiration.

关 键 词：七一冰川 土壤呼吸 光合有效辐射 空气温度 水汽浓度 

分 类 号：S154[农业科学—土壤学]