2009–2016年北亚热带常绿落叶阔叶混交林土壤水分含量数据集  

A dataset of soil moisture in a northern subtropical mixed evergreen and deciduous broad-leaved forest(2009–2016)

作　　者：赵常明[1] 申国珍[1] 徐文婷[1] 熊高明[1] 樊大勇[1] 周友兵[1] 葛结林[1] 谢宗强[1] Zhao Changming;Shen Guozhen;Xu Wenting;Xiong Gaoming;Fan Dayong;Zhou Youbing;Ge Jielin;Xie Zongqiang(State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,P.R.China)

机构地区：[1]中国科学院植物研究所,植被与环境变化国家重点实验室,北京100093

出　　处：《中国科学数据（中英文网络版）》2020年第2期95-105,共11页China Scientific Data

基　　金：CERN监测网络,国家生态系统观测研究共享服务平台项目(2005DKA10300)。

摘　　要：土壤水分含量是研究土壤水分状况和动态的基础指标,是陆地生态系统水环境长期定位观测的重要指标之一。常绿落叶阔叶混交林是我国北亚热带地带性的植被类型。研究区域位于湖北西部神农架地区,是三峡库区和南水北调中线工程的重要集水区。本数据集收集了湖北神农架森林生态系统国家野外科学观测研究站暨中国科学院神农架生物多样性定位研究站(简称神农架站)2009年5月至2016年12月的土壤水分含量数据,总数据量7425条。测定方法为时域反射法(Time Domain Reflectometry,TDR)定点连续观测,观测深度为0–10 cm、10–20 cm、20–30 cm、30–40 cm、40–50 cm,观测频度为每月2次。在20 m×5 m(水平投影)的人工径流场的上部、中部和下部分别埋设了3根测管,共9根测管。用户可以按照观测时间、观测深度和坡位进行数据检索。初步统计表明:1)常绿落叶阔叶混交林2009–2016年土壤水分含量(体积比)平均值为0.313±0.165,最大值为0.647,最小值为0.000。2)2009年(5-12月)土壤水分含水量最大,为0.342;其次2012年,为0.340。2010年最小,为0.293。3)1月土壤水分含水量最高,为0.343;其次为11月,0.342。8月土壤水分含量最低,为0.271;其次为7月,0.291。4)土壤水分含量从上层到下层逐渐增加,10–50cm土层分别为0.084(±0.070)、0.222(±0.092)、0.359(±0.108)、0.431(±0.078)和0.468(±0.065)。5)2009–2012年0–50 cm土壤平均储水量为156.99(±56.99)mm,相当于1569.9(±186.6)t/hm2。北亚热带常绿落叶阔叶混交林土壤水分含量数据库的建立与共享,为理解水利工程集水区水分涵养和水量调节功能提供了重要数据支持,为理解未来全球变化条件下该类型森林的土壤水分动态特征及其对气候变化的响应提供了数据支撑,对区域森林生态系统水量平衡和水文循环具有重要意义,有助于提升常绿落叶阔叶混交林森林水文学的科学研究,对推动我�Soil moisture content is the basic indicator for studying soil moisture conditions and dynamics,and it is one of the important indicators for long-term observation of terrestrial ecosystem water environment.Evergreen deciduous broad-leaved mixed forest is a zonal vegetation type in the northern subtropical zone of China.The observation area is located in the Mount.Shennongjia Area in western Hubei Province,which is the important catchment area of the Three Gorges Reservoir and the middle route of the south-to-north water diversion project.This dataset collected soil moisture content data from May 2009 to December 2016 at the National Observation and Research Station for Forest Ecosystem in Shennongjia,Hubei,China(also known as Shennongjia Biodiversity Research Station of the Chinese Academy Sciences,SNF for short),with a total of 7,425 entries.The determination method is fixed-point continuous observation by instrument of Time Domain Reflectometry(TDR).The observation depths are 0–10 cm,10–20 cm,20–30 cm,30–40 cm and 40–50 cm with observation frequency of 2 times per month.There are 9 measuring tubes in total.Each three measuring tubes are buried in the upper part,middle part and lower part respectively of the artificial runoff field of 20 m×5 m(horizontal projection).Users can conduct data retrieval based on observation time,observation depth and slope position.Preliminary statistics show that:1)The average soil moisture content(volume ratio)of evergreen deciduous broad-leaved mixed forest from 2009 to 2016 is 0.313(±0.165),the maximum value is 0.647,and the minimum value is 0.000;2)In terms of soil moisture content,the highest value is 0.342 in 2009(from May to December),followed by 0.340 in 2012,and the lowest value is 0.293 in 2010;3)The soil moisture content is the highest in January,0.343,and the second highest in November,0.342;the lowest in August,0.271,followed by July,0.291;4)Soil moisture content from the upper to the lower layer gradually increases,with its values being 0.084(±0.070),0.22

关 键 词：土壤水分含量 TDR 常绿落叶阔叶混交林 北亚热带 神农架站 

分 类 号：S714.2[农业科学—林学]