东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
6期
53-57
,共5页
胡兆永%陈书军%庞军柱%张硕新
鬍兆永%陳書軍%龐軍柱%張碩新
호조영%진서군%방군주%장석신
秦岭%油松%土壤热通量%净辐射
秦嶺%油鬆%土壤熱通量%淨輻射
진령%유송%토양열통량%정복사
The Qinling Mountains%Pinus tabulaeformis%Soil heat flux%Net radiation
以2012年1月1日-12月31日土壤热状况的实测数据为基础，研究了秦岭火地塘林区油松林土壤热通量的变化特征及其与净辐射的关系。结果表明：10和20 cm层土壤非生长季和生长季热通量的日变化均呈“S”型，且前者振幅较大；两层土壤3-8月的热通量月累计均为正值，其它月份累计均为负值，月总值占净辐射的比例变动范围分别为-17．50％～3．11％和-18．61％～3．72％；10和20 cm层土壤年总热通量分别为-2．33、-2．16 MJ· m-2，说明就全年尺度而言，土壤是热源；在日尺度和月尺度水平上，土壤热通量和净辐射均为极显著正相关；土壤热通量对净辐射的反馈存在延时效应，10 cm层在非生长季反馈要延滞3 h，生长季为4 h；而20 cm层的反馈延滞在非生长季为5 h，生长季为7 h。
以2012年1月1日-12月31日土壤熱狀況的實測數據為基礎，研究瞭秦嶺火地塘林區油鬆林土壤熱通量的變化特徵及其與淨輻射的關繫。結果錶明：10和20 cm層土壤非生長季和生長季熱通量的日變化均呈“S”型，且前者振幅較大；兩層土壤3-8月的熱通量月纍計均為正值，其它月份纍計均為負值，月總值佔淨輻射的比例變動範圍分彆為-17．50％～3．11％和-18．61％～3．72％；10和20 cm層土壤年總熱通量分彆為-2．33、-2．16 MJ· m-2，說明就全年呎度而言，土壤是熱源；在日呎度和月呎度水平上，土壤熱通量和淨輻射均為極顯著正相關；土壤熱通量對淨輻射的反饋存在延時效應，10 cm層在非生長季反饋要延滯3 h，生長季為4 h；而20 cm層的反饋延滯在非生長季為5 h，生長季為7 h。
이2012년1월1일-12월31일토양열상황적실측수거위기출，연구료진령화지당림구유송림토양열통량적변화특정급기여정복사적관계。결과표명：10화20 cm층토양비생장계화생장계열통량적일변화균정“S”형，차전자진폭교대；량층토양3-8월적열통량월루계균위정치，기타월빈루계균위부치，월총치점정복사적비례변동범위분별위-17．50％～3．11％화-18．61％～3．72％；10화20 cm층토양년총열통량분별위-2．33、-2．16 MJ· m-2，설명취전년척도이언，토양시열원；재일척도화월척도수평상，토양열통량화정복사균위겁현저정상관；토양열통량대정복사적반궤존재연시효응，10 cm층재비생장계반궤요연체3 h，생장계위4 h；이20 cm층적반궤연체재비생장계위5 h，생장계위7 h。
With the soilthermal measurements from January 1 to December31 , 2012 , we studiedthe characteristics of soil heat fluxes and the relationship betweensoil heat fluxes and solar net radiation in Pinus tabulaeformis forest at Huoditang forest region in the Qinling Mountains.The diurnal changes of soil heat fluxes at 10 cm depth and 20 cm depth have an “S”shape both in the growing season and non-growing season.The fluctuation of soil heat at 10 cm depth is stronger than that at 20 cm.The value of monthly accumulation of soil heat fluxes from March to August at 10 cm and 20cm depth are posi-tive, while there isnegative value in other months.The proportion of monthlysoil heat fluxes to the net radiation at the two depth ranges from -17.50%to 3.11%and -18.61%to 3.72%, respectively.The total soil heat fluxes in a year at 10 cm and 20 cm depth are -2.33 and -2.16 MJ· m-2 , respectively, indicating that the soil is a heat source at the annual temporal scale.Significant correlations between the soil heat fluxes and net radiation were observed at both 10 cm and 20 cm depth at daily and monthly annual temporal scales.There is time-lag effect in soil heat fluxes to net radiation, with three hours’ time-lag in growing season and four hours’ time-lag in non-growing season at 10 cm depth and five hours’ time-lag in growing season and seven hours’ time-lag in non-growing season at 20 cm depth.
