冷温帯落葉広葉樹林生態系における土壌呼吸速度の時・空間変動 : 1.面的変動の計測と要因解析
Temporal and spatial variability of soil respiration in a cool temperate broad leaved forest : 1.Measurement of spatial variance and factor analysis

Shugang JIA, Tsuyoshi AKIYAMA, Wenhong MO, Motoko INATOMI, Hiroshi KOIZUMI
2003 Nihon Seitai Gakkaishi  
Japan ) , Motoko INA 「 ( )MI ( The United Graduate School or Agricultural Science、 Gifu Universi 〔 y, Gifu 501 − ll93 , 亅乱 pan), Hiroshi Ko 【 zuMI ( River Basin Research Center, Gifu Universi 〔 y, Gifu 501 . − lI93 , 亅apan ) .ノa ρ anese / ourna -qズ E '} ology 53 : 13 − 22 ( 2003) Soil respiration rates and their re ] Eltillg nlicro − enyironmental 「 act { )「s ・ wc 「c mcasu 「ed in September in 1999 and 2000 to clar 晦 [hc con 【 rolling factors of soih ・ espiration I ・ ates in a cool tempel − ate
more » ... cool tempel − ate broad − 1eaved deciduous forest . The smdy site was located on a southwestern slope of M し Norikura at about 1, 400 m usl . Thc sitc contained an experimental と しrea of one llectare , subdivided into [ OO sub − pk )【s , cach 10 m by 10 m ill size . The rate of soH respiration 、 、 ・ as meag . ured by the closed chamber method , The micro environmcn 【 al ね ck 〕rs examined includcd temPeratu 【 ' e ( air . soiD , soil water contents , COz cc )ncentrati 〔)n . biomass ( tree. understory vegeta − tion ) 、 sojl nitrogen and carbon contents 、 thickness of soil layers. and topographic conditions , Results o 「 multiple r − egression analysis were as t ' oltows : 1) Ralc { }「 s . oi [ rcs. pirati 〔)n was stronglyaf 干 ected by topographic condltions , being 5 12% higher at the sunlmitofthe hill and 25 % lower at 吐 he boUom o ゼthc va [ [ e } . . 、 compared with the average .2)Multiple regre ∬ ion 乱 nalysis o1 − 2 − ycar data using the stepwise metllod clarified that P ( SR = 27, 94 Xts − 0, 58 Xcθ、 十 3. 26 . ¥α 十 . 17. 89 Xt . 一 . 1. 74 . ¥w 十 118. 44 ( R2 = 0, 707) where レ 宝 ・ κ is the soH respira 【k〕n rate 、 ・ ¥, δthe soil temperature at − [ Ocm , X α 丿, the CO ≧ . concelltl ' a − tion at Ocrn , ・ ¥a thc relative altitude , ・ ¥' the thickness oflitter layers and Xu 」 thc soil waLcr conlcn1 . 3)The measured son respiration rate was high in 1999 ( 4082 mgCO2m −2h −] on average )and low in 2000 ( 354. O mgCO2m − 2h − 】 on avcragc ) , refiecting previous rainfa11 . The soil water contents in 1999and 2000 were 33. 6% and 20. 8%, rcspectively . Environmental factors in l999 、 -・ ere stiH unstabLe after p 【 enty o 「rain 「 all . The high moisture content
doi:10.18960/seitai.53.1_13 fatcat:mwmiojpfpfhuvfadykdms7e6am