Performance Analysis for the Domestic TDP Sensor forM easuring Sap Flow in Trees

ZHANG Jin-song; MENG Ping; LIU Wei; SHI Sheng-jin; WANG He-song; GAO Jun; REN Qing-fu

Taking who le??tree we ighing method (MBW ) as criterion, and compared w ith sim ilar sensormade by Dynamax (mdTDP) , the performance o f domestic TDP sensor ( cfTDP) were assessed by measuring the sap flow (SF )and transp iration rate (TR ) of Ligustrum leucadendra and Quercus variabilis as testmaterials. The results are as fo llows: ( 1) TheTR o f had good correlation w ith SF derived from the cfTDP method and therew as no sign ificant differ??ence betw een them (P < 0. 05) . The linear correlat ion coefficient betw een the average value o fTR and that ofSF in 30m inutes w as 0. 90 ( n= 215), the maximum was 0. 99 daily. Them ax ima,l m inima l and average values of re lat ive error betw een the to talTR and the totalSF da ily w ere 13. 3% , 0. 5% and 8. 7% respective ly. ( 2) The da ily sap fluxdensity value derived from the cfTDP method had complete consistencyw ith that derived from mdTDP method.

1. Research In stitu te of Forestry, CAF

2. Key Laboratory ofT ree Breeding and Cu ltivat ion, State Fores try Admin istrat ion, Bej ing?? 100091, Ch ina

Received Date: 2007-01-12

Abstract: Taking who le??tree we ighing method (MBW ) as criterion, and compared w ith sim ilar sensormade by Dynamax (mdTDP) , the performance o f domestic TDP sensor ( cfTDP) were assessed by measuring the sap flow (SF )and transp iration rate (TR ) of Ligustrum leucadendra and Quercus variabilis as testmaterials. The results are as fo llows: ( 1) TheTR o f had good correlation w ith SF derived from the cfTDP method and therew as no sign ificant differ??ence betw een them (P < 0. 05) . The linear correlat ion coefficient betw een the average value o fTR and that ofSF in 30m inutes w as 0. 90 ( n= 215), the maximum was 0. 99 daily. Them ax ima,l m inima l and average values of re lat ive error betw een the to talTR and the totalSF da ily w ere 13. 3% , 0. 5% and 8. 7% respective ly. ( 2) The da ily sap fluxdensity value derived from the cfTDP method had complete consistencyw ith that derived from mdTDP method.

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Reference (10)

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Performance Analysis for the Domestic TDP Sensor forM easuring Sap Flow in Trees

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References

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通讯作者: 陈斌, bchen63@163.com

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