果树冠层太阳总辐射与净辐射分形特征的相关分析

doi:10.11707/j.1001-7488.20050101

Scientia Silvae Sinicae ›› 2005, Vol. 41 ›› Issue (1): 1-4.doi: 10.11707/j.1001-7488.20050101

Fractal Characteristics Correlation between the Solar Total Radiation and Net Radiation on the Apple Tree Canopy

Meng Ping^1,2,Zhang Jinsong¹,Gao Jun¹

1.Research Institute of Forestry CAF Key Laboratory of Forest Silviculture of the State Forestry Administration Beijing100091; 2.Central South Forestry University Changsha410004

Received:2003-10-21 Revised:1900-01-01 Online:2005-01-25 Published:2005-01-25

Abstract

Abstract:

The characteristics correlation between solar total radiations(Q) and net radiation(R_n) on the apple tree canopy at mainly growth stage in the hilly of Taihang Mountain are analyzed with fractal theory based on regression analysis. The results showed that:1)Q and R_n had good liner correlation. The regression function was as the following:R_n=0.7408Q-32.436, which coefficient r is 0.981 1(n=26 279), F_cal=343 665.2 >>F^0.01 ₂₆₇₇=6.63;2)The fractal dimension curves of Q and R_n both had two no-scaling regions, which circumscription time value of the inflexion was 453 and 441 minutes respectively.In the first region, fractal dimensions of Q and R_n was 1.112 6, 1.131 9 respectively,and 1.913 6、 1.883 4 in the second region.Those information showed that fractal characteristics of Q and R_n is similar. So R_n can be calculated with Q on the apple tree canopy.

Key words: apple tree, solar total radiation, net radiation, regression analysis, fractal characteristics

Meng Ping;Zhang Jinsong;Gao Jun. Fractal Characteristics Correlation between the Solar Total Radiation and Net Radiation on the Apple Tree Canopy[J]. Scientia Silvae Sinicae, 2005, 41(1): 1-4.

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Fractal Characteristics Correlation between the Solar Total Radiation and Net Radiation on the Apple Tree Canopy

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