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[1]YAN En-ping,LIN Hui,HONG Yi-feng,et al.Analysis on LAI Estimation and Its Effecting Factors for Chinese Fir Plantation[J].Research of Soil and Water Conservation,2013,20(04):75-81.

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Analysis on LAI Estimation and Its Effecting Factors for Chinese Fir Plantation

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 04 Page number: 75-81 Column: Public date: 2013-08-28

Title:: Analysis on LAI Estimation and Its Effecting Factors for Chinese Fir Plantation

Author(s):: YAN En-ping¹, LIN Hui¹, HONG Yi-feng², ZHANG Yu¹, CHEN Li¹; 1. Research Center of Forest Remote Sensing & Information Engineering, Central South University of Forestry & Technology, Changsha 410004, China;
2. East China Monitoring Center of the Forest Resources, State Forestry Administration, Hangzhou 310019, China

Keywords:: remote sensing; leaf area index; regression model; SPOT 5; Chinese fir plantation

CLC:: S718.55

DOI:: -

Abstract:: Leaf area index (LAI) is one of the most important parameters for monitoring vegetation growth. In order to provide reference for LAI monitoring across large region, the study of LAI estimation and its effecting factors was conducted, which was carried out on Huang Fengqiao Forest Farm, You county, Hunan province, China. Based on the SPOT 5 data and ground survey data, sixteen LAI estimation models were constructed for determining the most suitable LAI estimation model and impact factor by using correlation analysis and regression analysis among four vegetation indexes (NDVI, SAVI, MSAVI and MCARI). The results show that the correlation between four vegetation indexes and fir leaf area index was strong, which were MCARI, SAVI, MSAVI, NDVI correspondingly. Among them, the exponential regression model with NDVI as the independent variable [y=1.031exp(3.379x)] has the highest estimation accuracy (87.69%). The LAI of fir tended to increase with the rise of group ages. The highest LAI value existed in the mature forest, while the lowest LAI value was found in the young forest, and the difference value between these two forests was 0.3. Two fir groups with various slope aspects show significant difference in LAI values, and values from the fir with a half-sunny slope were obviously higher than others. It can be concluded that group age and slope aspect were two important factors affecting the LAI of Chinese fir planation, and the primary factor limiting the growth and distribution of fir plantation was wet condition, followed by temperature.

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