Leaf Area Index (LAI) in different type of agroforestry systems based on hemispherical photographs in Cidanau Watershed

3rd International Symposium on LAPAN-IPB Satellite For Food Security and Environmental Monitoring 2016

地球科学;轻工业;生态环境科学

Khairiah, Rahmi Nur^1,2 ; Setiawan, Yudi^1,2 ; Prasetyo, Lilik Budi^1 ; Permatasari, Prita Ayu^2

Department of Forest Resource Conservation and Ecotourism, Faculty of Forestry, Bogor Agricultural University, Kampus IPB Dramaga, Bogor, Indonesia^1

Center for Environmental Research, Bogor Agricultural University, PPLH Building, Kampus IPB Dramaga, Jl. Lingkar Akademik, Bogor, Indonesia^2

关键词: Agroforestry system;    Analysis softwares;    Ecological functions;    Hemispherical photographs;    Perceived benefits;    Plant population;    Threshold methods;    Vegetation canopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/54/1/012050/pdf
DOI  :  10.1088/1755-1315/54/1/012050

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Ecological functions of agroforestry systems have perceived benefit to people around Cidanau Watershed, especially in the protection of water quality. The main causes of the problems encountered in the Cidanau Watershed are associated with the human factors, especially encroachment and conversion of forest into farmland. The encroachment has made most forest in Cidanau Watershed become bare land. To preserve the ecological function of agroforestry systems in Cidanau Watershed, monitoring of the condition of the vegetation canopy in agroforestry systems is really needed. High intensity thinning of crown density due to deforestation can change stand leaf area index dramatically. By knowing LAI, we can assess the condition of the vegetation canopy in agroforestry systems. LAI in this research was obtained from Hemispherical Photographs analysis using the threshold method in HemiView Canopy Analysis Software. Our research results indicate that there are six types of agroforestry in Cidanau Watershed i.e. Sengon Agroforestry, Clove Agroforestry, Melinjo Agroforestry, Chocolate Agroforestry, Coffee Agroforestry, and Complex Agroforestry. Several factors potentially contribute to variations in the value of LAI in different types of agroforestry. The simple assumptions about differences ranges of LAI values on six types of agroforestry is closely related to leaf area and plant population density.