期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：4
页码：042042
DOI：10.1088/1755-1315/233/4/042042
出版社：IOP Publishing
摘要：Wetland Plant biomass is a key biophysical parameter required for understanding ecological systems. In this paper, an above-ground biomass map at 1-m resolution for Longhu wetland was created by using GF-2 data and field measurements. Typha angustifolia, Imperata cylindrical, Arundo donax, Typha angustifolia- Phragmites australis and Phragmites australis were collected in the spring of 2018. The model of vegetation index and biomass was established and applied to the study of the distribution characteristics of vegetation biomass in the study area. Additionally, using the measured soil organic matter, available potassium data and GF-2 data, the organic matter content and available potassium content were mapped. The results showed that a significant correlation relationship existed between vegetation index and above-ground biomass, and the power function model based on NDVI(y = 828770x5.489, R2 = 0.5317) was the most suitable one. The above-ground biomass map showed an overall trend that the biomass increasing was relevant to the distance from water surface. The Phragmites australis with the highest biomass was farthest from the water. The distribution of soil organic matter and available potassium was similar to that of plant biomass. The level of available potassium directly affected the level of biomass, and the organic matter content can predict the change of biomass.
