关键词: 表面活性剂, 吸附, 土壤

Abstract: Based on the ETM⁺ remote sensing images and field investigation data, an inversion model for the tree layer species diversity was established and verified, and used to study the distribution pattern of tree layer species diversity of water conservation forests at different altitudes and aspects in the montane region of eastern Liaoning Province. In the study area, there was a high correlation between the Shannon-Wiener diversity index and the normalized difference vegetation index (NDVI), humidity (TC₃), and green vegetation index (TC₂). The regression model of Shannon-Wiener diversity index and the three vegetation indices was reliable (R²=0.637, P<0.01). Field verification indicated that this inversion model could explain 69.38% of the tree layer species diversity. The tree layer species diversity was mainly within the range of 1.0-2.2, and presented “a high swelling at mid altitude”. The effects of aspect on the distribution of tree layer species diversity mainly exhibited in the greatest probability of high species diversity occurred on northeast slope, which verified the viewpoint that aspect induced the differences in water and heat conditions, and thus, affected species diversity.

Key words: Surfactants, Sorption, Soil