关键词: 盐胁迫, 光合荧光特性, 耐盐性, 根系构型, 平欧杂种榛

Abstract: Anxi County is a representative and successful example of mountain tea economy. Understanding the spatial and temporal expansion of tea planting area in Anxi County is of great significance to the development mode of mountain tea economy in China. Here, we interpreted remote sensing images of Anxi County in 1991, 1998, 1999, 2006, 2007, 2010 and 2015, and analyzed the expansion of tea planting area at different periods. Land use change in 2015 was simulated using CA-Markov model and Logistic regression model. Compared with the interpretation data of 2015, Kappa coefficient of the simulated results was 0.787, indicating that the simulated results were credible. Then, land use change in 2020 was simulated. The results showed that the tea planting area in Anxi County showed gradual rise in three stages, which were from 1991 to 1999, 1999 to 2007 and 2007 to 2015. Overall, tea planting area changed slowly, and the land use dynamic index of tea plantations was 14.88%. Spatially, tea plantation area in Anxi County was expanded from the northeast to the entire county, and would further expand to the southwestern part, with the scattered smallarea tea plantations merging into some largearea plantations. Our results may provide guideline for planning layout of future teaplanting in the county.

Key words: salt tolerance, Corylus heterophylla × C. avellan, root architecture, photosynthetic and fluorescence characteristics, salt stress