关键词: 茶园, 景观指数, 斑块, 尺度效应, 名山区

Abstract: 【Objective】 Studying the granularity effect of tea garden landscape indexes in different time series at the county scale and analyzing the appropriate granularity range of the tea garden landscape pattern at the county scale are of great significance to reveal the change and driving mechanism of the tea garden landscape pattern. 【Method】 Based on the survey data of land use status in Mingshan District from 2002 to 2018, the granularity effect of landscape pattern index within 10-300 m is analyzed from the patch type level, determine the appropriate particle size range, combined with the landscape area loss model to determine the best particle size of the tea garden landscape evolution in Mingshan District.【Result】 According to the different responsiveness of each index to granularity changes, it can be divided into three categories: high sensitivity, medium sensitivity and low sensitivity; according to the granularity effect curve, the above-mentioned landscape index can be roughly divided into three types: with the increase of granularity, the landscape index includes three types: monotonous decreasing, monotonous increasing and complex changes; the shape of the tea garden landscape tends to be regular with the increase of the grain size, the spatial fragmentation and connection degree decrease, and the distribution tends to be scattered, the spatial connectivity and agglomeration have increased as time goes by. 【Conclusion】 According to the research results, the granularity effect of different landscape indexes is different, considering the stability of the landscape structure and the accuracy of information loss, it is determined that the suitable analysis granularity range of Mingshan tea garden landscape is 60-110 m, and the optimal spatial granularity is 60 m.

Key words: tea garden, landscape index, patch, granularity effect, Mingshan District