Abstract: Based on GIS technology, and by using the meteorological data from 289 meteorological stations as well as the historical overwintering data of brown planthopper (BPH) in southern China in 1951-2010, this paper chose the January isotherm of 10 ℃ as the optimal index to identify the northern distribution boundary of BPH overwintering in China. The optimal index was selected from the indices in previous researches by the verification of the actual overwintering data of BPH in typical years, and then, the interdecadal variation and inter30year variation of the northern distribution boundary in the past 60 years were analyzed. The results show that under the background of climate warming, due to the increase of the frequency of warm winter years, the average northern distribution boundary of BPH overwintering in southern China moved northward. Compared with that in cool winter years, the northern boundary in warm winter years moved northward by about 2-3 degrees in latitude. The average distribution boundary in the 1980s moved northward most obviously in decades, and that in 1981-2010 moved northward significantly, as compared with that in 1951-1980. The significant north-moving occurred in the central part of Yunnan Province and the southern part of Fujian Province, and the maximum distance of the north-moving in Yunnan Province in the past 60 years was about 90 km.

Key words: vermicomposting, nutrient content, 3DEEM, dissolved organic matter, fluorescence regional integration (FRI).