关键词: UV-B辐射增加, UV-B辐射增加, 水稻, 生长发育, 产量

Abstract: In the certain degree，the national disasters perception affect the government disasters reduction. The disasters perception of village residents is an important part of national disasters perception, which must be considered in the new country reconstruction. Village residents were surveyed by the questionnaire, in 4 natural villages of Qiaozhen town of Baoji district.and analysised the disasters perception of village residents. The result shows that: (1) The main type of disasters that residents worried is the rainstorm and the flood, and they think the similar disaster will occurren possibility. (2)The traditional measures are mainly used to against natural disasters by residents; (3) Mass media is the main quomodo, by which the residents access disasters information. (4) Family members and the neighbors are the first choice for help when disasters occurren, government is the next. The choice probability asking for help after disaster has a minish trend with length increase of social distance ( a alienation degree of social relationship ). (4) The villagers are willing to take prevention measure when disasters occurren.