关键词: 半番鸭, 半番鸭, 肌肉, 营养成分, 品质评价

Abstract: In order to find the spatiotemporal distribution change characteristics of major disastrous weather in Tangshan City and provide a theoretical basis for disasters prevention, the variation of spatiotemporal distribution of major disastrous weather in this city was analyzed by using the data of disastrous days in Tangshan Region from 2004 to 2013. The results showed that there were 5 types of major disastrous weather in Tangshan Region: fogs, thunderstorms, strong winds, heavy rains and haze. The temporal and spatial distribution of strong winds and fogs had a good inverse correlation. The fog days showed a relatively declining trend, with the high-occurrence center moving toward south, frequently occurring in autumn and winter seasons. The strong wind days appeared a growing trend in recent years, with high-occurrence center moving toward north. Strong convective winds often occurred in spring and summer, with the high winds occurrence areas mainly concentrated in the northern mountains and southern coastal areas. The temporal variation of thunderstorms and heavy rains had a very close positive correlation, with relatively stable occurrence days, mostly occurring between June and August. Thunderstorms often occurred in the northern mountainous area, with maximum occurrence frequency in Zunhua. There were about 1-3 rainstorm days per year according to the report of observation stations, with no significant regional differences. Haze days were increasing, mainly occurred in the middle and west areas in Tangshan Region. Haze was gradually becoming another type of disastrous weather affecting Tangshan Region, with very high occurrence frequency.