福建省干旱的时空分布及其对农业生产的影响

通过对福建省66个县近44年的干旱资料分析,阐述了该省春旱、夏旱和秋冬旱的时空分布特点及其对农业生产的影响。结果表明,福建干旱以夏旱为主,秋冬旱次之;各类干旱以小旱为主,中旱次之,大、特旱则仅占四分之一。春旱在中南部沿海地区高发;夏季小、中旱以中南部沿海地区多发,大、特旱以厦门、莆田、福州地区多发;秋冬旱是南部多于北部地区。对农业生产影响较大的是春旱和夏旱,尤以夏季的大、特旱威胁最大。

Spatiotemporal distribution characteristic of drought in recent 44 years in Fujian Province and its impact on agricultural production

According to the drought data for recent 44 years from 66 weather stations in Fujian Province,the spatio- temporal distribution characteristic and the impacts on agriculture of the drought in spring,summer,autumn and winter were analyzed.The results suggest that(1)Drought in Fujian mainly occurred in summer season,and sel- dom in autumn and winter;The majority of drought in Fujian is light drought,moderate drought takes the second place,while serious droughts and critical droughts only take a quarter respectively.(2)Middle and southern Fu- jian near the coast are frequent-incidence areas of spring drought and of light drought and moderate drought in sum- mer;Xiamen,Putian and Fuzhou are high-incidence areas of serious drought and critical drought;frequency of drought in autumn and winter in south Fujian is higher than that in the northern area.(3)Among all of the drought,the impact of spring drought and summer drought on agriculture are greatest,especially that of serious drought and critical drought in summer.