采用气候统计学方法,对临江市1961 ～2010年初、终霜日及无霜期气候特征进行分析.结果表明:临江市初霜日明显延后,气候倾向率达2.43 d/10a;终霜日也有明显提前趋势,气候倾向率仅为-2.16d/10a,主要受初霜日延后的影响,临江市无霜期明显增加,气候倾向率为4.4d/10a;临江市初终霜、无霜期年代特征明显；经突变分析,临江市无霜期变化存在明显的转折年；临江市利用无霜期长短调整了作物品种布局,取得显著经济效益.%Using the climatic statistics method,the climatic characteristics of first frost,last frost and frost-free period in Unjiang City from 1961 to 2010 were analzyed. The results showed that the first frost date of Linjiang City delayed obviously with a climatic trend rate of 2.43 d/10a; while the last frost date advanced with a climatic trend rate of only -2.16 d/ 10a. Under the influence of delayed first frost date,the frost-free period increased obviously with a climatic trend rate of 4.4 d/10a; the first frost,last frost and frost-free period of Linjiang City were characterized by obvious decadal features. Through mutation analysis,the frost-free period of Linjiang had obvious turning point. The adjustment of crop cultivars layout according to the length of frost-free period achieved remarkable economic benefits.
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