| 临江市无霜期变化规律及其对农业的影响 |
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| 引用本文： | 于文立,杨琦.临江市无霜期变化规律及其对农业的影响[J].安徽农业科学,2012,40(14):8248-8249. |
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| 作者姓名： | 于文立 杨琦 |
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| 作者单位： | 吉林省临江市气象局,吉林临江,134600 |
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| 摘 要： | 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-2.16 d/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4.4 d/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。
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| 关 键 词： | 初终霜日 无霜期 分布特征 线性趋势 |
Change Laws of Frost-free Period and Its Impact on Agriculture in Linjiang |
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| Institution: | YU Wen-li et al(Linjiang Meteorological Bureau,Linjiang,Jilin 134600) |
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| Abstract: | Using the climatic statistics method,the climatic characteristics of first frost,last frost and frost-free period in Linjiang 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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| Keywords: | First and last frost date Frost-free period Distribution features Linear trend |
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