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探讨了1979-2010年间呼和浩特地区山桃、紫丁香物候期的变化规律及物候期对气候因子的响应.结果显示:(1)呼和浩特市近30年的气温呈现了升高的趋势,而降水和日照时数呈现了下降的趋势;山桃(Prunus persica)和紫丁香(Syringa oblate)的春季物候期呈现提前趋势.两种植物在秋季的落叶末期呈现推迟趋势.(2)山桃和紫丁香的叶期随时间呈现延长的趋势.山桃的叶期在2000年后其平均值为208.38天,比多年的平均值延长了10.28天;紫丁香的叶期在2000年后平均为200.75天,比30年的平均延长了1.3天;而花期随时间没有明显延长的特征.(3)春季物候期与气温特别是当年3、4月的月平均气温呈现极显著相关性.当春季的3、4月份的平均温度每提高1℃,该地区的山桃的开始展叶期、开花始期、开花末期将提前约2.72天、2.58天和2.45天;紫丁香的开始展叶期、开花始期、开花末期将提前约2.81天、3.26天和0.28天.
The changing regularities of phenophase and the response of phenophase to climatic factors during the period from 1979 to 2010 were investigated.The results showed that: (1) The temperature of the past 30 years in Hohhot showed an upward trend, while precipitation and sunshine The number of hours showed a downward trend; the spring phenology of Prunus persica and Syringa oblate presented an early trend, and the two plants showed a late trend of deciduous in autumn. (2) The leaf stage With the trend of the extension of the trend showed.The peach leaf period after 2000, the average was 208.38 days, longer than the average of 10.28 days; lilac leaves in 2000 after an average of 200.75 days, more than 30 years The average period of 1.3 days was prolonged, but the characteristics of the flowering period were not significantly prolonged with time. (3) The phenophase of spring was significantly correlated with the temperature, especially the monthly mean temperature of March and April of that year. When the average of March and April in spring For each 1 ℃ increase in temperature, the beginning of flowering stage, flowering stage and flowering stage will be about 2.72 days, 2.58 days and 2.45 days in advance. The beginning of flowering stage and flowering stage of lilac will be about 2.81 ahead of the flowering stage Day, 3.2 6 days and 0.28 days.