【摘要】 运用1974年以来民勤荒漠区植物物候观测资料和气象观测资料,将22种植物分别按生长类型划分为乔木、灌木和草本植物3种生活型,再按更新芽着生部位将22种植物划分为高位芽植物、地上芽植物和地面芽植物植物3种生活型,分析了按这2种方法划分的不同生活型植物物候响应气候变化的差异。结果表明:1)不论以哪种方法划分的植物生活型,春季物候响应气温变化的敏感程度均大于秋季;2)按生长类型划分的3种生活型植物之间的物候变化差异较按更新芽着生部位划分的3种生活型植物之间的物候变化差异大,主要表现为乔木和灌木的物候差异较大;3)当地植物的生长期长度、乔木的春季物候提前幅度和高位芽植物的春季物候提前幅度大于其他文献报导;4)更新芽着生部位越高,春季物候响应当月和当年气温变暖越敏感,表明在地面以上、乔木高度以内,距地面越高气温对春季物候的影响越显著。更多还原

【Abstract】 Based on the phenological and meteorological data observed in the Minqin desert area since 1974,22 plant species in the area were classified into 3 life forms,i.e.,arbor,shrub,and herb in terms of growth type,and again,divided into phenerophyte,chamaephyte,and hemicryptophyte according to positions where the renewal buds seated.By these two methods,the differences in the phnelogical responses of the 3 life form plants were analyzed.As for the 3 life form plants,whatever either of the two methods adopted,they were more sensitive to temperature change in spring than in autumn,and the differences in their phenological responses were greater when classified according to growth type,with larger differences mainly between arbors and shrub.Both the duration of local growth season and the advancing magnitudes of the phenology of arbor and phaenerophyte in spring were greater than those recorded in other literatures.The higher the renewal buds seated,the more sensitive the responses of the plants to climate warming in current month and in the same year,implying that within the scope of the arbor height above ground,the higher the vertical distance from the ground,the more significant the effect of temperature on the phenology of the plants in spring.更多还原