随着对物候知识的不断丰富及物候学的逐步发展 ,认识到应考察物候现象综合划分季节 ,归纳起来其理由为 :物候现象正好反映的是过去一段时间里气候条件的积累对生物的综合影响 ;所划分的物候季 ,不仅能反映农业季节的特点 ,而且也能说明每个季节应该做什么 ,不应该做什么 ,有什? With the continuous enrichment of phenological knowledge and the gradual development of the phenology, it is recognized that the comprehensive classification of phenological phenomena should be investigated. The reasons for this are summarized as follows: The phenomenon of phenology exactly reflects the comprehensive effect of the accumulation of climatic conditions on the living organisms in the past period ; The division of the phenology season, not only can reflect the characteristics of the agricultural season, but also shows what should be done in each season, what should not be done, what?