摘要
物侯季节节奏是地理环境的一种重要属性,认识它的变化的规律,对于掌握农业生产活动的时宜,具有时间背景的意义。本文以华北地区为例,利用数理统计方法,确定了初春至盛夏期间季节节奏正常与异常的判据,并得到一组定量描述区域物候季节节奏的回归方程。在实践上,这一组方程可以用来进行该区域内许多地点的季节预报。
Phenological seasonal rhythm is one of the important attributes in geographic environment.Understanding its behaviour has practical significances for mastering farming seasons. This paper takes North China region as an example.First,choose the first flowering dates of Ulmus pumila,Prunus armeniaca,Syringa oblata,Robinia, pseudoacacia and Albizzia julibrissin in Beijing,Taian,Xian and other places as the phonological indexes.Second,determine the criteria of the seasonal rhy- thm from early spring to midsummer through statistical analysis.Next,build a group of regression equations to describe quantitatively the characteristics of the regional seasonal rhythm. The research shows that the consistency of physical geographic region finds expression not only in the combination characters of various geographic ele- ments but also in the variations of seasonal rhythm.These criteria and regr- ession equations can be used to judge whetherthe seasonal rhythm is normal, and to forecast the season arrival in the research region.
出处
《地理科学》
CSSCI
CSCD
北大核心
1990年第1期69-76,共8页
Scientia Geographica Sinica
关键词
季节节奏
物候指标
物候判据
Seasonal rhythm
Phenological index
Phenological eriterion
Regional general formula
Seasonal forecast
