摘要
采用农业界限温度稳定通过的初、终日期及其间持续天数为指标,分析研究了湖南农时早晚和农事季节长短的气候特征.对农时和农事季节作定量的描述是农业深度开发的需要,也是客观预报农时和农事季节的基础.
The author of the paper makes an analysis of the climatic factors for earlier orlater agriculture arrangement and the time length for agricultural tasks in Hunan province ac-cording to the data of the starting finishing and the continuing days when the agriculturalthreshold temperatures can be steadily remained,mainly the analysis of their≥5℃,≥10℃,≥15℃ and≥20℃ average value,range and C.V.on the basis of Huaan conditions.Suchquantative analysis is both the necessity of deeper farming exploration and the basis of theobjective forecast of the most favourable agricultural days and agricultural tasks.
关键词
粮食作物
农时
农事季节
气候
food crops
economic crops
seasonal variations
cropping
Huaan/threshold temperature
agricultural days
agricultural seasons
