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一、界限温度的概念和意义界限温度系指日平均气温稳定升到(或降到)某值,此值以上(下)反映了植物生长发育(起止)的新阶段或农事活动新的转折。在农业气候资源分析中常采用0°、5°、10°、15°、 20°(摄氏度下同)各等级。也就是在已有气温资料的基础上,确定某界限温度作为指标,便于掌握自然物候特征和植物的生育规律,及时采取栽培措施,使农业生产获得稳产、高产。
First, the concept of limit temperature and the significance Boundary temperature refers to the average daily temperature rise (or down) to a certain value above (below) reflects the new stage of plant growth and development (start and end) or a new turning point in agricultural activities. In the analysis of agricultural climate resources are often used 0 °, 5 °, 10 °, 15 °, 20 ° (the same degrees Celsius) of the various grades. That is, on the basis of the existing temperature data, the determination of a certain limit temperature as an indicator to facilitate the grasping of natural phenological characteristics and plant fertility rules, timely take cultivation measures to make agricultural production stable and high yield.