本文借助电子计算机,利用瓦尔特气候图考查并分析了屯留地区的干旱规律及主要作物的干旱适应性。结果表明,该区年年均有干旱,但年际间、季节间差异较大,春旱在各季发生频率最大,持续时间最长。夏播和春播作物在该区有较好的干旱适应性,秋播作物则较差。本中还提出并应用了干旱面积、干旱频率及干旱比率等指标。 In this paper, by means of computer, the Walter climate chart is used to examine and analyze the drought regulation and drought adaptability of main crops in Tunliu area. The results show that there are drought in every year in this area, but there is a big difference between seasons in spring and autumn. Spring drought has the highest frequency and the longest duration in each season. Summer sowing and spring sowing have better drought adaptability in this area, while autumn sowing is worse. This article also proposed and applied arid area, drought frequency and drought rate and other indicators.