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本文采用气候学方法计算了甘肃黄土高原林木生长期的蒸散耗水量,与实测资料对照表明,计算值较符合实况.根据乔木生长期的耗水量指标,以及降水量和水土流失的观测资料,对甘肃黄土高原乔木生长期的水分条件进行了较详细地评述。提出了“实际干燥度”和“实际湿润度”的概念,并根据后者确定了甘肃黄土高原各类气候植被区林木的适生程度,以及在各种地形下应当选择的乔,灌木树种。
In this paper, the climatological method was used to calculate the evapotranspiration water consumption during the growing season of Gansu loess plateau, and the measured data show that the calculated values are more in line with the actual situation.According to the indicators of water consumption during the growing season of trees and precipitation and water and soil erosion observation data, The water conditions of arbor growing season in Gansu Loess Plateau are reviewed in detail. The concepts of “actual dryness” and “actual wetness” are put forward. According to the latter, the fitness of trees in all climatic zones on the Loess Plateau of Gansu and the species of trees and shrubs that should be selected under various topography are determined.