【摘要】 内蒙古皇甫川流域位于鄂尔多斯高原的东端,是黄河中游水土流失治理、生态环境建设的重点区域.沙棘作为一种治理水土流失,改善生态环境的重要水土保持灌木树种,在该流域有广泛的人工种植.2002年,在自然条件下,对皇甫川流域海子塔水土保持实验站内的中国沙棘和引进种俄罗斯大果沙棘的蒸腾耗水特征应用LI-1600稳态气孔计进行野外测定.结果表明:植物蒸腾速率大小是植物自身特征和环境因子综合作用的结果,各因子的变化均可影响蒸腾速率的大小;中国沙棘蒸腾速率日变化波动较大,季节变化也大于大果沙棘,说明中国沙棘对环境因子的敏感度大于大果沙棘.更多还原

【Abstract】 Huangfuchuan watershed is located in the east part of the Ordos Plateau,NeiMongol.It is a key region for soil erosion control and ecoenvironment restoration in the middle reach of Yellow River.In 2002,the transpiration characteristics of Hippophae rhamnoides L.ssp sinensis Rousi and Hippophae ranmnoides were measured under natural conditions by using portable LI1600 stable stomatal.The results indicate that the transpiration rate of plants is deeply related to both of the conditions of plants themselves and the environmental factors.The change of diurnal and \{seasonal\} transpiration rate of Hippophae rhamnoides L.ssp sinensis Rousi is higher than that of Hippophae ranmnoides.It is showed that Hippophae rhamnoides L.ssp sinensis Rousi is more sensitive to environmental factors than Hippophae ranmnoides.更多还原