阿拉善地区不同立地条件下白刺需水量差异

Difference of Water Demand of Nitraria tangutorum under Different Conditions in Alxa Region

为人工种植白刺和持续利用、保护天然白刺植被,确定不同生态类型的生态需水量,建设不同生态环境下区域配置,以保护生态环境,进行了白刺植被群落不同立地条件下需水量的初步研究。结果表明:(1)考虑地径因素,白刺阴坡的蒸腾速率明显大于白刺阳坡的蒸腾速率。(2)白刺沙包阴坡的蒸腾速率大于白刺沙包阳坡。(3)丘间地白刺阴坡和阳坡蒸腾速率相差不大,但白刺阳坡和阴坡蒸腾速率存在明显差异,即阳坡蒸腾速率大于阴坡蒸腾速率。白刺阳面蒸腾速率在上午及午间明显大于白刺阴面蒸腾速率,而在下午,白刺阳面蒸腾速率略小于阴面的蒸腾速率。

In order to plant and continuously use and protect natural Nitraria tangutora,determine the ecological needs of different ecological types of water,so as to protect different ecological environment under the regional configuration to protect the ecological environment.In this study,apreliminary study was conducted on water demand for Nitraria tangutorum under different plant sites.Result shows that:1)Considering the factors of ground diameter,the transpiration rate of Nitraria tangutorumis higher than that of Nitraria tangutorum.2)The transpiration rate of the shady slope is higher than that of the white sand.3)There is no significant difference in the transpiration rate between the two groups,but the transpiration rate of the sunny slope is higher than that of the shady slope.The transpiration rate of Nitraria tangutorumis significantly higher than that of Nitraria tangutorumin the morning and at noon.