水曲柳等树种光合、耗水及萎蔫系数比较研究

The Comparative Study on Photosynthesis,Water Consumption and Drought-resistance of Tree Species

对水曲柳等10个树种净光合速率、蒸腾速率的日变化和季节变化、耗水量以及萎蔫系数进行研究的结果表明,光合速率和蒸腾速率表现出明显的日变化和季节变化,具体的日变化趋势和季节变化规律存在差异,日均净光合速率旱柳>银中杨>紫丁香>白榆>白桦>水曲柳>暴马丁香>黄菠萝>紫椴>胡桃楸;日均蒸腾速率旱柳>白榆>银中杨>黄菠萝>紫丁香>水曲柳>白桦>暴马丁香>紫椴>胡桃楸;单株年耗水量银中杨>旱柳>白桦>紫丁香>白榆>水曲柳>暴马丁香>紫椴>胡桃楸>黄菠萝。萎蔫系数胡桃楸>黄菠萝>旱柳>白桦>紫椴>银中杨>水曲柳>暴马丁香>白榆>紫丁香。

The diurnal and seasonal variation of net photosynthesis rate and transpiration rate, water consumption were studied. The remits showed： There were obvious regularity in the diurnal and seasonal variation of net photosynthesis rate and transpiration rate of 10 species and were significant differencein in species each. The average daily net photosynthesis from May to September decreased as follow sequence： Salix matsudana 〉 Populus alba × Popuhts berolinensis 〉 Syringa oblata 〉 Ulmus pumila 〉 Betula platyphylla 〉 Fraxinus maudshurica 〉 Syringa arnurensis 〉 Phellodendron arnurense 〉 Tilia amurensis 〉 Juglans mandshurica ; Transpiration rate per day as follows： Salix matsudana 〉 Ulmus pumila 〉 Betula platyphylla 〉 Populus alba Populus berolinensis 〉 Phellodendron amurense 〉 Syringa oblata 〉 Fraxinus maudshurica 〉 Syringa amurensis 〉 Tilia amurensis 〉 Juglans mandshurica. Water consumption every year per plant： Populus alba × Popuhts berolinensis 〉 Salix matsudana 〉 Betula platyphylla 〉 Syringa oblata 〉 Ulmas pumila 〉 Fraxinus maudshurica 〉 Syringa amurensis 〉 Tilia amurensis 〉 Juglans mandshurica 〉 Phdlodendron amurense. The wilting coefficient of species from strong to weak were as follows： Juglans mandshuriea 〉 Phellodendron amurense 〉 Salix matsudana 〉 Betula platyphyUa 〉 Tilia amurensis 〉 Populus alba × Populas berolinensis 〉 Fraxinas maudshuriea 〉 Syringa amurensis 〉 Ulmns pumila 〉 Syringa oblata.