4种地被竹的蒸腾特性及蒸发速率的比较

Comparison of the transpiration parameters and evaporation rates of four dwarf bamboos with each other

以4种地被竹(铺地竹(Arundinaria argenteostriata)、菲白竹(Arundinaria fortune)、鹅毛竹(Shibataea chinensis)、黄条金刚竹(Sasaella masamuneana f.aureostriata))为材料,研究了它们的蒸腾特性。结果表明,各竹种4月份、8月份蒸腾日变化均为"双峰型"曲线,中间出现短暂的"午休"现象,但各竹种蒸腾速率高峰值出现的时间不同,在11月份则为"单峰型"曲线。其中8月份各竹种的蒸腾速率要大于其余两个月份。各竹种竹秆、叶片蒸发速率与温度、光照呈正相关,且相关性水平达到极显著,与湿度呈负相关,相关性达显著水平。

The dynamic variation of transpiration and evaporation rates of 4 dwarf bamboos（Arundinaria argenteostriata,Arundinaria fortune,Shibataea chinensis,Sasaella masamuneana f.aureostriata） were measured.The results showed that the diurnal variation of transpiration rate was a double peak curve in April and August,stoma partly closed was the chief reason,however the peak time of transpiration rate of different bamboo species reach the was different.A single peak curve appeared in November and the transpiration rate of August was the highest among the tested 3 months.The correlation analysis indicated that the evaporation rate of culm and leaves significant positively correlated with temperature and illumination,and significant negatively correlated with humidity.