植物生态学报 ›› 2000, Vol. 24 ›› Issue (1): 69-73.

• 论文 • 上一篇    下一篇

鹤山人工马占相思林水分生态研究

曾小平,赵平,彭少麟   

  • 发布日期:2000-01-10
  • 通讯作者: 曾小平

Study on the Water Ecology of Artificial Acacia Mangium Forest in the Heshan Hill Region, Guangdong Province

ZENG Xiao-Ping, ZHAO Ping and PENG Shao-Lin   

  • Published:2000-01-10
  • Contact: ZENG Xiao-Ping

摘要:

通过对马占相思叶片的蒸腾速率、气孔导度及其相应环境因子的测定,探讨鹤山丘陵人工马占相思林的水分生理生态特征。结果表明:蒸腾速率和气孔导度具有明显的日变化,两者的变化趋势相似,在夏季的日变化曲线呈双峰型,冬季呈单峰型;夏季的蒸腾速率最高,在冬季最低,仅占夏季的27.6%;马占相思林的蒸腾耗水量在旱季和雨季有明显的差异,旱季的蒸腾耗水量占雨季的25.5%,年蒸腾量为1625.1mm,占同期降水量的78.3%;马占相思林的蒸腾量接近热带雨林。

关键词: 马占相思, 蒸腾速率, 气孔导度, 水分生态

Abstract:

Transpiration rate (E) and stomatal conductance (gs) in leaf of Acacia mangium were measured in a subtropical low hilly area of Guangdong Province, South China. Results showed that E and gs had a similar daily variation, both exhibiting a bimodal pattern in summer, and single-peak pattern in winter. The highest average E was found in summer, and the lowest in winter: E in winter was just 27.6 % of that in summer. The water consumption through transpiration of the A. mangium forest showed a clear difference between drought and wet seasons. Annual water consumption through transpiration was calculated as 1625. 1mm, which accounted for 78.3% of precipitation during the same period. The result indicated that water consumption through transpiration of A. mangium forest could approach that of a tropical rainforest.

Key words: Acacia mangium, Transpiration rate, Stomatal conductance, Water ecology