欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 1994, Vol. 5 ›› Issue (1): 32-36.

• 研究论文 • 上一篇    下一篇

4种针叶幼树光合速率、蒸腾速率与土壤含水量的关系及其抗旱性研究

郭连生, 田有亮   

  1. 内蒙古林学院, 呼和浩特 010019
  • 收稿日期:1992-10-21 修回日期:1993-04-14 出版日期:1994-01-25 发布日期:1994-01-25
  • 基金资助:

    国家自然科学基金

Relations of four coniferous young trees'photosynthetic and transpiration rates to soil moisture content and their drought resistance

Guo Liansheng, Tian Youliang   

  1. Inner Mongolia Forestry College, Huhehaote 010019
  • Received:1992-10-21 Revised:1993-04-14 Online:1994-01-25 Published:1994-01-25

摘要: 对半干旱区4种针叶幼树的光合速率、蒸腾速率与土壤含水量关系的分析表明,二者均有随土壤含水量下降而减小的趋势,其关系可用回归方程y=A+Be-kx表示。依此式计算出的净光合速率(Y)等于零时的土壤含水量(X)值,各树种间有明显的差别,该值小的树种具有较强的抗旱性。其抗旱性顺序为侧柏>樟子松>油松>白扦。

关键词: 净光合速率, 蒸腾速率, 土壤含水量, 抗旱性

Abstract: Analysis on the relations of four coniferous young trees' photosynthetic and transpiration rates to soil moisture content in semi--arid region shows that these two rates tend to decrease with decreasing soil moisture content, which can be expressed by regression equation y=A+Be-kx.Calculation results show that when net photosynthetic rate(y)equals to zero,the values of soil moisture content(x) are diffferent for each coniferous species.Tree species with smaller x values have a stronger drought resistance,which is in order of Plalycladus orientalis>Pinus sylvestris var.mongolica>p.tabulaeformis>Picea meyeri.

Key words: Net photosynthetic rate, Transpiration rate, Soil moisture content, Drought resistance