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生态学杂志 ›› 2003, Vol. ›› Issue (6): 17-20.

• 研究报告 • 上一篇    下一篇

不同施水量处理下樟子松幼苗叶片水分生理生态特性的研究

李雪华, 蒋德明, 骆永明, 李荣平   

  1. 中国科学院沈阳应用生态研究所, 沈阳, 110016
  • 收稿日期:2002-10-30 修回日期:2003-03-10 出版日期:2003-12-10
  • 基金资助:
    中国科学院沈阳应用生态研究所创新资助项目(SCXD0102-02)

Physiological characteristics of Pinus sylvestris var.mongolica seedlings at different irrigation treatments

LI Xuehua, JIANG Deming, LUO Yongming, LI Rongping   

  1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2002-10-30 Revised:2003-03-10 Online:2003-12-10

摘要: 研究了在不同水分处理下樟子松幼苗的若干生理生态过程和抗旱机制.结果表明,樟子松幼苗的净光合速率、蒸腾速率、气孔导度、水分利用效率、叶片温度及其他水分指标均随施水量的不同呈现较规律的变化;409.2和189.2 mm施水量对樟子松幼苗各项指标的影响呈显著差异,而409.2和321.2 mm之间与321.2和189.2 mm之间均无差异;樟子松幼苗抗旱机制以抗脱水为主.

关键词: 绿洲-荒漠过渡带, 植被盖度, 土壤因子, 空间异质性

Abstract: The physiological process and the mechanism of drought-resistance of Pinus sylvestris var.mongolica seedlings were studied at different irrigation levels. The results showed that of photosynthetic rate, transpiration rate, stomatal conductance, water use efficiency, leaf temperature and other water status index varied regularly with the different irrigation levels. Irrigation levels of 409.2 and 189.2mm had obvious effect on the seedlings.The difference of effect on seedlings between 409.2 and 321.2mm or between 321.2 and 189.2mm was not obvious. The mechanism of drought-relief of the seedlings was anti-dehyration.

Key words: Oasis-desert ecotone, Vegetation coverage, Soil factors, Spatial heterogeneity

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