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应用生态学报 ›› 2003, Vol. ›› Issue (6): 858-862.

• 研究论文 • 上一篇    下一篇

黄土半干旱区刺槐和侧柏林地土壤水分有效性及生产力分级研究

张光灿1, 刘霞1, 贺康宁2   

  1. 1. 山东农业大学林学院, 泰安 271018;
    2. 北京林业大学资源与环境学院, 北京 100083
  • 收稿日期:2001-09-24 修回日期:2002-03-25 出版日期:2003-06-15
  • 通讯作者: 刘霞
  • 基金资助:
    国家自然科学基金项目(39970622);教育部高等院校青年骨干教师科研专项基金资助项目

Grading of Robinia pseudoacacia and Platycladus orientalis woodland soil's water availability and productivity in semi-arid region of Loess Plateau

ZHANG Guangcan1, LIU Xia1, HE Kangning2   

  1. 1. Shandong Agricultural University, Taian 271018, China;
    2. Beijing Forestry University, Beijing 100083, China
  • Received:2001-09-24 Revised:2002-03-25 Online:2003-06-15

摘要: 采用LI6200型植物光合测定系统和LI1600型稳态气孔计,对黄土半干旱区刺槐、侧柏的净光合速率、羧化效率、蒸腾速率、水分利用效率、气孔导度、气孔阻力、胞间CO2浓度和气孔限制值与土壤含水量的关系进行研究;并对林地土壤水分有效性及生产力进行分级与评价.结果表明,刺槐与侧柏林地土壤含水量分别在4.5%和4.0%以下为“无效水”;土壤含水量在4.5%~10.0%和4.0%~8.5%阈值内属于“低产低效水”;在10.0%~13.5%和8.5%~11.0%阈值内为“中产高效水”;在13.5%~17.0%和11.0%~16.0%阈值内属于“高产中效水”;在17.0%~19.0%和16.0%~19.0%阈值内为“中产低效水”;土壤含水量在19.0%以上也属于“低产低效水”.

Abstract: With Li 6200 photosynthesis determination system and Li-1600 steaty state poro meter, this paper studied the responses of Robinia pseudoacacia L. and Platycladus orientalis L. leaves' net photo synthesis rate (Pn), carboxylation efficiency (CE), transpiration rate (Tr), water use efficiency (WUEL), stomata conductance (Cs), stomata resistance (Rs),intercellular CO2 concentration(Ci) and stomatal limitation (Ls) of Robinia pseudoacacia and Platycladus orientalis leaves to soil water content (SWC) in semi arid region of Loess Plateau,and based on this,the soil water availability and its productivity of test woodland soils were graded and evaluated. The results showed that on Robinia pseudoacacia and Platycladus orientalis woodland, the SWCless than4.5% and 4.0 %,respectively belonged to “non available water”; in the range of 4.5%~10.0% and 4.0 %~8.5%, “low productivity and low efficiency water”; 10.0%~13.5% and 8.5%~11.0%,“middle productivity and high efficiency water”;13.5%~17.0% and 11.0%~16.0%,“high productivity and middle efficiency water”; 17.0%~19.0% and 16.0%~19.0%,“middle productivity and low efficiency water”; and more that 19.0%,“low productivity and low efficiency water”.

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