干旱区研究

干旱区研究 ›› 2012, Vol. 29 ›› Issue (1): 101-108.

• 植物生态 • 上一篇    下一篇

准噶尔盆地南缘梭梭树干液流规律比较

李妙伶1,3,周宏飞2,3,孙鹏飞1,3   

    1. 石河子大学 水利建筑工程学院，新疆 石河子 832000
    2. 中国科学院 新疆生态与地理研究所，新疆 乌鲁木齐 830011
    3. 新疆阜康荒漠生态系统国家野外科学观测研究站，新疆 阜康 831505
  • 收稿日期:2010-12-12 修回日期:2011-03-31 出版日期:2012-01-15 发布日期:2012-02-27
  • 通讯作者: 周宏飞. E-mail：zhouhf@ms.xjb.ac.cn
  • 作者简介:李妙伶（1986－），女，河南周口人，在读硕士，主要从事水资源开发利用与管理研究. E-mail：1985miaomiao07@163.com，lml_shz@sina.com
  • 基金资助:

    “十一五”国家科技支撑计划项目（2007BAC17B02）；国家重点基础研究发展计划（973）项目(2009CB421301)；中国科学院知识创新工程项目（KZCX2-YW-JS306）资助

Comparative Study on the Stem-sap Flow Flux of Holoxylon ammodendronin Southern Marginal Zone of the Junggar Basin

LI Miao-ling1, 3,ZHOU Hong-fei 2, 3,SUN Peng-fei1,3   

    1. 1．College of Water Resources and Building Engineering, Shihezi University, Shihezi 832000, Xinjiang, China
    2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
    3. National Fukang Station for Desert Ecosystem Field Observation and Research, Fukang 831505, Xinjiang, China
  • Received:2010-12-12 Revised:2011-03-31 Online:2012-01-15 Published:2012-02-27

PDF (PC)

952

赞

被引次数

21

摘要： 采用SF-300热脉冲树干液流仪，分析比较了准噶尔盆地南缘人工种植和原生条件下，梭梭树干液流及其土壤水分的变化，建立了人工种植梭梭树干液流速率与气象因子的最优回归方程。结果表明：人工种植梭梭日累积液流量过程线呈近似 “S”型，与土壤含水率具有极显著的相关性；液流速率日变化多呈双峰型，昼夜变化明显，对气温的时滞约1 h；原生梭梭耗水特征相对稳定，日累积液流量过程线近似直线型，与土壤含水率无相关性，液流速率日变化多呈多峰型，无明显日过程。观测期人工梭梭单位面积液流通量平均为0.240 L/(cm2.d)，是原生梭梭的1.5倍；降雨后人工和原生梭梭液流速率峰值分别比降雨前提前3 h和30 min。

关键词: 梭梭, 树干液流, 速率, 气象因子, 土壤水分, 准噶尔盆地

Abstract: The trunk sap flow and soil moisture content of artificiallyplanted and natural Holoxylon ammodendron growing in the southern marginal zone of the Junggar Basin, Xinjiang, China were measured with the SF-300 heatpulse technique, and the data were analyzed and compared. An optimum regression equation between trunk sap flow velocity of artificially-planted Holoxylon ammodendron and meteorological factors was developed. The results show that the curve of daily cumulative trunk sap flow flux of artificially-planted Holoxylon ammodendron was S-shaped, and the correlation between daily cumulative trunk sap flow flux and soil moisture content was very remarkable; the curves of daily change of trunk sap flow velocity were mostly bimodal, the change of circadian rhythm was obvious, and the time lag to air temperature was for about one hour; water consumption of natural Holoxylon ammodendron was relatively stable, the curve of daily cumulative trunk sap flow flux of natural Holoxylon ammodendron was approximatively beelineshaped, there was no correlation with soil moisture content, and the curves of daily change of trunk sap flow velocity were mostly in a multipeak shape without obvious daily process. The average value of trunk sap flow flux of artificially-planted Holoxylon ammodendron was 0.240 L/(cm2.d) during the observation period, it was 1.5 times of that of natural Holoxylon ammodendron After rainfall, the peak value of sap flow velocity of artificiallyplanted and natural Holoxylon ammodendron was moved up for 3 hours and 30 minutes respectively compared with that before rainfall.

Key words: Holoxylon ammodendron, trunk sap flow velocity, meteorological factor, soil moisture content, Junggar Basin