Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors

GAO Hao; QIN Shugao; ZHU Linfeng; FAN Dongqing; CHEN Dong; YANG Luming

doi:10.13961/j.cnki.stbctb.2016.02.015

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Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors

- Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors
- Bulletin of Soiland Water Conservation Vol. 36, Issue 2, Pages: 76-81(2016)
- 作者机构：
  
  1. 北京林业大学水土保持学院宁夏盐池毛乌素沙地生态系统国家定位观测研究站,北京,100083
  2. 北京林业大学水土保持与荒漠化防治教育部重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.02.015
  CLC：
- Published：2016
- 稿件说明：
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GAO Hao, QIN Shugao, ZHU Linfeng, et al. Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors[J]. Bulletin of Soiland Water Conservation, 2016, 36(2): 76-81.
DOI：

GAO Hao, QIN Shugao, ZHU Linfeng, et al. Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors[J]. Bulletin of Soiland Water Conservation, 2016, 36(2): 76-81. DOI： 10.13961/j.cnki.stbctb.2016.02.015.

摘要

[目的] 探究油蒿的蒸腾耗水规律及其对环境因子的响应

旨在为固沙植被建设提供科学依据。[方法]利用野外大型称重式蒸渗仪于2014年6-9月底对单株油蒿的蒸腾过程进行连续观测

并同步监测了土壤含水量及相关气象因子。[结果] 油蒿单日蒸腾强度曲线在晴天表现为双峰曲线

而在阴雨天双峰曲线不明显;研究期间

单株油蒿蒸腾耗水量为101.66 mm

日平均蒸腾强度为0.83 mm/d。蒸渗仪内土壤蒸发量106.05 mm

日平均土壤蒸发强度为0.87 mm/d

试验期间蒸散量占降雨量的82.98%。降雨可以维持油蒿正常生长

并对土壤水分进行一定补充;油蒿蒸腾强度与空气相对湿度(p < 0.01)、空气温度(p < 0.01)、太阳净辐射(p < 0.01)和20 cm深度土壤体积含水量(p < 0.05)具有很好的相关性

且相关性依次减小。[结论] 油蒿蒸腾耗水日变化明显

其蒸腾速率受土壤水分状况、气象条件及自身生理特征等因素的影响。

Abstract

[Objective] Water consumption of Artemisia ordosica through transpiration was measured and its responses to environmental factors were researched to provide some hints for construction of sand-fixing vegetations. [Methods] The dynamic transpiration of Artemisia ordosica was continuously measured using a large-scale weighing lysimeter

and the soil moisture content and related meteorological factors were synchronously monitored. [Results] Mean daily transpiration intensity of Artemisia ordosica performed a bimodal curve in sunny days; while in rainy days

the mean daily transpiration intensity performed unimodal curve. Water consumption of Artemisia ordosica was 101.66 mm during the study period

averaged 0.83 mm/d per day. Soil evaporation in the lysimeter was 106.05 mm

about 0.87 mm/d. The evapotranspiration accounted for 82.98% of rainfall in the study period. Transpiration intensity of Artemisia ordosica were significantly correlated with environmental factors of relative air humidity(p < 0.01)

atmospheric temperature(p < 0.01)

net radiation(p < 0.01)

soil water content at 20 cm depth(p < 0.05) in a decreased rank. [Conclusion] Daily transpiration of Artemisia ordosica varied distinctly

and the transpiration rate was affected by soil moisture condition

meteorological factors and its own physical characteristics.

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