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为探讨毛乌素沙地固沙树种选择和植被水分管理,2009和2010年5—9月在宁夏回族自治区盐池县利用热包裹式树干液流仪测定沙木蓼(Atraphaxis bracteata)茎干液流,并同步观测环境影响因子。研究表明:(1)沙木蓼茎干液流日变化呈显著规律性,液流速率呈多峰曲线,且昼夜变化明显。(2)沙木蓼生长季液流变化具有节律性。5—6月植物处于生长初期,液流量较小;7—8月雨季到来,植物生长旺盛,液流速率也达到生长季的最大值;9月植物生理过程减慢,沙木蓼液流量逐减降低。(3)采用偏相关分析法分析各环境因子对于沙木蓼茎干液流的影响,结果表明,太阳辐射是影响沙木蓼茎干液流的最主要环境因子,其次是大气温度、大气相对湿度和风速。
In order to explore the selection of sand fixation species and vegetation water management in Mu Us sandy land, Stem Sap Flow of Atraphaxis bracteata was measured by hot-wrap trunk flow meter in Yanchi County, Ningxia Hui Autonomous Region from 2009 to September 2009, Observation of environmental impact factors. The results showed that: (1) The diurnal variation of stem sap flow in P. sativa showed a regular pattern with multi-peak flow rate and obvious diurnal variation. (2) The flow of Polygonum viviparum in the growing season is rhythmic. From May to June, the plant was in the early stage of growth, and the liquid flow rate was small. During the rainy season from July to August, the plants grew vigorously and the flow rate reached the maximum of the growing season. The physiological process of plants slowed down in September. Reduce the reduction. (3) The partial correlation analysis was used to analyze the effects of environmental factors on the stem-flow of P. tuberosum. The results showed that solar radiation was the most important environmental factor affecting the stem-flow of P. tuberosum, followed by the atmospheric temperature and atmospheric relative Humidity and wind speed.