地理科学

地理科学 ›› 2014, Vol. 34 ›› Issue (7): 876-881.doi: 10.13249/j.cnki.sgs.2014.07.876

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黑河下游绿洲植被优势种生物量空间分布及蒸腾耗水估算

张华1,2(), 张兰1, 赵传燕2, 彭守璋2, 郑祥霖2   

  1. 1.西北师范大学地理与环境科学学院, 甘肃 兰州 730070
    2. 兰州大学草地农业系统国家重点实验室, 甘肃 兰州 730000
  • 收稿日期:2013-05-16 修回日期:2013-07-10 出版日期:2014-07-10 发布日期:2014-07-10
  • 作者简介:

    作者简介：董玉祥(1964-),男,河南西平人,博士,教授,主要从事海岸风沙地貌和土地资源开发利用与保护方面的教学与研究。E-mail:eesdyx@mail.sysu.edu.cn

  • 基金资助:
    国家自然科学基金项目(91025015)、甘肃省青年科技基金计划(1107RJYA063)、西北师大青年教师科研能力提升计划骨干项目(NWNU-LKQN-11-12)资助

Biomass-based Transpiration Water Consumption of Dominant Species of Vegetation Estimation in the Oasis of Lower Reaches of Heihe River

Hua ZHANG1,2(), Lan ZHANG1, Chuan-yan ZHAO2, Shou-zhang PENG2, Xiang-lin ZHENG2   

  1. 1.College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China
    2. State Key Laboratory of Pastoral Agricultural Ecosystem, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
  • Received:2013-05-16 Revised:2013-07-10 Online:2014-07-10 Published:2014-07-10

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2

摘要：

基于典型样点试验,建立了研究区植被优势种柽柳、胡杨与苦豆子地上生物量与其生态参数关系模型;利用高分辨率遥感影像Geoeye-1对植被优势种进行分类得到生态参数,实现了其地上部分生物量空间分布估算;最后利用生物量与蒸腾系数关系,估算植被优势种蒸腾耗水。结果显示：植被优势种总生物量为2.53×106t,河流距离对生物量影响显著。根据试验测得的植被优势种蒸腾系数估算出总蒸腾耗水量为10.89×108t,柽柳、胡杨与苦豆子所占比例分别为12.94%,82.93%与4.13%。

关键词: 生物量, 植被优势种, 蒸腾耗水, Geoeye-1

Abstract:

The research object of this study are the Tamarix ramosissima, Populus euphratica and Sophora which are the dominant species vegetation in lower reaches of Heihe River. Guided by the theories of Ecology Hydrology, Geobotany, Statistics theories and other disciplines, field investigation combined with remote sensing and spatial analysis methods were applied to study biomass and transpiration water consumption of dominant species of vegetation in study area. Firstly, biological characteristics of typical samples survey and biomass observation of dominant species of vegetation was made. The relational model of aboveground biomass and the ecological parameters (canopy area or coverage area) of dominant species of vegetation were constructed. Then, ecological parameters of dominant species of vegetation were obtained from high resolution satellite imagery Geoeye-1 which were classified by decision tree method to realize the spatial distribution estimation of aboveground biomass of dominant species of vegetation. Finally, the transpiration water consumption of dominant species of vegetation was estimated by the relationship between biomass and transpiration coefficient. According to the studying results, the spatial distribution characteristics of aboveground biomass and transpiration water consumption of 0-2 km, 2-5 km, 5-10 km and 10-15 km river buffer zone were analyzed. The spatial distribution pattern of transpiration water consumption was revealed. The following results were gotten. According to the classification result, the total canopy area of Tamarix ramosissima and Populus euphratica are 2.44×102 km2 and 3.61×10 km2 respectively. And the coverage area of Sophora alopecuroides is 4.28×102 km2. The total biomass of dominant species of vegetation was 2.53×106 t. The distance to river on the biomass of dominant species of vegetation is significant. According to the experimental results of the transpiration coefficient of dominant species of vegetation. The total transpiration water consumption of dominant species of vegetation is 10.89×108 t. The propotion of Tamarix ramosissima, Populus euphratica and Sophora alopecuroides are 12.94%, 82.93% and 4.13% respectively.

Key words: transpiration water consumption, biomass, vegetation dominant species, Geoeye-1

中图分类号: 

  • Q948