[1]仇宽彪,成军锋.陕西省植被水分利用效率及与气候因素的关系[J].水土保持研究,2015,22(06):256-260.
　QIU Kuanbiao,CHENG Junfeng.Vegetation Water Use Efficiency and Its Relationship with Climate in Shaanxi Province[J].Research of Soil and Water Conservation,2015,22(06):256-260.
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陕西省植被水分利用效率及与气候因素的关系

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 22 期数: 2015年06期 页码: 256-260 栏目: 出版日期: 2015-12-28
Title:
Vegetation Water Use Efficiency and Its Relationship with Climate in Shaanxi Province
作者:
仇宽彪1, 成军锋2
1. 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;
2. 陕西千渭之会国家湿地公园管理处, 陕西 宝鸡 721000
Author(s):
QIU Kuanbiao1, CHENG Junfeng2
1. Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
2. Shaanxi Qianweizhihui National Wetland Park Management Office, Baoji, Shaanxi 721000, China
关键词:
生态; 水分利用效率; 植被类型; 陕西
Keywords:
ecology; water use efficiency; vegetation type;  Shaanxi
分类号:
Q948
摘要:
水分利用效率是反映生态系统碳水循环的重要变量。利用MODIS的总初级生产力以及蒸散发数据产品，结合气象数据，对2002—2012年陕西省水分利用效率进行研究。结果发现，陕西省中部平原区年均WUE较高，北部年均WUE较低；在各植被类型中，耕地的年均WUE最高，达1.59 g/（m2·mm），而灌草地年均WUE则较低。在不同年降水量及年均温区域，WUE与气候因子的关系有所差别：在年降水量低于627 mm的地区，WUE随着降水量增加而增加；在年均温低于11℃的地区，WUE随着年均温的增加而增加。2002—2012年陕西省各植被类型WUE呈增加趋势，其中林地WUE增加趋势不显著。不同的植被类型，其WUE与气候因子关系也不同，其中降水量对WUE产生显著影响的地区主要集中在耕地和草地，而温度对WUE产生显著影响的地区主要集中在林地。
Abstract:
Water use efficiency (WUE) is one of the most important variables linking the carbon with hydrological cycle. In this paper we used the MODIS data products including the MODIS-GPP (MOD17A3), MODIS-ET (MOD16A3) and the land cover (MOD12) to analyze the tempo-spatial characteristics of WUE in Shaanxi Province. Results showed that the annual average WUE was the highest in the middle plain, while the lowest in the northern plateau. WUE in crop land was the highest among various vegetation types (1.59 g/(m2·mm), while WUE in shrub and grassland was the lowest. The relationship between WUE and climate depended on the regions. The positive relationship between WUE and precipitation was found in the regions with precipitation less than 627 mm, the similar relationship of WUE with temperature was found in the regions with annual average temperature less than 11℃. During the period from 2002 to 2012, WUE showed an increasing trend, regardless of insignificant increasing for forest (p > 0.05). The regions with significant relationship between WUE and precipitation were mainly dominated by cropland and grassland, while the areas with insignificant relationship between WUE and temperature were dominated by forest.

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备注/Memo

收稿日期:2015-01-16;改回日期:2015-01-26。
基金项目:国家林业公益性行业专项“森林经营对生态系统碳水耦合变化的影响机理研究”（201204102）；北京市教育委员会科学研究与研究生培养共建项目
作者简介:仇宽彪(1986-),男,江苏镇江人,在读博士生,水土保持与荒漠化防治专业。E-mail:qiukuanbiao@126.com

更新日期/Last Update: 1900-01-01