| 宁夏六盘山沙棘液流变化及耗水特性 |
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| 引用本文： | 沈振西,徐丽宏,王彦辉,于澎涛,熊伟,左海军,曹恭祥,王云霓.宁夏六盘山沙棘液流变化及耗水特性[J].中国水土保持科学,2014(3):59-65. |
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| 作者姓名： | 沈振西 徐丽宏 王彦辉 于澎涛 熊伟 左海军 曹恭祥 王云霓 |
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| 作者单位： | 中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点开放性实验室,北京100091 |
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| 基金项目： | 国家林业公益性行业科研专项“西北典型区域基于水分管理的森林植被承载力研究＂（200904056）,“典型森林植被对水资源形成过程的调控研究”（201104005-02）;国家自然科学基金“气候变化背景下黄土高原土地利用影响径流的空间尺度效应＂（41230852）,“景观规划对黄土高原山地森林小流域土壤水时空变异的影响”（40801017）;中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金“多功能林业理论及典型地区案例研究”（CAFYBB2010001-02）;国家林业局六盘山森林定位站和森林生态环境重点开放性实验室资助 |
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| 摘 要： | 基于热平衡法实测宁夏六盘山北坡天然沙棘茎干液流通量的变化,分析沙棘液流生长季内的日内和日际变化特征,并估算沙棘群落的蒸腾量.结果表明：1）沙棘液流日变化曲线在晴天表现出明显的单峰型,在夜间仍有液流运动,夜间液流量占总全天总液流量的12.87％ ～ 19.62％;液流通量主要受太阳总辐射、空气饱和水汽压差、气温和相对湿度等影响.2）6-9月,沙棘蒸腾速率呈明显的降低趋势;6-9月沙棘群落蒸散量为469.4 mm,略高于同期降水量,蒸腾量约占同期蒸散量的35.11％.3）以环境因子为自变量,以液流量为因变量,经过逐步回归,建立了多元线性模型,回归方程显著.
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| 关 键 词： | 沙棘 液流 蒸腾 耗水 六盘山 宁夏 |
Characteristics of sap flow and water use of Hippophae rhamnoides community in Liupan Mountains,Ningxia |
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| Shen Zhenxi,Xu Lihong,Wang Yanhui,Yu Pengtao,Xiong Wei,Zuo Haijun,Cao Gongxiang,WANG Yunni.Characteristics of sap flow and water use of Hippophae rhamnoides community in Liupan Mountains,Ningxia[J].Science of Soil and Water Conservation,2014(3):59-65. |
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| Authors: | Shen Zhenxi Xu Lihong Wang Yanhui Yu Pengtao Xiong Wei Zuo Haijun Cao Gongxiang WANG Yunni |
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| Institution: | ( Institute of Forestry Ecology, Environment and Protection, Chinese Academy of Forestry, the Key Laboratory for Forest Ecological Environment of the State Forestry Administration of China, 100091, Beijing, China) |
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| Abstract: | Based on the observation of the sap flow flux of Hippophae rhamnoides by the stem heat balance method on northern slope of Liupan Mountains,this paper analyzed the daily sap flow characteristics of H.rhamnoides during the growing season,and estimated the transpiration of H.rhamnoides plantations.The curve of daily sap low showed a typical single-peak pattern,and indicated that sap flow continued till night.The ratio of nocturnal sap flow flux to total daily sap flow flux is about 12.87％ to 19.62％.The daily sap flow flux could be affected by total daily solar radiation,mean vapor pressure deficit,mean air temperature and mean relative air humidity.The transpiration velocity of H.rhamnoides showed an obvious declining trend from March to September,with a total transpiration of 469.4 mm,which was a little higher than the simultaneous precipitation,and the ratio of this transpiration to simultaneous total evapotranspiration is 35.11％.The regression equation to relate environmental parameters to total transpiration was established. |
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| Keywords: | Hippophae rhamnoides L ssp sinensis Rousi sap flow transpiration water use Liupan Mountains Ningxia |
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