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| 乌兰布和沙漠5种灌木的水分利用策略 | |
| 引用本文： | 朱雅娟,贾志清,卢琦,郝玉光,张景波,李磊,綦艳林.乌兰布和沙漠5种灌木的水分利用策略[J].林业科学,2010,46(4). |
| 作者姓名： | 朱雅娟 贾志清 卢琦 郝玉光 张景波 李磊 綦艳林 |
| 作者单位： | 1. 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京,100091;中国防治荒漠化研究与发展中心,北京,100091 2. 中国林业科学研究院沙漠林业实验中心,磴口,015200 3. 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京,100091 |
| 基金项目： | 国家“十一五”科技支撑计划项目“防沙治沙植物材料筛选与扩繁技术研究”(2006BAD26B0101);;中国博士后科学基金资助项目“不同功能型荒漠植物的水分利用策略研究”(20070420428) |
| 摘 要： | 利用稳定性同位素技术测定乌兰布和沙漠黑沙蒿、沙冬青、白刺、柠条锦鸡儿和梭梭5种灌木枝条木质部和土壤各层水分的δD值,分析它们在不同季节对不同深度土壤水分的选择性利用;并通过测定灌木叶片(同化枝)的δ13C值,分析4种C3植物的水分利用效率。结果表明:白刺在夏初和秋末主要利用土壤浅层30～60cm的水分,而其他4种灌木则随着季节的变化选择性利用不同深度的土壤水分;白刺在夏初的水分利用效率显著高于秋末(P0.05),黑沙蒿、沙冬青和柠条锦鸡儿的水分利用效率则比较稳定;沙冬青、白刺和柠条锦鸡儿的水分利用效率均高于黑沙蒿。 |
| 关 键 词： | 土壤水分的选择性利用 水分利用效率 稳定同位素 乌兰布和沙漠 灌木 |
Water Use Strategy of Five Shrubs in Ulanbuh Desert |
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| Zhu Yajuan,Jia Zhiqing,Lu Qi,Hao Yuguang,Zhang Jingbo,Li Lei,Qi Yanlin.Water Use Strategy of Five Shrubs in Ulanbuh Desert[J].Scientia Silvae Sinicae,2010,46(4). | |
| Authors: | Zhu Yajuan Jia Zhiqing Lu Qi Hao Yuguang Zhang Jingbo Li Lei Qi Yanlin |
| Institution: | 1. Key Laboratory of Tree Breeding and Cultivation/a>;State Forestry Administration Research Institute of Forestry/a>;CAF Beijing 100091/a>;2. National R&D Center on Combating Desertification Beijing 100091/a>;3. Experimental Center of Desert Forestry/a>;CAF Dengkou 015200 |
| Abstract: | In Ulanbuh desert, Artemisia ordosica, Ammopiptanthus mongolicus, Nitraria tangutorum, Caragana korshinskii and Haloxylon ammodendron are five dominant shrubs.In October 2007 (late autumn) and June (early summer) 2008, a stable isotope technique was used to measure the δD value of water in rain, well, irrigation ditch, branch and different soil horizons of these five shrubs, and then the main water source in the plants in different seasons was analyzed.Also, the δ13C value of their leaves (or assimilating shoot) was measured and the water use efficiency of four C3 plants was analyzed.The results indicated N.tangutorum used the water in 30-60 cm soil in early summer and late autumn whereas other four shrubs extracted water from different soil horizons in two different seasons.The long term water use efficiency of N.tangutorum was significantly higher in early summer than in late autumn (P < 0.05).Water use efficiency of A.ordosica, A.mongolicus and C.korshinskii was relatively stable in the two different seasons.Water use efficiency of A.mongolicus, N.tangutorum and C.korshinskii was higher than A.ordosica. |
| Keywords: | selective use of soil water water use efficiency stable isotope Ulanbuh desert shrub |
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