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西北干旱区地表-地下水系统变化及其植被生态效应 >
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http://hdl.handle.net/2239/900
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| Title: | 干旱荒漠区植物骆驼刺的耗水规律 |
| Authors: | Zhu, Yonghua(朱永华)
Wu, Yanqing(仵彦卿) |
| Keywords: | 骆驼刺(Alhagi sparsifalia woodland)
耗水量(amount of water consumption)
干旱荒漠区(arid desert region) |
| Issue Date: | Aug-2003 |
| Publisher: | 《水土保持通报》2003，23(4)：43-46． |
| Abstract: | [中文摘要]：天然植物的耗水量是其生态需水量的一部分,也是确定其生态需水量的基础。额济纳旗位于黑河的下游,属于干旱荒漠区,全区域只在河流沿岸依靠地下水形成天然绿洲,骆驼刺是天然绿洲上的一种常见多年生天然矮灌木,具有额济纳旗天然植物根系生物量比地上部分生物量大的多且侧根十分发育的共有特点。因此搞清骆驼刺的耗水规律及耗水量将为认识额济纳旗区域内其它天然植物的耗水量及其耗水规律提供科学的基础。同时也将为维持额济纳旗现有天然生态不再恶化提供科学的依据。为此本文利用由土壤含水量及根系有效长度得到的折算因子与可能蒸散量的积成功地确定了骆驼刺实际蒸散量即其耗水量。得出额济纳旗天然矮灌木骆驼刺林地的年耗水量为132.00mm。并得出额济纳旗矮灌木骆驼刺的耗水量主要来源于潜水蒸发量与土壤贮水量。
[英文摘要]：The amount of water consumption of natural plant is a part of its amount of water requirement, and also the basis to determine its amount of water requirement. Ejina County lying in the lower reaches of Heihe River basins, belongs to an exceedingly arid region, and only on the bank of Heihe River, there are banded oases nourished by groundwater supplied by the river water in the upper and middle reaches, the left region all is covered by desert. In Ejina County, the main landscape is natural oasis. Alhagi sparsifalia is a familiar kind of perennial natural undershrub in the natural oasis, it has the common character of natural plants in Ejina County, its underground biomass is more than its overground biomass and its lateral roots is very abundant. So to make clear the rule of water consumption and to determine the ecological amount of water consumption of Alhagi sparsifalia will provide scientific basis for determining that of other natural plants in Ejina County. At the same time, this will provide a scientific basis for maintaining present ecological environment of Ejian County. The ecological amount of water consumption of Alhagi sparsifalia is successfully calculated by potential evapotranspiration multiplying a reduction factor, and the reduction factor is determined by soil moisture volume percentage and roots efficacious length. It is obtained that the annual amount of water consumption in natural Alhagi sparsifalia woods in Ejina County is 132.002mm. mainly coming from the phreatic water evaporation and the soil moisture storage. |
| URI: | http://seekspace.resip.ac.cn/handle/2239/900 |
| Appears in Collections: | 科学论文
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| 干旱荒漠区植物骆驼刺的耗水规律.PDF | | 372Kb | Adobe PDF | View/Open |
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