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| 绿洲―荒漠交错带土壤水分变化特征初步研究 | |
| 引用本文： | 贾宝全,慈龙骏,蔡体久,高志海,丁峰.绿洲―荒漠交错带土壤水分变化特征初步研究[J].植物生态学报,2002,26(2):203-208. |
| 作者姓名： | 贾宝全 慈龙骏 蔡体久 高志海 丁峰 |
| 作者单位： | 1. 中国林业科学院林业研究所,北京,100091 2. 北京林业大学水土保持学院,北京,100083 3. 甘肃省治沙研究所,武威,733000 |
| 基金项目： | 国家自然科学基金项目 ( 4 0 0 710 04,39990 490 ) |
| 摘 要： | 以甘肃省的民勤绿洲为例，选择土壤水分最为亏缺的7月，对白刺(Nitraria tangutorum)沙包不同迎风面，以及绿洲和荒漠交错地带的土壤水分进行了取样分析。结果表明，对于白刺沙包而言，其上层和深层土壤水分是迎风坡大于背风坡，中间层次（40～80 cm）则刚好相反。在绿洲与荒漠的交错带上，灌丛沙包与沙丘间低地水分变化有很大的不同，总体而言，丘间地水分含量大于灌丛沙包，但在距离绿洲406 m处，二者均出现一个土壤水分的最低值。在丘间地表层，水分变化是距离绿洲愈近，土壤含水量愈高；而深层土壤水分的变化趋 |
| 关 键 词： | 交错带 绿洲与荒漠 土壤水分 年内干旱期 |
| 修稿时间： | 2001年7月9日 |
PRELIMINARY RESEARCH ON CHANGING SOIL WATER CHARACTERS AT ECOTONE BETWEEN OASIS AND DESERT |
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| JIA Bao-Quan,CI Long-Jun,Cai Ti-Jiu,Gao Zhi-Hai and Ding Feng.PRELIMINARY RESEARCH ON CHANGING SOIL WATER CHARACTERS AT ECOTONE BETWEEN OASIS AND DESERT[J].Acta Phytoecologica Sinica,2002,26(2):203-208. | |
| Authors: | JIA Bao-Quan CI Long-Jun Cai Ti-Jiu Gao Zhi-Hai and Ding Feng |
| Affiliation: | JIA Bao-Quan 1 CI Long-Jun 1 Cai Ti-Jiu 2 Gao Zhi-Hai 3 and Ding Feng 3 |
| Abstract: | The soil water content of shrub sand dune of Nitraria tangutorum and takyr among sand dunes between oasis and desert towards various wind directions near Minqin Oasis of Gansu Province was sampled and analyzed in July when the soil water is most deficient. The results indicate that to the Nitraria tangutorum shrub in sand dune, soil water content in the surface layer and the deep layer towards windward is more than that on the leeward; the situation is opposite in the middle layer (40-80 cm). In the surface layer of sand dunes, the soil water content is higher nearer to the oasis, but the trend of soil water content is opposite in the deep layer. There is a great difference of soil water condition between the shrub sand dunes and the takyr soil. In general, the water content in takyr soil is more than that in shrub sand dunes, however, there exist minimal water content in these two areas at a distance of 406 m from the oasis along the gradient from oasis to shift sand dune. In the surface layer of takyr soil, the closer to the oasis, the higher content of soil water, but the varying trend of water content in deep layer is opposite. On areas of shrub sand dunes, soil water content is only 1.5%, a level insufficient for plant growth. Along the gradient zone of ecotone between oasis and desert, 3 zones can be divided clearly by the change of soil water content. Generally, the nearer to the oasis, the higher the soil water content; and with the extending of distance, the soil water content both in the deep layer and among each layers are gradually increased. There is a 20 cm soil layer with high water content in the takyr soil, which is situated under the shrub sand dune. The high soil water content enables the shrub plant to survive a very arid period of every year. |
| Keywords: | Ecotone Oasis Desert Soil water Annual arid period |
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