不同胸径胡杨径向生长的合理生态水位研究

doi:10.13249/j.cnki.sgs.2011.02.172

地理科学 ›› 2011, Vol. 31 ›› Issue (2): 172-177.doi: 10.13249/j.cnki.sgs.2011.02.172

不同胸径胡杨径向生长的合理生态水位研究

叶茂^1,3, 徐海量², 龚君君¹, 安红燕²

1. 新疆师范大学地理科学与旅游学院, 新疆乌鲁木齐 830054;
2. 中国科学院新疆生态与地理研究所, 新疆乌鲁木齐 830011;
3. 新疆干旱区湖泊环境与资源实验室, 新疆乌鲁木齐 830054

收稿日期:2010-05-11 修回日期:2010-09-18 出版日期:2011-02-20 发布日期:2011-02-20
基金资助:
国家自然科学基金项目(30600092;40971284)、新疆维吾尔自治区高校科研计划青年教师科研启动基金(XJEDU2008S41)资助。

Rational Ecological Groundwater Level of Populus euphraticawith Different Diameter in Lower Reaches of Tarim River

YE Mao^1,3, XU Hai-liang², GONG Jun-Jun¹, AN Hong-yan²

1. School of Geography Science and Tourism, Xinjiang Normal University, Urumqi, Xinjiang 830054, China;
2. Xinjiang Institute of Ecology and Geography Research, Chinese Academic of Sciences, Urumqi, Xinjiang 830011, China;
3. Key Laboratory of Lake Environment and Resources in Arid Zone, Urumqi, Xinjiang 830054, China

Received:2010-05-11 Revised:2010-09-18 Online:2011-02-20 Published:2011-02-20

摘要/Abstract

摘要： 借助树木年轮水文学的方法,分析不同胸径胡杨在不同地下水埋深条件下其径向生长量的变化特点和规律。研究结果表明:随着地下水埋深的增加,不同胸径胡杨径向生长量均呈现明显降低趋势,其对地下水埋深变化响应的灵敏度降低幅度呈现先增加,后减少的趋势。3个胸径等级的胡杨径向生长灵敏度最大值对应的地下水埋深为分别是3.3、7.4、7.9m。说明,不同生长阶段的胡杨径向生长量变化对地下水埋深变化响应的敏感性存在差异。可以认为这3个地下水埋深是不同胸径等级胡杨径向生长水分胁迫的合理生态水位。

Abstract: Based on the methods of Dendrohydrology, this paper analyzed the sensitivity change and trend in the ring width growth of the Populus euphratica with different truck diameter grades under different groundwater depths in the lower reaches of Tarim River.The results show that, with the increase of groundwater depth, the ring width of the Populus euphratica with different trunk diameter grades also has a deceasing trend.The regression equations of groundwater depth and the ring width of the Populus euphratica with different trunk diameter grades is:y=-0.0135 x³+0.2882 x²-2.011 x+6.1356 (truck diameter of 4-10 cm);y=0.008 x³-0.093 x²-0.264 x+5.276 (trunk diameter of 10-30 cm) and y=0.0556 x³-1.2008 x²+8.1323 x-5.547 (trunk diameter of 30-50 cm).Those relationships are significant (p<0.01).With the increase of groundwater depth, the S_k of the ring width change of the Populus euphratica decreases firstly and then increases.When the S_k with trunk diameters of 4-10 cm, 10-30 cm and 30-50 cm are up to maximum, the responding groundwater depth is 3.3 m, 7.4 m and 7.9 m, respectively.We can draw a conclusion that the three groundwater depths are regarded as rational groundwater with water stress of Populus euphratica with different truck diameter.

中图分类号:

Q142.9

叶茂, 徐海量, 龚君君, 安红燕. 不同胸径胡杨径向生长的合理生态水位研究[J]. 地理科学, 2011, 31(2): 172-177.

YE Mao, XU Hai-liang, GONG Jun-Jun, AN Hong-yan. Rational Ecological Groundwater Level of Populus euphraticawith Different Diameter in Lower Reaches of Tarim River[J]. SCIENTIA GEOGRAPHICA SINICA, 2011, 31(2): 172-177.

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不同胸径胡杨径向生长的合理生态水位研究

Rational Ecological Groundwater Level of Populus euphraticawith Different Diameter in Lower Reaches of Tarim River

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