| 咸水灌溉对沙漠防护林植物根系分布及风沙土演变的影响 |
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| 引用本文： | 李从娟,唐俊妍,高 培,孙永强,翟志忠.咸水灌溉对沙漠防护林植物根系分布及风沙土演变的影响[J].土壤学报,2015,52(5):1180-1187. |
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| 作者姓名： | 李从娟 唐俊妍 高 培 孙永强 翟志忠 |
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| 作者单位： | 中科院新疆生态与地理研究所,石河子大学农学院林学系,新疆信息工程学校,中国科学院新疆生态与地理研究所 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 以塔克拉玛干沙漠公路沿线防护林植物及土壤为研究对象,综合研究咸水灌溉对植物根系及风沙土演变的作用。结果表明,柽柳的根系较深,达到200 cm,而梭梭和沙拐枣根系为100~150 cm。林地表层土壤出现显著的土壤盐分(8 m S cm-1)和养分聚集现象。但在植物根系分布最多的40~60 cm的土壤层中并没有出现土壤盐渍化现象(1.0 m S cm-1)。防护林地土壤养分含量显著高于流沙地,且土壤的黏粒和粉粒以及土壤团聚体和团聚体稳定性均显著增加。综上所述,地下咸水灌溉并未对植物的正常生长产生盐害或毒害,同时有利于沙漠风沙土的演变。
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| 关 键 词： | 咸水灌溉 根系分布 风沙土演变 塔克拉玛干沙漠 |
| 收稿时间： | 2014/10/30 0:00:00 |
| 修稿时间： | 2015/2/28 0:00:00 |
Effect of irrigation with saline water on plant root distribution and evolution of aeolian sandy soil in shelterbelts along desert highways |
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| li Congjuan,Tang Junyan,Gao Pei,Sun Yongqiang and Zhai Zhizhong.Effect of irrigation with saline water on plant root distribution and evolution of aeolian sandy soil in shelterbelts along desert highways[J].Acta Pedologica Sinica,2015,52(5):1180-1187. |
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| Authors: | li Congjuan Tang Junyan Gao Pei Sun Yongqiang and Zhai Zhizhong |
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| Institution: | Xinjiang Institute of Ecology and Geography, CAS,,Forestry College, College of Agriculture in Shihezi University,Xinjiang Information Engineering School,Xinjiang Institute of Ecology and Geography, CAS |
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| Abstract: | Investigation were carried out of plants and soil in shelterbelts along highways in the Taklimakan to explore effects of irrigation with saline water on plant root system and evolution of aeolian sand soil in the belts. Results show that the roots of Tamarix go much deeper, about 200cm into the soil, while those of Haloxylon and Calligonum about 100~150cm; Soil salts (about 8 mS cm-1) and nutrients accumulate significantly in the topsoil layer (crust and 0-10 cm soil layers) in shelterbelts irrigated with saline water, but in the 40~60 soil layer, where plant roots are densely distributed, soil salinization does not exist (<1.0 mS cm-1) . The soil in the shelterbelt is much higher than in shifting sand soil in content of soil organic C, total N and total P, and moreover, the soil is significantly higher in content of clay, silt and soil aggregates, which are relatively higher in stability than shifting sand soil. To sum up, irrigation with saline groundwater does not bring about any salt hazard or toxicity to plants growing normally in the shelterbelts, and instead it is conducive to evaluation of desert aeolian sand soil. |
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| Keywords: | Saline irrigation Root distribution Aeolian soil evolution Taklimakan Desert |
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