| 摘要: |
| 【目的】探讨不同矿化度咸水滴灌荒漠植物梭梭对土壤水盐运移特性的影响。【方法】采用测坑进行咸水滴灌梭梭试验，运用舒卡列夫和Piper三线图等方法，分析不同矿化度对梭梭土壤水分、盐分、土壤离子量和水化学特征变化。【结果】①不同矿化度咸水滴灌后，不同深度土壤盐分累积量不同，结果发现在60~80 cm深度处积盐，最高积盐量可达6.2 g/kg；且咸水滴灌梭梭土壤含盐量与灌水矿化度呈正相关关系；②咸水滴灌梭梭后，土壤中SO2- 4、Cl-、K+和Na+离子量的变化随矿化度显著增加，土壤水溶液阳离子由Ca2+逐渐向Na+变化，阴离子由SO2- 4逐渐向Cl-变化，水化学类型由SO2- 4-Ca2+?Mg2+型逐渐向SO2- 4?Cl--Na+型演化。【结论】不同矿化度滴灌梭梭条件下，分析土壤含水率、含盐量的分布特征，明确了不同咸水滴灌对土壤离子变化及水化学演变特性，为当地咸水资源的高效利用及生态建设具有指导意义。 |
| 关键词: 咸水；梭梭；水盐运移；水化学特性 |
| DOI：10.13522/j.cnki.ggps.2019186 |
| 分类号: |
| 基金项目: |
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| Experimental study on water and solute movement in soil grown with desert plant haloxylon ammodendron under drip irrigation using saline water |
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LIU Saihua, YANG Guang, ZHANG Qiuying, HE Xinlin,XUE Lianqing， WANG Zelin, LI Fadong, REN Futian
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1. School of Water Conservancy and Architectural Engineering, Shihezi University/Key Laboratory of Modern Water-saving Irrigation Corps, Shihezi 832000, China; 2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China; 4. Institute of Geography and Resources, Chinese Academy of Sciences, Beijing 100101, China; 5. University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| 【Objective】Saline groundwater in arid and semi-arid regions could be used as an alternative water source to irrigate crops, and understanding its impact on water and solute dynamics in soil is essential to safeguard its use. In this work we present the results of an experimental study on water and solute movement in soil grown with desert plant Haloxylon ammodendron under drip irrigation using saline water.【Method】The experiment was conducted in lysimeters and during the experiment, we measured soil moisture, soil salinity, contents of different ions, and other hydro-chemical propertied of the Haloxylon ammodendron. The data were analyzed using Shukalev method and the piper trigram.【Result】①Soil salt content was positively correlated to the salinity of the irrigating water and accumulated in depth of 60~80 cm with a maxima of 6.1 g/kg. ②The content of SO2- 4, Cl-, K+ and Na+ in soil varied significantly as the salinity of the irrigating water increased. After irrigation, the cations in soil changed gradually from Ca2+ dominant to Na+ dominant, anions from SO2- 4dominant to Cl- dominant, and soil water from SO2- 4-Ca2+·Mg2+ type to SO2- 4·Cl--Na+ type.【Conclusion】The movement and distribution of water and solute in soil under drip irrigation using saline water was experimentally studied in lysimeters and the results provide guidance to saline water irrigation management in arid and semi-arid regions. |
| Key words: saline water; haloxylon ammodendron; water and salt migration; hydro-chemical property |
