| 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、土壤离子含量和水化学特征变化。【结果】（1）不同矿化度处理下，水源入渗在不同深度土壤盐分累积量不同，则盐分在60~80 cm深度处积盐，最高积盐量可达6.1 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SO42-、Cl-、K+和Na+离子含量的变化随矿化度增加显著，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】分析了不同矿化度滴灌梭梭对土壤水盐的分布特征，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： |
| 分类号:S153.5 |
| 基金项目:国家自然科学基金项目（41601579，U1803244）；国家重点研发计划专项（2017YFC0404303）；兵团中青年科技创新领军人才（2018CB023）；兵团优秀青年教师（CZ027204）；石河子大学青年创新人才项目（CXRC201801） |
|
| Soil water and salt transport characteristics of typical desert plant Haloxylon ammodendron under drip irrigation with saline water |
|
liusaihua, yangguang
|
|
Schoolof Water Conservancy and Architectural Engineering, Shihezi University
|
| Abstract: |
| 【Objective】To investigate the effects of saline drip irrigation with different salinity on water and salt transport characteristics of desert plant Haloxylon ammodendron on soil.【Method]】The soil moisture, salinity, soil ion content and hydrochemical characteristics of Haloxylon ammodendron under different salinity irrigation sources were analyzed by using the pit test of Haloxylon ammodendron under saline irrigation and the methods of shukalev and piper trigram. 【Result】(1) The soil salinity of Haloxylon ammodendron under saline water drip irrigation was positively correlated with the salinity of irrigation water. The soil salinity was accumulated at the depth of 60-80 cm, and the maximum salinity was 6.1 g/kg. (2) The content of SO42-、Cl-、K+ and Na+ in Haloxylon ammodendron soil is varied significantly with the increase of mineralization. The soil aqueous cation changes gradually from Ca2+ to Na+, the anion changes gradually from SO42- to Cl-, and the water chemical type changes gradually from SO42--Ca2+ ? Mg2+ to SO42- ? Cl--Na+.【Conclusion】The characteristics of soil water and salt transport in Haloxylon ammodendron with different salinity were analyzed, and the changes of soil ions and the characteristics of hydrochemical evolution under drip irrigation with different saline water were clarified, which had guiding significance for sustainable utilization of local saline water resources and ecological construction. |
| Key words: Saline water; Haloxylon ammodendron; Water and salt migration; Hydrochemical property |
