| Cite this article: | 任文,丁大伟,谢坤,等.豫东农田土壤盐分运移特征长期变化及影响因素分析[J].灌溉排水学报,0,():-. |
| REN Wen,DING Dawei,XIE Kun,et al.豫东农田土壤盐分运移特征长期变化及影响因素分析[J].灌溉排水学报,0,():-. |
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| Migration Law of Topsoil Salinity and Influence Factors in Typical Agricultural Environment of Eastern Henan |
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REN Wen1, DING Dawei1, XIE Kun1, LIU Anneng1, CHEN Jinping1, YONG Beibei1, GUO Chengshi1, ZHANG Zhixin2,3, LI Zhongyang1
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1.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences;2.College of Grassland Agriculture, Northwest A &3.F University
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| Abstract: |
| 【Objective】In order to explore salt-transport characteristics and their relationship with the water environment,【Method】the salt features of soil, shallow groundwater, and flowing surface water near the area around the National Agro-ecological System Observation and Research Station of Shangqiu in Henan province were monitored from 2010 to 2020, besides long-term change rule and internal relationship of regional soil and water salt features were analyzed using descriptive statistics and Piper figure analysis method.【Result】Results showed that topsoil (0~20 cm) salt increasement mainly caused by precipitation enhancing. The maximum conductivity in topsoil (0~20 cm) usually occurred in the period between October and November, which displayed an optimum linear fitting effect with the precipitation in August (Equation: y=0.794 3x+126.65, R2=0.631 3, P<0.05). The content of Ca2+, Mg2+, Na+, HCO3-, SO42-, Cl- and soil conductivity from topsoil, 0~100cm-depth soil and shallow groundwater in 2020 was significantly higher than that in 2015 (P<0.05). Meanwhile, the hydrochemical type of topsoil leachate, shallow groundwater, and flowing surface was highly similar in 2020, which indicated that the soluble salt of topsoil was much related to water bodies.【Conclusion】This study confirmed the conductivity (in October) of topsoil and 0~100cm-depth soil displayed a positive relationship with precipitation and groundwater depth in the typical agricultural ecosystem of eastern Henan, which also verified topsoil was an important source for soluble salt ions in water. |
| Key words: salt migration; soil soluble salt; soil conductivity; topsoil; water environment |
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