| 引用本文: | 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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| 摘要: |
| 【目的】探究农田生态系统耕层土壤盐分运移特征及其与水环境关系。【方法】于2010—2020年对河南商丘固定区域内农田生态系统土壤、浅层地下水及流动地表水盐分特征进行观测，采用描述性统计及Piper图分析方法，研究观测区域中土壤及水体盐分特征长期变化规律及内在联系。【结果】降水量增加是引发耕层土壤（0~20 cm）盐分离子升高的重要原因。耕层土壤电导率最大值通常出现在10—11月，其与8月降水量的线性拟合效果最佳（拟合式为y=0.794 3x+126.65，R2为0.6313，P<0.05）。2020年耕层土壤（0~20 cm）、浅层土壤（0~100 cm）及浅层地下水中Ca2+、Mg2+、Na+、HCO3-、SO42-、Cl-及土壤电导率显著高于2015年（P<0.05）。同时，2020年耕层土壤浸出液、浅层地下水及流动地表水水化学类型表现出高度相似性，表明耕层土壤与水体可溶性盐离子存在密切联系。【结论】豫东地区典型农田生态系统降水量、地下水位与10月的耕层及浅层土壤电导率表现为正向关系，且耕层土壤是水体可溶性盐离子的重要来源。 |
| 关键词: 盐分迁移 土壤可溶性盐 土壤电导率 耕层土壤 水环境 |
| DOI： |
| 分类号:S271 |
| 基金项目:中国农科院基本科研业务费专项院级统筹项目(Y2022LM29)；国家农业环境商丘观测实验站(NAES038AE05)；中央级公益性科研院所基本科研业务费专项(FIRI20210401)；河南省科技攻关项目(232102320332) |
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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 |
