| 高宏远, 刘霞, 高晓瑜, 屈忠义.不同灌排模式下盐渍化土壤盐分及离子迁移规律及均衡分析[J].水土保持学报,2023,37(2):361~370 |
| 不同灌排模式下盐渍化土壤盐分及离子迁移规律及均衡分析 |
| Analysis of Salinity and Ions Migration Law and Equilibrium in Salinized Soil Under Different Irrigation and Drainage Modes |
| 投稿时间：2022-07-21 |
| DOI：10.13870/j.cnki.stbcxb.2023.02.042 |
| 中文关键词: 不同灌排模式 水盐均衡 水盐运移 盐分积累 地下水埋深 |
| 英文关键词: different irrigation and drainage modes water and salt equilibrium water and salt migration salt accumulation groundwater depth |
| 基金项目:国家自然科学基金项目(51869019) |
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| 摘要点击次数: 43 |
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| 中文摘要: |
| 为探明盐渍化灌区不同灌排模式下土壤盐分及离子迁移及聚集规律,于2021年5—10月在巴彦淖尔市五原县盐碱化耕地改良示范区分别对"滴灌+明沟排水"与"黄灌+暗管排水"模式下农田进行土壤水盐监测与灌排水量监测,分析不同灌排模式下农田土壤盐分迁移分布规律,利用均衡分析探讨土壤盐分和盐分离子积盐及脱盐特征,为灌区的节水规划及盐渍化防治提供科学依据。结果表明:不同灌排模式下农田土壤均处于脱盐状态,黄灌与暗管排水模式下土壤脱盐效果相对较好,脱盐率为37.73%;滴灌与明沟排水条件下农田中出现HCO3-累积,积累量为0.3 t,黄灌与暗管排水模式下农田中出现Ca2+与Mg2+的累积,积累量分别为2.962 4,0.577 4 t。滴灌与明沟排水模式下整个生育期内,0—40 cm土层处于脱盐状态,40—80 cm土层出现盐分积累现象,黄灌与暗管排水模式下整个生育期0—100 cm土层处于脱盐状态。不同灌排模式下地下水埋深变化趋势相同,黄灌与暗管排水模式下地下水埋深较低,滴灌与明沟排水模式下土壤积盐与地下水质整体呈负相关关系,仅土壤中HCO3-与地下水各离子呈正相关关系,土壤中HCO3-与地下水中Mg2+、HCO3-相关性较强,相关系数分别为0.833,0.759。黄灌与暗管排水模式下土壤积盐与地下水质整体相关关系不明显。 |
| 英文摘要: |
| In order to explore the law of soil salinity and ion migration and aggregation under different irrigation and drainage modes in salinized irrigated area,From May to October 2021,soil water and salt monitoring and irrigation and drainage water monitoring were carried out in farmland under the modes of "drip irrigation+open ditch drainage" and "flood irrigation+dark pipe drainage" in the saline-alkali cultivated land improvement demonstration area in Wuyuan County,Bayannaoer City.To analyzed the migration and distribution of soil salt under different irrigation and drainage modes,and to explore the characteristics of soil salt and salt ion accumulation and desalting by equilibrium analysis,so as to provide scientific basis for water-saving planning and salinization prevention and control in irrigated areas.The results showed that the farmland soil was in a state of desalination under different irrigation and drainage modes,and the soil desalting effect was relatively good under "flood irrigation+dark pipe drainage" mode,the desalting rate is 37.73%.HCO3- was in a state of accumulation under "drip irrigation+open ditch drainage" mode,and the accumulation was 0.3 t.The accumulation of Ca2+ and Mg2+ occurred under "flood irrigation+dark pipe drainage" mode,the accumulated amount is 2.962 4 t and 0.577 4 t,respectively.During the whole growth period under "drip irrigation+open ditch drainage" mode,the 0—40 cm soil layer was in a state of desalinization,and the 40—80 cm soil layer appeared salt accumulation.Under "flood irrigation+dark pipe drainage" mode,the 0—100 cm soil layer was in desalinization during the entire growth period.The groundwater depth was the same under different irrigation and drainage modes.The groundwater depth was lower under "flood irrigation+dark pipe drainage" mode.The soil salt accumulation and groundwater quality were negatively correlated under "drip irrigation+open ditch drainage" mode,only HCO3- in soil was positively correlated with each ion of groundwater,and HCO3- in soil was strongly correlated with Mg2+ and HCO3- in groundwater,and the correlation coefficients were 0.833,0.759,respectvely.The overall correlation between soil salinity and groundwater quality was not obvious under "flood irrigation+dark pipe drainage" mode. |
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