| 张文聪,周慧,史海滨,李环环,王亚晖,单长河,王凤春.河套灌区重度盐渍化耕地干排盐效果定量分析研究[J].干旱地区农业研究,2025,(2):272~280 |
| 河套灌区重度盐渍化耕地干排盐效果定量分析研究 |
| Quantitative analysis of dry drainage effect on heavily salinized cultivated land in the Hetao Irrigation District |
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| DOI：10.7606/j.issn.1000-7601.2025.02.27 |
| 中文关键词: 盐渍化耕地 干排盐 土地利用类型 河套灌区 |
| 英文关键词:alinized cultivated land dry drainage land use type Hetao Irrigation District |
| 基金项目:河北省教育厅科学研究项目（BJK2024018）；2024年度沧州市科技创新研究课题（CZKX2024487） |
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| 中文摘要: |
| 以河套灌区典型灌排单元为例，明确具有干排盐功能的盐渍化耕地面积，并对其土地利用类型进行了调整。通过建立的耕、荒地水盐均衡模型进行分量计算，量化上述盐渍化耕地的干排控盐作用，同时分析了土地利用类型的变化对干排盐系统的影响。结果表明：通过调整此类耕地的土地利用类型，排盐荒地面积增加1.93 hm2，占比提高0.58%，但从耕地迁移到荒地的水分增加了18.59%，干排盐量增加了18.56%，耕地积盐量减少了55.80%。2019—2020年生育期内，排盐量分别占总引入盐量的41.61%和36.46%，通过干排盐排泄到荒地的盐分分别占总引入盐量的52.39%和53.50%，耕地累积盐分分别占总引入盐量的6.00%和10.04%。综上所述，将实际发挥干排盐作用的盐碱耕地调整为排盐荒地具有切实可行性，目前仍需完善明沟排水系统以确保盐分排出灌区。 |
| 英文摘要: |
| This study used a typical irrigation and drainage unit in the Hetao Irrigation District as a case study to identify the area of saline\|alkali cultivated land with a dry drainage function and to propose adjustments to its land use type. Based on the water and salt balance model and its component calculation, the effect of dry drainage on saline\|alkali cultivated land was quantified, and the influence of land use type change on dry drainage system was analyzed. The results showed that by adjusting the land use type of the saline\|alkali cultivated land, the area of wasteland increased by 1.93 hm2, the proportion increased by 0.58%, but the water migration from cultivated land to wasteland increased by 18.59%. The dry drainage increased by 18.56%, and the salt deposit in cultivated land decreased by 55.80%. During the growth period from 2019 to 2020, the amount of salt discharged from the study area accounted for 41.61% and 36.46% of the total introduced salt, respectively. The salt excreted to the wasteland through dry drainage accounted for 52.39% and 53.5% of the total introduced salt, respectively. The accumulated salt in cultivated land accounted for 6.00% and 10.04% of the total introduced salt, respectively. In conclusion, it is feasible to convert saline\|alkali cultivated land into salt discharge wasteland, effectively serving as dry drainage. However, the open\|ditch drainage system in the Hetao Irrigation District still requires improvement to ensure effective salt discharge. |
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