| Environmental effects of soil water and salinity regulation under drip irrigation in low-lying severe saline-sodic soil |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2019.01.01 |
| Key Words: low-lying saline-salic soil shallow groundwater area shallow groundwater level electrical conductivity of groundwater [JP4]electrical conductivity of phreatic groundwater electrical conductivity of saturated paste extract |
| Author Name | Affiliation | | WAN Shu-qin | Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | | SUN Jia-xia | Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | | DONG Shi-de | Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences，Beijing 100049，China | | KANG Yue-hu | Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences，Beijing 100049，China |
|
| Hits: 1650 |
| Download times: 1130 |
| Abstract: |
| The study analyzed the changes of shallow groundwater level, electrical conductivity of shallow groundwater (ECw), electrical conductivity of phreatic groundwater (ECi), electrical conductivity of saturated paste extract (ECe), the survival rate and preservation rate of Chinese wolfberry (Lycium barbarum L) during the process of low-lying and severe saline-sodic wasteland utilization in Hetao Irrigation District to provide scientific bases for large-scale exploitation and utilization of similar saline-sodic lands by using the “saline water drip irrigation + high ridge + film mulching” technology mode. The results showed that the shallow groundwater level, ECw, and ECe in the study area were significantly affected by both rainfall and irrigation in both surrounding areas and the study area. With the prolongation of wolfberry planting, water consumption by the plants increased, the shallow groundwater level decreased year by year, and the ECw, ECi, and ECe also decreased. The top 40 cm layer soil changed from very severe saline soil to heavy saline soil. Under this farming mode, the survival rate of wolfberry reached 75.4% and the preservation rate reached 67.5%. That is to say, by planting salt-tolerant perennial plants such as Chinese wolfberry and other salt-tolerant plants, the “saline water drip irrigation + high ridge + film mulching” practice mode can be adopted to exploit severe saline-sodic lands with shallow and saline groundwater, which are usually difficult to be effectively farmed by traditional methods. Through water consumption by plant, the groundwater level was significantly lowered and the shallow groundwater ECw and ECe also decreased yearly. |
|
|
|