| Spatio-temporal succession characteristics of saline-alkali soil profile salt in Jingdian Irrigation District |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2019.03.32 |
| Key Words: saline-alkali land different planting years characteristics of salinity Jingdian Irrigation District |
| Author Name | Affiliation | | WANG Rong-rong | ollege of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China | | XU Cun-dong | College of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China
Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, Zhengzhou, Henan 450046, China | | LIU Hui | China Institute of Water Resources and Hydropower Research, Beijing 100038, China | | ZHANG Rui | ollege of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China | | CHENG Hui | Henan Tianchi Pumping and Energy Storage Co., Ltd., Nanyang, Henan 473000, China | | WANG Yan | ollege of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China |
|
| Hits: 1253 |
| Download times: 363 |
| Abstract: |
| Over a long-term comprehensive improvement of the saline-alkali land in the arid Yellow River Irrigation Districts in northwest China, the soil chemical properties have been changing temporally and spatially. The Jingtaichuan Electric Irrigation District (hereinafter referred to as “Jingdian Irrigation District”) was taken as the typical study area. The soil samples were collected from 0~80 cm layers of the selected areas on different cultivation years (5, 10, 15 a), and an uncultivated saline-alkali wasteland near the test site was selected as a control. The total soluble salts (TS), pH, and various salt ions were measured and analyzed to explore the spatio-temporal differentiation of salt in the saline-alkali soil profile. The results showed that with the extension of cultivation years, the salinity of soil profile was significantly decreasing that the TS of soil profile reduced from 4.081 g·kg-1 to 0.411 g·kg-1 with the 15a, while the pH was slowly increasing from 8.30 to 9.05 during the period. The concentration of HCO-3 did not change much and the values of other salt ions and SAR, Cl-/SO2-4 were decreasing. It indicated that with the extension of cultivation years, the soil conditions had been greatly improved, which is beneficial to the crops growth. However, the long-term comprehensive improvement of the saline-alkali land resulted in the alkalization tendency of cultivated land. |
|
|
|