[1]ZHU Jinjin,SUN Junna,ZHANG Zhenhua,et al.Effects of Alternate Irrigation with Brackish and Fresh Water on Water and Salt Movement in Coastal Saline Soil[J].Research of Soil and Water Conservation,2019,26(05):113-117,122.
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Effects of Alternate Irrigation with Brackish and Fresh Water on Water and Salt Movement in Coastal Saline Soil
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 05
Page number:
113-117,122
Column:
Public date:
2019-09-06
- Title:
- Effects of Alternate Irrigation with Brackish and Fresh Water on Water and Salt Movement in Coastal Saline Soil
- Keywords:
- alternate irrigation; duration of infiltration; soil salt content; Na+ content; Cl- content
- CLC:
- S274.1;S273.4
- DOI:
- -
- Abstract:
- Saline soil is characterized by poor permeability and high salt content, which seriously restricts agricultural production. In this study, we investigated the effects of alternate irrigation with brackish and fresh water on water and salt movement in a coastal saline soil of the Yellow River Delta region. We conducted laboratory simulation soil column experiments and monitored changes in water infiltration and salt distribution in the soil under six irrigation treatments, including three kinds of salinity (3 g/L, 6 g/L, and 9 g/L) and two sequences (brackish-fresh water and fresh-brackish water). The results showed that the duration of water infiltration into the soil increased with the rise of salinity under brackish-fresh water and fresh-brackish water, with the higher value recorded at fresh-brackish water. There was no significant difference in the mean soil water content under the brackish-fresh water (32.15%~33.29%) and fresh-brackish water (32.95%~33.58%) irrigation treatments. However, the mean soil salt content under treatement of brackish-fresh water (3.915~4.773 g/kg) was lower than that under the treatment of fresh-brackish water (4.255~5.313 g/kg), and much lower soil salt content was observed at 3 g/L of salinity compared with other levels of salinity. From the perspective of reducing soil salt content, saline water with lower salinity (3 g/L) is the optimal strategy for alternate irrigation with brackish and fresh water in the study region.
- References:
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1900-01-01