| Effects of modifiers on saline soil salt distribution under brackish water irrigation conditions |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.024 |
| Key Words: soil amendment agent brackish water saline iron saline land improvement |
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| Abstract: |
| To clarify the influence of brackish water with 2～3 g·L-1 salinity on the improvement of cotton field soil, five kinds of soil amendments agents were used in this study. The results showed that all five agents could decrease pH values and total salt contents in the soil. Also, they could effectively control the accumulation of Na+, Ca2+, SO42- and HCO3-. In particular, phosphogypsum could significantly decrease the total content of Na+, Ca2+ and SO42- in the soil (P<0.05), and the DS1997 amendment could decrease the content of Na+ and HCO3- significantly (P<0.05). The acid-base equilibrium amendment could significantly decrease the content of Ca2+ and SO42- (P<0.05). In He Kang treatment, the contents of SO42- and HCO3- in the soil were efficiently controlled. However, these five soil amendments did not show significant effects in controlling the accumulation of Cl- (P<0.05) in this experiment. In conclusion, although brackish water irrigation could induce the increases of pH and saline contents in the soil, the soil amendments could limit and remit these effects significantly. In the meantime, soil amendments could improve the phi-chemical characteristics and saline ion distribution in the soil. |
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