| Effects of drip irrigation with different saline water on salt and water characteristics in saline-alkali soil and oil sunflower growth |
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| DOI：10.7606/j.issn.1000-7601.2015.05.31 |
| Key Words: oil sunflower drip irrigation with saline water mineralization degree soil water content salt saline-alkali soils |
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| Abstract: |
| Pointed at large area distribution of Baijiang saline-alkali soil in northern Ningxia, through the continuous 2 years fixed position field experiment, have researched the effects of different saline water（0.2、1、2、3、4、5 g·L-1）on salt and water characteristics and oil sunflower growth, with the condition of drip irrigation under plastic film. The results showed that: When using the lower saline water (0.2、1 g·L-1) for drip irrigation, the soil put up better soil infiltration performance. As the water mineralization degree increased from 0.2 g·L-1 to 5 g·L-1, the soil water content at 40～60 cm depth was increase at first then decrease. The treatment of lower saline water has showed an obvious effect of salt leaching, but with high saline water irrigation resulted in large salt accumulation in soil, which led to the damage of crop growth or even death. Using the micro salty water of 1 g·L-1 for drip irrigation, could be obtained better growth and rather higher yield. Therefore, the micro salty water of 1 g·L-1 could be used to plant the oil sunflower by the drip irrigation under plastic film, also to reclaim the Baijiang saline-alkali soils. |
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