| Effect of substrate culture on the growth of different vegetables under brackish water irrigation |
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| DOI：10.7606/j.issn.1000-7601.2013.04.002 |
| Key Words: substrate culture brackish water vegetable growth |
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| Abstract: |
| Bohai Sea region has plenty of brackish water but short of freshwater resources. In attempt to find the solution to solve the problems of freshwater shortages and soil salinization caused by brackish water irrigation, we studied the effect of substrate culture on the growth of tomato, green pepper and eggplant under brackish water irrigation. The substrate used in this study was made of composting straw, perlite, and slag mixed in a mass ratio of 1∶1∶1. The depth of groove was 30 cm. All egetables were irrigated with 3 g·L-1 saline water. The results showed the growth and development of tomato and eggplant was significantly inhibited in substrate culture. Compared with s
oil cultivation, the plant height of tomato and eggplant were decreased 44.1% and 25.1% espectively, the biomass was decreased 80.4% and 48.9%, respectively, and the yield was decreased 49.2% and 27.6% respectively in substrate culture. Green pepper height and biomass were decreased 15.2% and 27.0%, but the yield was not affected significantly. The salinity of matrix and soil was measured. We found vegetables were subjected to salt stress in the substrate culture conditions, which led to a lower salt tolerance, lower membrane integrity and lower photosynthesis rate. In conclusion, this substrate culture was not suitable for deep root crops, but might be suitable for shallow root crops. The slag containing saline-alkali soil should not be used as matrix. |
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