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| DOI：10.13522/j.cnki.ggps.2017.0499 |
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| Comparative Study of Different Methods for Remediating Coastal Saline Soil and Their Consequent Impact on Growth of Fraxinus Chinensis |
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XIAO Hui, CHENG Wenjuan, PAN Jie, JIANG Yinqing, WANG Liyan, ZHAO Jie, XIAO Qian
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Tianjin Institute of Agricultural Resources and Environment, Tianjin 300192, China;Tianjin Fulin Development Co.LTD, Tianjin 300457, China
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| Abstract: |
| 【Objective】 The purpose of this work is to experimentally study the efficacy of different agronomical methods for remediating costal saline soil and their consequent impact on growth of Fraxinus Chinensis. 【Method】 A two-year experiment was conducted with the groundwater table kept below critical depth by French drain. Three methods were compared: incorporating cow manure into deep subsoil (T1), incorporating cow manure into deep soil combined with a straw mulching (T2), incorporating cow manure into deep soil with plant grown over the drain (T3). The model plant in all treatments was Fraxinus Chinensis. 【Result】 Compared to the control (no remediation), all three methods reduced the soil salt content to 3 g/kg or below and improved the survival rate and growth of Fraxinus chinensis. Treatment T1, T2 and T3 reduced the average 0~60 cm salt contents by 62.42%, 65.33% and 72.92%, respectively. The survival rate of Fraxinus chinensis under T1, T2 and T3 was 0.72, 0.88 and 0.85 respectively, compared to 3.03% in the CK. The length of new branches of Fraxinus Chinensis under T1, T2 and T3 was 33.33 cm, 45.78 cm and 48.45 cm respectively, increasing by 1 148%, 1 615% and 1 715%, respectively, compared to the CK. 【Conclusion】 Among the three tested methods, T2 and T3 were more efficient in removing soil salt and promoting plant growth, offering an effective way to remediating coastal saline soil. |
| Key words: coastal saline soil; native soil planting; rapid desalination; fraxinus chinensis |
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