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| DOI： |
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| Humic Acid in Natural Coal Affects Remediation of Saline-alkali Soil |
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GU Xin ， REN Cuimei, YANG Li, CHENG Ziliang, RUI Haiying, LIU Yang, WANG Xingzhu
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Daqing Branches of Heilongjiang Academy of Agricultural Sciences, Daqing 163316, China; Heilongjiang Tianyi Cheng Mining Group, Haerbin 150090, China
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| Abstract: |
| Pot experiments grown with pakchoi were conducted in this work to study the efficacy of humic acid within natural coal in remediating saline-alkali soil. Different humic acid-saline-alkali soil ratios were examined. The results showed that when humic acid-soil ratio was more than 1/2, the pakchoi grew but there was significant difference between all treatments. When humic acid-soil ratio was 4∶2 (H8), the average seedling emergence rate was 67.9%, leaf length was 8.6 cm, leaf width was 2.3 cm, and the mean root depth was 4.8 cm, all being significantly higher than those under other treatments (P<0.05). With an increase inhumic acid content, the soil pH and EC decreased, while soil water content increased. The natural coal humic acid played an improved role in pakchoi germination and growth in saline-alkali soil. |
| Key words: coal humic acid; saline-alkali soil; soil improvement; pakchoi |
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