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| 落叶中DOM和NDOM对紫色土中Cu迁移的影响 |
| Effects of DOM and NDOM in Defoliation on Copper Migration in Purple Soil |
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| DOI： |
| 中文关键词: 可溶性有机质 不可溶性有机质 Cu迁移 紫色土 落叶 |
| 英文关键词: DOM NDOM Copper migration Purple soil Defoliation |
| 基金项目:国家自然科学基金资助项目(41271244)；四川省科技厅基金资助项目(2018JY0224)；西华师范大学科研业务基金资助项目(18B023) |
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| 中文摘要: |
| 以黄葛榕落叶中可溶性有机质(DOM)和不可溶性有机质(NDOM)为研究对象，分析用DOM、NDOM和DOM+NDOM改良碱性(Al-P)、中性(Ne-P)和酸性紫色土(Ac-P)后，土中Cu的形态变化。结果表明：随着老化时间的增加，各改良紫色土中离子交换态Cu含量均明显降低，碳酸盐结合态Cu含量基本保持不变，铁锰氧化物结合态和有机结合态Cu含量均逐渐增加。老化后，供试改良紫色土中Cu表现为有机结合态≈铁锰氧化物结合态＞碳酸盐结合态＞离子交换态的趋势，Cu迁移能力整体降低，降低幅度为44.22%~68.99%。 |
| 英文摘要: |
| In this paper, dissolved organic matter (DOM) and insoluble organic matter (NDOM)in defoliation (Ficus lacor) were selected as research objects, the changes of Cu morphology in alkaline (Al P), neutral (Ne P) and acidic purple soil (Ac P) improved by DOM, NDOM and DOM+NDOM were analyzed. The results showed that with the increase of aging time in each improved purple soil, the content of ion exchange Cu decreased significantly, the content of carbonate bound Cu remained unchanged, and the content of Cu in Fe Mn oxides bound and organic bound increased gradually. After aging, Cu content in improved purple soil in various forms showed a trend of organic bound ≈ Fe Mn oxides bound＞carbonate bound＞ion exchanged state.The migration capacity of Cu decreased by 44.22%~68.99%. |
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