| 油-稻轮作模式下修复材料对土壤铜修复的持续性影响 |
| 摘要点击 1309 全文点击 632 投稿时间：2020-04-03 修订日期：2020-05-12 |
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| 中文关键词 修复材料 油菜-水稻轮作 铜污染 修复 持续性 |
| 英文关键词 remediation materials rape-rice rotation copper pollution remediation sustainability |
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| 中文摘要 |
| 通过3 a持续的油菜-水稻轮作小区实验，其中前2a连续施用修复材料，后1a不施用修复材料，探究羟基磷灰石、生石灰、生物炭、生物有机肥和纳米材料对铜污染土壤的修复效果，及其对铜在油菜和水稻不同部位的富集情况.结果表明，羟基磷灰石、生石灰和纳米材料均能显著提高土壤pH值；不同修复材料均可有效地抑制土壤铜的移动，以生石灰修复土壤处理的有效铜降幅最大，连续施用修复材料的四季分别为38.9%、34.9%、27.88%和29.04%，且生石灰钝化有效铜的后续效果也较其他修复材料理想.修复材料的施用，促使油菜和水稻可食用部分中铜含量显著降低，修复材料施用的四季中，不同作物可食用部分铜含量最大值分别降低46.03%、22.2%、29.44%和31.71%，由于修复材料的施用效果，不施修复材料两季节作物可食用部分中铜含量均未超过国家食品安全限值.不同修复材料的使用，油菜和水稻产量均有所提高.本文可为铜污染地区土壤改良提供一定的理论依据和技术支撑. |
| 英文摘要 |
| In this study, a continuous rape-rice rotation plot experiment was conducted over three years. Repair materials were continuously applied in the first two years, and no repair materials were applied in the second year. The repair effects of hydroxyapatite, lime, biochar, bio-organic fertilizer, and nano-materials on copper contaminated soil and the enrichment of copper in different parts of rape and rice were investigated. The results show that hydroxyapatite, lime, and nanomaterials can significantly increase soil pH, and different restoration materials can effectively inhibit the movement of soil copper. The effective copper treatment with lime restoration soil had the largest decrease. The four seasons of continuous application of restoration materials were 38.9%, 34.9%, 27.88%, and 29.04%, respectively, and the subsequent effect of lime passivation of effective copper was better than other restoration materials. The application of the repair material significantly reduced the copper content in edible parts of rape and rice. In the four seasons of application of the repair material, the maximum copper content in edible parts of different crops decreased by 46.03%, 22.2%, 29.44%, and 31.71%, respectively. Due to the application effect of the repair material, the copper content in the edible part of the two season crops, without the repair material, did not exceed the national food safety limit. With the use of different repair materials, the yields of rapeseed and rice were improved. This test can provide some theoretical basis and technical support for soil improvement in copper-contaminated areas. |
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