| 土壤改良剂及其组合原位钝化果园土壤中的Pb、Cd |
| 摘要点击 3920 全文点击 1219 投稿时间：2011-12-03 修订日期：2012-03-16 |
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| 中文关键词 土壤改良剂 果园土壤 重金属 原位钝化 生物有效性 |
| 英文关键词 soil ameliorant orchard soil heavy metals in situ immobilization bioavailability |
| 作者 | 单位 | E-mail | | 汤民 | 西南大学资源环境学院,三峡库区生态环境教育部重点实验室,重庆 400715 | 314937840@qq.com | | 张进忠 | 西南大学资源环境学院,三峡库区生态环境教育部重点实验室,重庆 400715
重庆市农业资源与环境重点实验室,重庆 400716 | jzhzhang@swu.edu.cn | | 张丹 | 西南大学资源环境学院,三峡库区生态环境教育部重点实验室,重庆 400715 | | | 陈舜 | 西南大学资源环境学院,三峡库区生态环境教育部重点实验室,重庆 400715 | | | 张训 | 西南大学资源环境学院,三峡库区生态环境教育部重点实验室,重庆 400715 | | | 刘万平 | 重庆市缙云山园艺发展有限公司,重庆 400700 | | | 余建 | 重庆市缙云山园艺发展有限公司,重庆 400700 | |
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| 中文摘要 |
| 采用土壤改良剂及其组合,研究了重庆市金果园2个园区土壤中Pb、Cd的原位钝化效果. 实验包括8种处理:对照、生石灰、过磷酸钙、有机肥、生石灰+过磷酸钙、生石灰+有机肥、过磷酸钙+有机肥、生石灰+过磷酸钙+有机肥. 结果表明,除单施过磷酸钙外,其它改良剂处理都能降低枇杷园和桃园土壤酸度. 与对照比较,单施生石灰可显著提高枇杷园和桃园土壤pH,处理120 d时土壤pH分别提高0.93和0.79个单位. 改良剂处理均能降低土壤中Pb、Cd的生物有效性,进而降低果品中的Pb、Cd含量. 配施生石灰和过磷酸钙可显著降低枇杷园和桃园土壤有效态Pb含量,处理150 d时分别下降3.46%和3.56%,枇杷和桃子中Pb含量分别下降18.3%和14.44%. 单施生石灰可显著降低枇杷园土壤有效态Cd含量,处理150 d时下降10.95%; 配施生石灰、过磷酸钙和有机肥能显著降低桃园土壤有效态Cd含量,处理150 d时下降7.09%. 施加改良剂可进一步降低枇杷中的Cd含量,单施生石灰使枇杷和桃子中的Cd含量分别下降30.91%和24.62%. |
| 英文摘要 |
| In situ immobilization of Pb and Cd in soil of two gardens in Golden Orchard of Chongqing was studied using soil ameliorants, which included eight treatments: control, quicklime, superphosphate, organic manure, quicklime+superphosphate, quicklime+organic manure, superphosphate+organic manure, and quicklime+superphosphate+organic manure. The results showed that all ameliorant treatments could decrease soil acidity in both the loquat garden and peach garden except the superphosphate treatment. Compared with the control, the soil pH in the two gardens increased by 0.93 and 0.79 with quicklime treatment for 120 d, respectively. Ameliorant treatments could decrease the bioavailability of Pb and Cd in the soil, and thus reduce the contents of Pb and Cd in the fruits. The available Pb contents in the soil of loquat garden and peach garden significantly decreased after the 150 d treatment with quicklime and superphosphate, by 3.46% and 3.56%, respectively, and the Pb contents in loquat and peach decreased by 18.3% and 14.44%, respectively. The available Cd content in the soil of loquat garden decreased by 10.95% after the 150 d treatment with quicklime. The available Cd content in the soil of peach garden decreased by 7.09% after the 150 d treatment with quicklime, superphosphate and organic manure. Ameliorant treatments could further decrease the Cd content in loquat, and the Cd contents in loquat and peach decreased by 30.91% and 24.62% with quicklime treatment, respectively. |
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