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| 不同比例钙锌共存对土壤镉有效性的影响及其机制 | |
| 引用本文： | 宋正国,徐明岗,刘平,孙楠,唐世荣.不同比例钙锌共存对土壤镉有效性的影响及其机制[J].生态环境,2008,17(5). |
| 作者姓名： | 宋正国 徐明岗 刘平 孙楠 唐世荣 |
| 作者单位： | 1. 农业部环境保护科研监测所生态毒理与环境修复研究中心,天津,300191;中国农业科学院农业资源与农业区划研究所//农业部植物营养与养分循环重点开放实验室,北京,100081 2. 中国农业科学院农业资源与农业区划研究所//农业部植物营养与养分循环重点开放实验室,北京,100081 3. 农业部环境保护科研监测所生态毒理与环境修复研究中心,天津,300191 |
| 基金项目： | 国家重点基础研究发展计划(973计划) ， 国家引进国际先进农业科学技术计划(948计划) ， 北京市自然科学基金 |
| 摘 要： | 采用盆栽试验,研究了赤红壤上两种镉污染水平下,施用不同比例钙锌对小油菜(Brassica Campetris,Lvar Conmuni)生物量、镉吸收量及土壤溶液中镉、钙、锌质量浓度的影响.结果表明,钙、锌以不同比例共存时并不会对赤红壤上小油菜的生长产生明显的影响;随着锌用量增加,土壤溶液中锌的质量浓度明显增加,土壤溶液中镉的质量浓度明显升高.小油菜体内镉含量明显降低;高镉污染赤红壤上,钙锌共存中钙用量增加,土壤溶液中钙的质量浓度明显增加.低、高镉污染赤红壤上,钙、锌共存摩尔比例为4:1时,小油菜体内镉含量较对照平均分别降低34.2%和27.3%(两季平均值);而土壤溶液中镉的质量浓度较对照分别增加307%和120%.在低镉污染赤红壤上,锌施用量与小油菜体内镉含量呈显著负相关;高镉污染赤红壤上,锌施用量与土壤溶液中镉的质量浓度呈显著正相关.钙、锌以不同比例施入土壤时,锌施用量多少是控制土壤镉有效性高低的主要因素. |
| 关 键 词： | 镉 锌 小油菜(Brassica Campetris Lvar Conmuni) 赤红壤 有效性 |
Effect of coexistence of calcium and zinc at different ratios on the cadmium bioavailability in lateritic red soils and its mechanisms |
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| Song Zhengguo,Xu Minggang,Liu Ping,Sun Nan,Tang Shirong.Effect of coexistence of calcium and zinc at different ratios on the cadmium bioavailability in lateritic red soils and its mechanisms[J].Ecology and Environmnet,2008,17(5). | |
| Authors: | Song Zhengguo Xu Minggang Liu Ping Sun Nan Tang Shirong |
| Institution: | Song Zhengguo1,2,Xu Minggang2,Liu Ping2,Sun Nan2,Tang Shirong1 1. Institute of Environmental Protection,Ministry of Agriculture of China,Centre for Research in Ecotoxicology , Environmental Remediation,Tianjing,300191,China,2. Institute of Agricultural Resources , Regional Planning,Chinese Academy of Agricultural Sciences,, Key Laboratory of Plant Nutrition , Nutrient Cycling,Beijing 100081 |
| Abstract: | Pot experiments were conducted in two lateritic red soils with different Cd levels to investigate the effect of Ca/Zn applications at different ratios on the rape biomass,amounts of Cd uptake by rape,as well as Zn,Ca and Cd concentrations in lateritic red soil solutions. The results showed that the coexistence of Ca and Zn at different ratios did not exert significant effect on the rape growth. Increasing Zn ratio in the Ca/Zn application resulted in the elevated levels of Zn and Cd in soil solutions,while ... |
| Keywords: | Cd Zn rape lateritic red soil bioavailability |
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