吕丹蕾,王震,张闯闯,刘文婧,张铁亮,纪雄辉,赵玉杰.长株潭地区稻田土壤淹水后有效态镉变异的主控因子研究[J].农业环境科学学报,2025,44(4):942-951. |
长株潭地区稻田土壤淹水后有效态镉变异的主控因子研究 |
Study on main controlling factors of available cadmium variation in paddy soil after flooding in Changsha-Zhuzhou-Xiangtan area |
投稿时间:2024-04-09 |
DOI:10.11654/jaes.2024-0294 |
中文关键词: 镉 梯度扩散薄膜(DGT)技术 逐步回归模型 混合线性回归模型 释放 |
英文关键词: cadmium gradient diffusion thin film(DGT)technology stepwise regression model Cubist model release |
基金项目:国家重点研发计划子课题:区域产地镉砷污染数据智能甄别与时空同化(2022YFD1700105) |
作者 | 单位 | E-mail | 吕丹蕾 | 农业农村部农产品质量安全环境因子控制重点实验室, 天津 300191 农业农村部环境保护科研监测所, 天津 300191 | | 王震 | 天津市农业科学院农产品质量安全与营养研究所, 天津 300191 | | 张闯闯 | 农业农村部农产品质量安全环境因子控制重点实验室, 天津 300191 农业农村部环境保护科研监测所, 天津 300191 | | 刘文婧 | 农业农村部农产品质量安全环境因子控制重点实验室, 天津 300191 农业农村部环境保护科研监测所, 天津 300191 | | 张铁亮 | 农业农村部农产品质量安全环境因子控制重点实验室, 天津 300191 农业农村部环境保护科研监测所, 天津 300191 | | 纪雄辉 | 湖南省农业环境生态研究所, 湖南 410125 | | 赵玉杰 | 农业农村部农产品质量安全环境因子控制重点实验室, 天津 300191 农业农村部环境保护科研监测所, 天津 300191 | zhaoyujie@126.com |
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中文摘要: |
为评估我国长株潭地区土壤性质对土壤有效态镉(Cd)的影响机制,本文以该地区稻田土壤为研究对象,采用梯度扩散薄膜(DGT)技术探索了短期淹水后不同土壤Cd有效态含量的差异性,并采用逐步回归、混合线性回归(Cubist)等数据挖掘方法分析了控制 Cd释放的环境因子的单独及联合作用效能。结果表明,土壤总 Cd含量变化可以解释 Cd释放变异的 75%,土壤其他因素如铁锰氧化物、有机质、土壤协同阳离子(如Cu)、pH等在不同条件下对Cd释放的影响存在差别。土壤总Cd是影响Cd释放的第一主控因子,锰结合态的Cd更容易释放到土壤溶液中,促进Cd活性增加;高含量铁抑制Cd的活性,同时铁结合态Cd也会释放到土壤溶液中成为有效态Cd的一部分;Cu与Cd之间由于原电池效应而表现为Cu含量增加促进Cd的释放,但作用效能偏弱;有机质对Cd释放的抑制作用在高Cd土壤中有所体现,采样区pH变异性较弱,对Cd释放的控制作用易被其他相关因子如Mn掩盖。 |
英文摘要: |
In Changsha-Zhuzhou-Xiangtan area of China, it is important to evaluate the mechanism of soil properties affecting soil available cadmium(Cd). In this paper, gradient diffusion film(DGT)technology was used to explore the differences of Cd content in different soils after short-term flooding, and data mining methods such as stepwise regression and mixed linear regression(Cubist)were used to analyze the independent and combined effects of environmental factors controlling Cd release. The results showed that the variation of total Cd content in soil could explain 75% of the variation of Cd release, and other soil factors such as Fe and Mn oxides, organic matter, soil antagonistic cations(such as Cu)and pH had different effects on Cd release under different conditions. Cadmium in manganese binding state is more easily released into soil solution, which promotes the increase of Cd activity. High content of iron inhibits the activity of Cd, and iron-bound Cd is also released into the soil solution to form a part of available Cd. Due to the galvanic effect between Cu and Cd, the increase of Cu content promotes the release of Cd, but the effect is weak. The inhibition effect of organic matter on Cd release is reflected in the soil with high Cd content, the pH variability in the sampling area is weak, and the control effect on Cd release is easily masked by other related factors such as Mn. |
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