| 石灰对稻米吸收Cd的影响及施用风险的区域调查与田间实验 |
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| 引用本文： | 戴雅婷, 杨阳, 傅开道, 李艳玲, 王美娥, 陈卫平. 石灰对稻米吸收Cd的影响及施用风险的区域调查与田间实验[J]. 环境工程学报, 2021, 15(4): 1473-1480. doi: 10.12030/j.cjee.202009010 |
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| 作者姓名： | 戴雅婷 杨阳 傅开道 李艳玲 王美娥 陈卫平 |
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| 作者单位： | 1.云南大学国际河流与生态安全研究院，昆明 650091; 2.中国科学院生态环境研究中心，城市与区域生态国家重点实验室，北京 100085 |
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| 基金项目： | 国家自然科学基金;城市与区域生态国家重点实验室项目 |
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| 摘 要： | 通过区域调查与田间实验相结合的方法探讨施用石灰对土壤-水稻系统镉(Cd)污染的控制效果和潜在风险.区域调查结果显示,研究区稻米Cd超标率高达72.6％;石灰处理可降低21.1％的土壤Cd活性和9.7％的稻米Cd超标率,并小幅提升土壤pH,但存在不确定性.田间实验结果显示,经石灰处理后,稻米Cd含量从0.26 mg·kg...
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| 关 键 词： | 石灰施用 土壤Mn浓度 土壤pH 生态风险 稻米Cd吸收因子 |
| 收稿时间： | 2020-09-02 |
Effects and application risk of liming on cadmium uptake by rice |
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| DAI Yating, YANG Yang, FU Kaidao, LI Yanling, WANG Meie, CHEN Weiping. Effects and application risk of liming on cadmium uptake by rice[J]. Chinese Journal of Environmental Engineering, 2021, 15(4): 1473-1480. doi: 10.12030/j.cjee.202009010 |
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| Authors: | DAI Yating YANG Yang FU Kaidao LI Yanling WANG Meie CHEN Weiping |
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| Affiliation: | 1.Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650091, China; 2.State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China |
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| Abstract: | The control effect and potential risk of lime application on soil-rice system cadmium (Cd) pollution were investigated based a method combining the regional investigation and the field experiment. Regional investigation showed that the over-limit ratio of Cd concentration in rice in the study area was as high as 72.6%, the use of lime could reduce the soil Cd activity by 21.1% and the rice Cd exceeding rate by 9.7%, and increase the soil pH slightly, but there was uncertainty. Field experiment showed that the concentration of Cd in rice with lime treatment decreased from 0.26 mg·kg−1 to 0.11 mg·kg−1, and the high accumulation variety (VU8) showed more sensitivity (decrease by 0.19 mg·kg−1). When the lime application rate increased from 1.20 t·hm−2 to 2.25 t·hm−2, the Cd content of rice did not decrease but increase. Varieties with high Cd accumulation are more sensitive to changes in lime usage. In addition to soil pH, soil Mn is the major influencing factor of Cd accumulation in rice, and the lime use lead a loss of soil Mn by 14.9%, which may be one of the reasons for the unstable effect of lime use. The effective way to solve the Cd pollution of rice is to adjust the amount of lime dosage and apply Mn fertilizer. |
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| Keywords: | lime application soil Mn concentration soil pH ecological risk rice Cd uptake factor |
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