| 松阳县典型中轻度污染耕地镉输入输出平衡研究 |
| |
| 引用本文： | 徐火忠,吴东涛,李贵松,吴林土,叶春福,郭彬,马嘉伟,叶正钱,柳丹.松阳县典型中轻度污染耕地镉输入输出平衡研究[J].浙江农林大学学报,2021,38(6):1231-1237. |
| |
| 作者姓名： | 徐火忠 吴东涛 李贵松 吴林土 叶春福 郭彬 马嘉伟 叶正钱 柳丹 |
| |
| 作者单位： | 1.松阳县农业农村局，浙江 松阳 3234002.丽水市土肥植保能源总站，浙江 丽水 3230003.浙江省农业科学院，浙江 杭州 3100214.浙江农林大学 环境与资源学院，浙江 杭州 3113005.浙江农林大学 浙江省土壤污染生物修复重点实验室，浙江 杭州 311300 |
| |
| 基金项目： | 浙江省重点研发计划项目(2018C03028) |
| |
| 摘 要： | 目的 为准确了解浙江省丽水市松阳县农田土壤中镉(Cd)污染来源并制定修复对策。 方法 2017?2019年，以浙江省丽水市松阳县典型耕地为研究对象，通过采集当地的投入品和农作物，连续3 a监测重金属Cd的输入和输出量。 结果 2017?2019年，研究区肥料与大气沉降是Cd的主要农业污染来源，占比分别为49.78%和40.16%、50.20%和39.14%、34.04%和48.09%；投入品每年Cd的总输入量分别占土壤Cd总量的0.18%、0.17%和0.14%。水稻Oryza sativa、油菜Brassica napus与茶Camellia sinensis的Cd年总输出量分别为2 820.00、2 706.00和2 629.50 mg·hm?2·a?1，年平均输出量为2 718.50 mg·hm?2·a?1，年平均输出量总体较为平稳。2017?2019年间Cd年输入量和输出量均逐年降低，但Cd年输出量均大于Cd年输入量，其原因可能是Cd在植物中出现了富集。 结论 该地区Cd的农业污染来源主要为肥料和大气沉降，环境及农投品整体属于清洁水平，但大气沉降量有上升的趋势，因此需对该区域继续实施长期监测；植物的年输出量均大于投入品的输入量，因此需避免秸秆直接还田，并及时修复当地受污染的土壤以及种植的植物。图1表5参25
|
| 关 键 词： | 耕地土壤 重金属 镉污染 输入输出 松阳县 |
| 收稿时间： | 2020-11-24 |
Input and output balance of cadmium (Cd) in cultivated land with moderate pollution in Songyang County |
| |
| XU Huozhong,WU Dongtao,LI Guisong,WU Lintu,YE Chunfu,GUO Bin,MA Jiawei,YE Zhengqian,LIU Dan.Input and output balance of cadmium (Cd) in cultivated land with moderate pollution in Songyang County[J].Journal of Zhejiang A&F University,2021,38(6):1231-1237. |
| |
| Authors: | XU Huozhong WU Dongtao LI Guisong WU Lintu YE Chunfu GUO Bin MA Jiawei YE Zhengqian LIU Dan |
| |
| Affiliation: | 1.Agricultural and Rural Bureau of Songyang County, Songyang 323400, Zhejiang, China2.Soil Fertilizer and Plant Protection Station of Lishui City, Lishui 323000, Zhejiang, China3.Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China4.College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China5.Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China |
| |
| Abstract: | Objective This study is aimed at an accurate interpretation of the source of Cd pollution in farmland soil so as to put forward relevant suggestions for soil heavy metal remediation. Method An investigation was conducted of the input and output of heavy metal Cd in a typical piece of cultivated land in Songyang County of Zhejiang Province for three consecutive years by collecting local inputs and crops. Result During the period time from 2017 to 2019, fertilizer and atmospheric deposition were the main agricultural pollution sources of Cd, accounting for 49.78% and 40.16%, 50.20% and 39.14%, 34.04% and 48.09% respectively whereas the total input of Cd accounted for 0.18%、0.17% and 0.14% of the total soil Cd, respectively. The total output of Cd from rice, rape and tea were 2820.00, 2706.00 and 2629.50 mg·hm?2·a?1, respectively, with an average of 2718.50 mg·hm?2·a?1 and a relatively stable overall annual average output and the annual input and output decreased year by year, but the annual output was greater than the annual input, which may attribute to the enrichment of plant species. Conclusion It is advisable to devote efforts in the continuous implementation of long-term supervision over the atmospheric deposition in the region, the avoidance of direct return of straws to the field, the effective utilization of resources, and the timely restoration of the local contaminated soil and plants. Ch, 1 fig. 5 tab. 25 ref.] |
| |
| Keywords: | |
|
| 点击此处可从《浙江农林大学学报》浏览原始摘要信息 |
|
点击此处可从《浙江农林大学学报》下载全文 |
|
