| 许根焰,宋静,高慧,张厦.贵州省白菜种植土壤镉风险管控标准研究[J].农业环境科学学报,2019,38(7):1490-1497. |
| 贵州省白菜种植土壤镉风险管控标准研究 |
| Derivation of risk screening and intervention values for cadmium-contaminated agricultural land based on Chinese cabbage in the Guizhou Province |
| 投稿时间：2018-12-25 |
| DOI：10.11654/jaes.2018-1629 |
| 中文关键词: 风险筛选值 风险管制值 土壤-作物迁移模型 镉 |
| 英文关键词: risk screening values risk intervention values soil-crop transfer model cadmium |
| 基金项目:中国科学院科技服务网络计划项目（KFJ-STS-ZDTP-005） |
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| 摘要点击次数: 2018 |
| 全文下载次数: 1812 |
| 中文摘要: |
| 为制定针对具体作物的土壤Cd地方标准，以贵州省为典型区域，采集6种典型土壤开展人工Cd污染土壤盆栽试验，建立白菜可食部分Cd与土壤总Cd、HNO3-Cd及CaCl2-Cd之间的关系，以食品中污染物限量反推安全种植白菜的土壤Cd筛选值（RSVs50或RSVs95）和管制值（RIVs95），并进行适宜性验证。结果表明：土壤总Cd和两种有效态Cd均能与白菜可食部分Cd含量建立极显著的一元回归模型，考虑pH的多元回归模型R2值显著提高；5.5≤pH≤8.0时，土壤总Cd的筛选值RSVs50（0.8~1.7 mg·kg-1）和管制值RIVs95（2.8~8.4 mg·kg-1）均高于现行国家标准；5.5≤pH≤8.0时，基于0.43 mol·L-1 HNO3提取态Cd的土壤筛选值和管制值随pH升高而增大；基于0.01 mol·L-1 CaCl2提取态的土壤Cd管控标准与土壤pH无关，筛选值RSVs95、RSVs50和管制值RIVs95分别为0.02、0.078、0.09 mg·kg-1；标准适宜性验证结果表明，现行土壤Cd筛选值和管制值均偏保守（保守率>68%），本研究推导的土壤总量和两种有效态Cd的筛选值RSVs50合适率均较高（>80%）。因此，为更好地指导农用地分类管理，有必要制定基于有效态和特定作物的地方土壤环境标准。 |
| 英文摘要: |
| The objective of this study was to derive regional soil Cd criteria for cultivated land. Six representative soils were collected from Guizhou plateau and were spiked with Cd(NO3)2 in a pot experiment using Chinese cabbage. Two widely utilized extractants, 0.43 mol·L-1 HNO3 and 0.01 mol·L-1 CaCl2, were also included to evaluate the phytoavailability of Cd and were correlated to Cd concentrations in cabbage by either linear regression or multi-linear regression(log transformed). Soil Cd risk screening values(RSVs)and risk intervention values(RIVs)were back calculated based on food quality standards. The results indicated that total Cd and available Cd could be used to establish a highly significant regression model or multiple regression model for the Cd content in the edible parts of Chinese cabbage. Within the pH range(5.5 ≤ pH ≤ 8.0), the calculated soil Cd RSVs50(0.8~1.7 mg·kg-1)and RIVs95(2.8~8.4 mg·kg-1)were higher than the existing national standard(GB 15618-2018). The 0.43 mol·L-1 HNO3-Cd based soil Cd criteria increased with increasing soil pH. The 0.01 mol·L-1 CaCl2-Cd based soil Cd criteria was independent of soil pH. RSVs95, RSVs50, and RIVs95 were 0.02, 0.078 mg·kg-1, and 0.09 mg·kg-1, respectively. Standard suitability assessment using field and literature data showed that the existing national soil Cd standard was rather conservative. The RSVs50 based on total Cd and two available Cd proposed in this study showed a high rate of correctness(>80%). The present study confirmed that for better risk management of agricultural land, the establishment of regional soil environmental standards based on available concentration and specific crops is required. |
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