江苏省典型农田耕作层土壤——谷物籽粒中镉的迁移转化特征

陈谊<sup>1</sup>; 吴春发<sup>2</sup>; 汪俊峰<sup>2</sup>

引用本文:	陈谊, 吴春发，汪俊峰.江苏省典型农田耕作层土壤——谷物籽粒中镉的迁移转化特征[J].环境监控与预警,2016,8(6):46-51
	CHEN Yi， WU Chun fa，WANG Jun feng.Study on Cadmium Transition and Transformation Characteristics between Typical Cultivated Layer Soil and Cereal Grain in Jiangsu Province[J].Environmental Monitoring and Forewarning,2016,8(6):46-51

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江苏省典型农田耕作层土壤——谷物籽粒中镉的迁移转化特征
陈谊, 吴春发，汪俊峰^1,2
1. 扬州市环境监测中心站，江苏扬州 225007;2. 南京信息工程大学，江苏南京 210044

摘要:

于2013年—2014年通过野外调查和盆栽试验的方法，采集江苏省境内典型农田耕作层（0~20cm）土壤及其对应点位的水稻/小麦籽粒，分析其中的ω（Cd）（全量、0.01mol/L CaCl₂提取态含量和0.05mol/LCaCl₂提取态含量），及Cd在土壤—谷物籽粒系统中的迁移转化特征。结果表明，水稻籽粒（糙米）中ω（Cd）与土壤pH值呈负相关，与0.01mol/LCaCl₂提取态含量呈正相关，且相关性在0.01水平下显著，而糙米中ω（Cd）与土壤中Cd总量以及土壤中的ω（有机质）的相关性较弱；麦粉ω（Cd）与0.01mol/LCaCl₂提取态含量、土壤中总ω（Cd）和土壤ω（有机质）呈显著正相关，而面粉中ω（Cd）与土壤pH值的相关性较弱，说明淹水可以有效降低水稻对Cd的吸收。

关键词: 耕作层土壤谷物籽粒镉迁移转化江苏省

DOI：

分类号:X825

文献标识码:B

基金项目:江苏省农业用地土壤环境质量标准研究基金资助项目（2012064）

Study on Cadmium Transition and Transformation Characteristics between Typical Cultivated Layer Soil and Cereal Grain in Jiangsu Province

CHEN Yi， WU Chun fa，WANG Jun feng

1.Yangzhou Environmental Monitoring Central Station， Yangzhou， Jiangsu 225007， China

Abstract:

In this paper， the typical cultivated layer soil (0～20 cm) and the rice/wheat grain from the corresponding points were gathered through field investigation and pot experiment in Jiangsu province from 2013 to 2014.The concentration of cadmium (total amount， 0.01 mol/L CaCl₂ extracting content and 0.05 mol/L CaCl₂ extracting content) were analyzed to find the cadmium transition and transformation characteristics between soil-cereal grain system. The results showed that cadmium content in rice grains (coarse rice) was negatively correlated with the soil pH value， but positively correlated with the 0.01 mol/L CaCl₂ extracting content， and there was a significant correlation under the 0.01 level. The correlation between cadmium in coarse rice， the soil total cadmium and the soil organic matter was weak. And there was a significantly positive correlation between cadmium in wheat flour and 0.01mol/LCaCl₂ extracting content， total cadmium and soil organic matter， but the correlation between cadmium in wheat flour and the soil pH was weak， which indicated that the flood could help rice reduce the absorption of cadmium effectively.

Key words: Typical cultivated layer soil Cereal grain Cadmium Transition and transformation Jiangsu