辽河流域土壤酸化与作物籽实镉生物效应的地球化学预警

吉林大学学报(地球科学版) ›› 2012, Vol. 42 ›› Issue (6): 1889-1895.

辽河流域土壤酸化与作物籽实镉生物效应的地球化学预警

成杭新^1,2，杨晓波³，李括^1,2，刘飞^1,2，杨柯^1,2，聂海峰^1,2，彭敏^1,2，赵传冬^1,2，刘英汉^1,2

1.中国地质科学院地球表层碳-汞地球化学循环重点实验室，河北廊坊065000;
2.中国地质科学院地球物理地球化学勘查研究所, 河北廊坊065000;
3.辽宁省地质调查院，沈阳110032

收稿日期:2012-06-14 出版日期:2012-12-26 发布日期:2012-11-26
作者简介:成杭新(1964-)，男，研究员, 博士，主要从事勘查地球化学与生态地球化学研究，E-mail:hangxin@vip.sina.com
基金资助:
全国土壤现状调查及污染防治国家专项项目 (GZTR20060204)；国土资源部公益性行业科研专项项目 (200811043)

Geochemical Early Warning for Soil Acidification and Its Adverse Biological Effect of Cd in Rice and Maize Seeds in the Catchment Area of Liaohe, Liaoning Province

Cheng Hang-xin^1,2，Yang Xiao-bo³，Li Kuo^1,2，Liu Fei^1,2，Yang Ke^1,2，Nie Hai-feng^1,2，Peng Min^1,2，Zhao Chuan-dong^1,2，Liu Ying-han^1,2

1．Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth’s Critical Zone，CAGS, Langfang065000, Hebei, China;
2．Institute of Geophysical & Geochemical Exploration, CAGS, Langfang065000, Hebei, China;
3．The Liaoning Institute of Geological Survey, Shenyang110032

Received:2012-06-14 Online:2012-12-26 Published:2012-11-26

摘要/Abstract

摘要： 土壤酸化及其引发的生态安全问题是公众广泛关注、全球研究的热点。辽河流域多目标区域地球化学调查结果显示：当土壤中的w(CaO+K2O)≥3.86%时，土壤对酸性沉降物具有缓冲能力；当w(CaO+K₂O)<3.86%时，则土壤对酸性沉降物的缓冲能力显著下降。利用土壤酸化缓冲能力的地球化学预测模型，对全流域土壤酸化的缓冲能力进行了预测，指出辽河流域东部，即营口-鞍山-辽阳-沈阳-抚顺-铁岭-开源的广大区域内既是土壤酸化的脆弱区，也是作物籽实Cd超标的预警区，辽河流域土壤酸化区域将进一步扩大。

关键词: 土壤酸化, 镉, 大宗农作物, 地球化学预警, 辽河流域

Abstract: The impact of acidified soil and the subsequent effects on terrestrial ecosystems has raised public concern and become a hot research topic over the past decade. From 2002 to 2004, a systematic soil geochemical survey was conducted with the aim of studying the changing trend of the soil chemical elements in the catchment area of Liaohe in Liaoning Province. The results showed that the pH is unaffected by acid inputs when CaO+K₂O concentration in soil is more than 3.86%, which may buffer against the acidity inputs, whereas the soil pH drops rapidly when CaO+K₂O concentration in soil is lower than 3.86%. A map of buffering ability was developed, and it predicted that the soil in the eastern region of Liaohe catchment is much more vulnerable to further acidification. We then discuss the effects of increased Cd leaching upon soil acidic processes, biogeochemical processes, areas susceptible to Cd in rice and maize seeds are manifested.

Key words: soil acidification, cadmium, staple crops, geochemical early warning, catchment area of Liaohe

中图分类号:

P595

成杭新，杨晓波，李括，刘飞，杨柯，聂海峰，彭敏，赵传冬，刘英汉. 辽河流域土壤酸化与作物籽实镉生物效应的地球化学预警[J]. 吉林大学学报(地球科学版), 2012, 42(6): 1889-1895.

Cheng Hang-xin，Yang Xiao-bo，Li Kuo，Liu Fei，Yang Ke，Nie Hai-feng，Peng Min，Zhao Chuan-dong，Liu Ying-han. Geochemical Early Warning for Soil Acidification and Its Adverse Biological Effect of Cd in Rice and Maize Seeds in the Catchment Area of Liaohe, Liaoning Province[J]. Journal of Jilin University(Earth Science Edition), 2012, 42(6): 1889-1895.

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