[1]董海霞,赵明柳,唐守寅,等.石灰对土壤中Cd 和Zn 形态及对水稻有效性的影响[J].江苏农业学报,2016,(06):1320-1328.[doi:doi:10.3969/j.issn.1000-4440.2016.06.020]
　DONG Hai-xia,ZHAO Ming-liu,TANG Shou-yin,et al.The effects of liming on the fraction and bioavailability to rice of Cd and Zn in a contaminated soil[J].,2016,(06):1320-1328.[doi:doi:10.3969/j.issn.1000-4440.2016.06.020]
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石灰对土壤中Cd 和Zn 形态及对水稻有效性的影响()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2016年06期
页码:
1320-1328
栏目:
耕作栽培·资源环境
出版日期:
2017-02-07

文章信息/Info

Title:
The effects of liming on the fraction and bioavailability to rice of Cd and Zn in a contaminated soil
作者:
董海霞; 赵明柳; 唐守寅; 李荭荭; 陈炎辉; 谢团辉; 王果
（福建农林大学资源与环境学院，福建福州350002）
Author(s):
DONG Hai-xia; ZHAO Ming-liu; TANG Shou-yin; LI Hong-hong; CHEN Yan-hui; XIE Tuan-hui; WANG Guo
(College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China)
关键词:
水稻; 形态; 石灰; Cd; Zn; pH值
Keywords:
rice; soil fraction; lime; Cd; Zn; pH
分类号:
S158.3
DOI:
doi:10.3969/j.issn.1000-4440.2016.06.020
文献标志码:
A
摘要:
为了明确石灰对土壤中Cd、Zn形态的影响，探讨Cd、Zn各形态含量与水稻糙米中Cd、Zn含量之间的关系，本研究采用盆栽试验，通过BCR法提取不同化学形态的Cd、Zn。结果表明，施用石灰明显提高了土壤的pH值，减少了土壤中弱酸提取态Cd、Zn含量，增加了土壤可还原态和残渣态Cd、Zn含量。土壤pH值与弱酸提取态Cd、Zn含量之间呈极显著性负相关，而与残渣态Cd、Zn含量呈极显著性正相关，表明石灰通过提高土壤pH值促使Cd、Zn从弱酸提取态向残渣态转化，从而降低土壤中Cd、Zn的有效性。弱酸提取态Cd、Zn含量与水稻糙米中Cd、Zn含量呈显著正相关，因此，通过施用石灰降低土壤弱酸提取态Cd、Zn含量，可减少土壤中Cd、Zn在糙米中的累积。石灰的施用也降低了根表铁膜中Cd、Zn的含量，但铁膜中Cd、Zn含量与土壤弱酸提取态Cd、Zn含量、根系中Cd、Zn含量之间的关系较复杂，表明了根表铁膜对水稻吸收Cd、Zn影响的复杂性。石灰对土壤中Cd有效性的抑制程度大于Zn。
Abstract:
Pot experiments using a Cd-Pb-Zn contaminated soil were conducted to study the effects of liming on BCR-extractable fractions of Cd and Zn in the soil, and the uptake and accumulation of Cd and Zn by two rice cultivars. The results showed that liming significantly increased soil pH, reduced weak acid extractable (Aci-) Cd and Zn, and rose reducible and residual Cd and Zn in the soil. Soil pH had a significantly negative correlation with Aci- Cd and Zn, and a positive correlation with residual Cd and Zn, which indicated that liming could transform Aci-Cd and Zn into residual forms through increasing soil pH. The content of Cd and Zn in brown rice was positively correlated with Aci- Cd and Zn. It was obviously that liming reduced the content of Aci- Cd and Zn and then led to a less accumulation of Cd and Zn in the brown rice. The contents of Cd and Zn in iron plaques on root surface were also decreased by liming. However, the contents of Cd and Zn in iron plaques showed complicated relationships with Aci- Cd and Zn, and Cd and Zn in the brown rice, which indicated uncertainty of iron plaque on uptake and accumulation of Cd and Zn by rice. The availability of Cd was more significantly depressed than that of Zn by liming.

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备注/Memo

备注/Memo:
收稿日期：2016-03-06 基金项目：国家自然科学基金促进海峡两岸科技合作联合基金项目（u1305232） 作者简介：董海霞（1986-）,女，河南太康人,硕士，主要从事土壤重金属污染生态方面的研究。(E-mail)1282774085@qq.com 通讯作者：王果，(E-mail)1400619353@qq.com
更新日期/Last Update: 2017-02-07