PDF《长期施肥对砂姜黑土重金属形态特征的影响》

收稿日期: 2013-03-26 基金项目: 教育部高校留学回国人员科研项目及国家自然科学基金(31071868)共同资助.

作者简介: 赵婷,女,硕士研究生.E-mail:shiyushilin@sohu.com * 通信作者: 束良佐,男,博士,教授.E-mail:shulz69@163.com 安徽农业大学学报, 2013, 40(5): 855-859 Journal of Anhui Agricultural University 网络出版时间:2013-8-23 8:20:16 [URL] http://www.cnki.net/kcms/detail/34.1162.S.20130823.0820.014.html 长期施肥对砂姜黑土重金属形态特征的影响 赵婷1,2 ,束良佐 2* ,于红梅

1 ,曹利锋

2 ,曹双2,张存岭 3,4 ,张景华

4 (1. 浙江师范大学地理与环境科学学院,金华 321000;

2. 淮北师范大学生命科学学院,淮北 235000;

3. 安徽省濉溪县科学技术协会,濉溪 235100;

4. 安徽省滩溪县杨柳试验点,滩溪 235119) 摘要:在31 年的长期定位试验研究基础上,分析了

5 个不同施肥处理下土壤重金属 Cu、Zn、Cd、Pb 的含 量变化及其分级特征.施肥处理包括 CK、NP、M、MNP (等N) 及HMNP(高氮).结果表明,不同施肥处理 Cu、 Zn 含量差异显著,尤其 NP 处理大幅度提高了土壤中锌的含量.而不同处理对 Cd、Pb 含量影响不大.5 个不同施 肥处理下的 Cu、Zn、Cd、Pb 均以残留态的含量为主,平均占总量为 44.4%、45.6%、35.4%以及 80.3%.不同施肥 处理影响了重金属在各个形态间的分配比例和顺序.Cu、Zn 的各个形态的含量表现为残留态>

碳酸盐结合态>

铁锰 氧化态>

有机态含量>

可交换态,Pb 的各形态分配顺序与 Cu、Zn 完全不同,依次为残留态>

有机态>

可交换态>

酸盐结合态>

铁锰氧化态,不同施肥处理影响到各个形态分配的量.不同施肥处理对 Cd 的形态分配影响较大.在 长期 NP、MNP 施肥下,Cd 的含量高低依次为残留态>

有机态>

铁锰氧化态>

碳酸盐结合态>

可交换态,而在其 它施肥处理下,Cd 的含量高低依次为残留态>

碳酸盐结合态>

有机态>

铁锰氧化态>

可交换态. 关键词:长期定位试验;

重金属形态;

砂姜黑土 中图分类号:X592 文献标识码:A 文章编号:1672?352X (2013)05?0855?05 Effects of long-term localized fertilization on chemical fractionation of heavy metals in Shajiang Black Soil ZHAO Ting1 , SHU Liang-zuo2 ,Yu Hong-mei1 , Cao Li-feng2 , CAO Shuang2 , Zhang Cun-ling3,4 , Zhang Jing-hua4 (1. Geographic and Environmental Science College, Zhejiang Normal University, Jinhua 321004;

2. Huaibei Normal University, Huaibei 235000;

3. Association for Scientific and Technical in Suixi Country, Suixi 235100;

4. Willow Pilot Site in Anhui Suixi City, Suixi 235119) Abstract: The content and chemical fractionations of heavy metals Cu, Zn, Cd and Pb in five different treatments were studied based on the 31-year long-term localized fertilization on Shajiang Black Soil. The fertil- izer treatments included CK, NP, M, MNP (equal nitrogen) and HMNP (high nitrogen). The results showed that the heavy metal contents of Cu, Zn were significantly different under different fertilizer treatments, especially, the NP treatment improved total soil Cu content to an extent of 85%. However, fertilizer treatments had no significant influence on the total contents of Cd and Pb. Among the chemical fractionations, the residual form of Cu, Zn, Cd and Pb was the main fractionation of the heavy metals in the soil in despite of different fertilizations, and ac- counting for 44.4%, 45.6%, 35.4% and 80.3% of their total content respectively. Fertilizer treatments affected the distribution of total heave mental to fractionations and their sequence. The contents of Cu and Zn in different frac- tionations showed the order from high to low as residual form, carbonate form, Fe-Mn oxide form, organic form and exchangeable form. The contents of different Pb showed the sequence as residual form, organic form, ex- changeable form, carbonate form and Fe-Mn oxide form, totally different with those of Cu, Zn. Fertilizer treat- ments affected the amount of different fractions. However, the sequence of different forms of Cd was significantly affected by fertilizer treatments. Under the long-term fertilization of NP、MNP, the sequence of the fractionations of Cd from high to low was residual form, organic form, Fe-Mn oxide form, carbonate form and exchangeable