中文摘要：

采用改进的BCR连续提取法,对沈阳农业大学棕壤肥料长期定位试验地31年不同施肥处理土壤铜和锌含量变化及其空间变异规律进行研究。结果表明：与试验前相比,耕层（0-20cm）土壤各处理水溶态铜、弱酸溶态铜和残渣态铜含量都有不同程度的减少,可还原态铜和可氧化态铜含量在化肥区有所降低,在有机肥区有所增加;残渣态锌含量明显减少,其他形态锌含量有不同程度的增加。耕层各形态铜分布趋势因处理不同而不同,锌以残渣态为主。在空间分布上,2种元素弱酸溶态、可还原态和可氧化态含量都是随土层的加深而减少。可氧化态铜与有效态铜关系最密切;可还原态锌对有效态锌的贡献最大。

英文摘要：

The BCR continuous extraction was used to research the soil Cu and Zn contents change and its spatial variability after 31-year fertilization treatments on Shenyang Agricultural University brown earth long-term localization experimental field.The experimental results showed that compared with the baseline,the contents of the water soluble Cu,the weak acid soluble Cu and residual Cu decreased,the contents of oxidizable Cu and reducible Cu decreased in fertilizer area while in organic fertilizer area the trend was opposite;except residual Zn,the contents of other forms increased.The distributions of Cu forms were different in different treatments in topsoil（0-20 cm）,residual Zn was the main forms.As for the spatial distribution,with the deepen of soil,the contents of the weak acid soluble,oxidizable and reducible Cu,Zn reduced.Reducible Cu gave the greatest contribution to available Cu and oxidizable Zn gave the greatest contribution to available Zn.