中文摘要：

在土壤理解微量元素 Zn 的地位和分发为管理植物生长并且在干旱、半干旱的区域为农业灌溉系统阻止土壤污染是重要的。在这研究， 195 土壤的一个总数在三种陆地使用类型从五土壤层( 0-20 ， 20-40 ， 40-60 ， 60-80 和 80-100 厘米)取样(荒地，林地和农田)在有黄河的长期的农业授精和灌溉以后，水在 Hetao 绿洲的中间被收集，即 Yongji 灌溉亚绿洲。我们分析了有土壤性质的 Zn 内容和它的关系的垂直、空间的分布决定 Zn 内容的差别是否在土壤侧面存在。结果表明 Zn 的吝啬的内容是 107 mg/kg，比 Hetao 绿洲和比为土壤的中国环境优秀标准的第二等的标准价值(300 mg/kg ) 低的大部分的背景价值(55.7 mg/kg ) 高 1.9 倍什么时候 pH > 7.5。土壤 Zn 内容不是显著地不同的， Zn 内容的变化的系数在五土壤层是不到 50% 。土壤 Zn 内容是类似的从对北部分南部却从增加对在亚绿洲的东方部分西方。土壤 Zn 内容没在三种陆地使用类型之中显著地不同，但是土壤总数氮(TN ) 满足在农业上是显著地更高的管理林地和农田与比在荒地(P < 0.05 ) 。Zn 显著地并且断然与 TN 被相关(F=36.6， P < 0.001 ) 。化肥的使用可以在土壤增加 Zn 的内容，但是泛滥灌溉可以在整个亚绿洲在土壤 Zn 内容的空间分发最小化差别。这研究在干旱、半干旱的区域具有为土壤污染控制和持续陆地使用管理的重要价值。

英文摘要：

Understanding the status and distribution of the micronutrient Zn in soils is important for managing plant growth and preventing soil pollution for agricultural irrigation systems in arid and semi-arid regions. In this study, a total of 195 soil samples from five soil layers （0-20, 20-40, 40-60, 60-80 and 80-100 cm） in the three land-use types （wasteland, forestland and cropland） after long-term agricultural fertilization and irrigation with Yellow River water were collected in the middle of the Hetao oasis, i.e. the Yongji irrigation sub-oasis. We analyzed the vertical and spatial distributions of Zn content and its relationship with soil properties to determine whether differences of Zn content existed in the soil profiles. The results revealed that the mean content of Zn was 107 mg/kg, 1.9 times higher than the background value （55.7 mg/kg） of the Hetao oasis and much lower than the secondary standard value （300 mg/kg） of the Chinese Environmental Quality Standard for Soils when pH〉7.5. Soil Zn contents were not significantly different and the coefficients of variation of Zn contents were less than 50% in the five soil layers. Soil Zn content was similar from southern to northern parts but increased from western to eastern parts in the sub-oasis. Soil Zn contents did not differ significantly among the three land-use types, but soil total nitrogen （TN） contents were significantly higher in the agriculturally managed forestland and cropland than in the wasteland （P〈0.05）. Zn was significantly and positively correlated with TN （F=36.6, P〈0.001）. The use of fertilizers may increase the content of Zn in soils, but flooding irrigation may minimize the differences in the spatial distribution of soil Zn content in the whole sub-oasis. This research is of important value for soil pollution control and sustainable land use management in arid and semi-arid regions.