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干旱区科学  2016, Vol. 8 Issue (6): 861-870    DOI: 10.1007/s40333-016-0056-1
  学术论文 本期目录 | 过刊浏览 | 高级检索 |
Variation of Zn content in soils under different land-use types in the Hetao oasis, Inner Mongolia of China
ZHU Yangchun, ZHAO Xueyong, LIAN Jie, CHEN Min
Naiman Desertification Research Station/Urat Desert-grassland Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
Variation of Zn content in soils under different land-use types in the Hetao oasis, Inner Mongolia of China
ZHU Yangchun, ZHAO Xueyong, LIAN Jie, CHEN Min
Naiman Desertification Research Station/Urat Desert-grassland Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
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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.
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ZHU Yangchun
ZHAO Xueyong
LIAN Jie
CHEN Min
关键词:  OSL dating  sandy deposit  integration interval selection  aeolian activity  Tengger Desert    
Abstract: 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.
收稿日期:  2015-12-23      修回日期:  2016-05-03           出版日期:  2016-12-01      发布日期:  2016-12-01      期的出版日期:  2016-12-01
基金资助: 

This study was financially supported by the Major Science and Technology Special Project of Inner Mongolia (Y439K71001) and the National Natural Science Foundation of China (1103Y511521, 31270501).

通讯作者:  ZHU Yangchun    E-mail:  zhuyangchun1008@sina.com
引用本文:    
ZHU Yangchun, ZHAO Xueyong, LIAN Jie, CHEN Min. Variation of Zn content in soils under different land-use types in the Hetao oasis, Inner Mongolia of China[J]. 干旱区科学, 2016, 8(6): 861-870.
ZHU Yangchun, ZHAO Xueyong, LIAN Jie, CHEN Min. Variation of Zn content in soils under different land-use types in the Hetao oasis, Inner Mongolia of China. Journal of Arid Land, 2016, 8(6): 861-870.
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http://jal.xjegi.com/CN/10.1007/s40333-016-0056-1  或          http://jal.xjegi.com/CN/Y2016/V8/I6/861
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