| Desert oasis ecotone of forest land tillage effects on soil trace elements |
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| DOI：10.7606/j.issn.1000-7601.2016.04.19 |
| Key Words: soil trace element desert oasis ecotone reclamation of forest land spatial variability effectiveness evaluation |
| Author Name | Affiliation | | MA Xiao-fei | College of Geography and Tourism, Xinjiang Normal University, Urumqi, Xinjiang 830054, China
Key Laboratory of lake environment and Resources in arid area of Xinjiang, Urumqi, Xinjiang 830054, China | | CHU Xin-zheng | College of Geography and Tourism, Xinjiang Normal University, Urumqi, Xinjiang 830054, China
Key Laboratory of lake environment and Resources in arid area of Xinjiang, Urumqi, Xinjiang 830054, China |
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| Abstract: |
| Selection of desert oasis ecotone of forest land reclamation area as the research object, using the method of statistical tools and ArcGis spatial analysis of combining research, spatial variability of woodland effective state in soil after reclamation of Fe, Cu, Zn and Mn content and the condition of abundance or deficiency. The results showed that: After the land reclamation, the available Mn was obviously insufficient (P＜0.05). The average content was 4.24 mg·kg-1. Soil with the Mn content which was lower than the critical value occupied 32.25% of all the soil. Insufficiency degrees of available Fe and available Ze ranked the second place. Fe contents in 21.82% of samples and Ze contents in 29.36% of samples were lower than critical values. The spatial variation intensities of 4 microelements exceeded 25%, while these microelements showed obvious spatial variability； Analysis of semi variance function, nugget value maximum available Fe, available Mn variable range minimum, 4 kinds of available trace elements nugget value base table value <25%, showed that 4 kinds of available trace elements spatial dependence are strong; In the space structure, sheet and patchy distribution obviously 4 available trace elements are, available Cu mainly distributed in the study area in southwest and northwest, available Zn and Fe were mainly distributed in the middle available Mn in east-west direction, symmetrically distributed and Eastern content greater than western; According to availability evaluation results, available Mn had the highest single index (Ei), which reached up to 2.83; available Fe had the highest comprehensive index (Ec) which reached up to 1.27; and Ei and Ec values of available Cu were relatively low. |
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