荒漠绿洲过渡带林地开垦对土壤有效态微量元素的影响
发布时间：2019-08-13 10:22
【摘要】：选择荒漠绿洲过渡带的林地开垦区为研究对象,运用地统计学和Arc Gis空间分析工具相结合的方法,研究了林地开垦后土壤中有效态Fe、Cu、Zn和Mn含量的空间变异特征和丰缺状况。结果表明:林地开垦后有效态Mn显著缺乏(P0.05),平均值为4.24 mg·kg~(-1),低于临界值的土壤占土壤总数的32.25%,有效态Fe和Ze次之,分别有21.82%和29.36%的样品低于临界值,4种微量元素空间变异强度均25%,呈较明显的空间变异性;半方差函数分析中,有效态Fe块金值最大,有效态Mn变程最小,4种有效态微量元素块金值与基台值的比值均25%,表明4种有效态微量元素空间依赖性均较强;在空间结构中,4种有效态微量元素呈明显的片状和斑块状分布,有效态Cu主要分布于研究区西南和西北部,有效态Zn和Fe主要分布于中部,有效态Mn呈东西方向对称分布且东部含量大于西部;在有效性评价中,单项指数(Ei)以有效态Mn最高,达2.83,综合指数(Ec)以有效态Fe最高,达1.27,有效态Cu的Ei值和Ec值均较低。
[Abstract]:The forest land reclamation area in the transitional zone of desert oasis was selected as the research object. The spatial variation characteristics and abundance and deficiency of available Fe,Cu,Zn and Mn contents in soil after forest land reclamation were studied by means of geostatistics and Arc Gis spatial analysis tools. The results showed that the available Mn was significantly deficient after forest land reclamation (P 0.05), the average value was 4.24 mg kg~ (- 1), the soil below the critical value accounted for 32.25% of the total soil, the available Fe and Ze were the second, 21.82% and 29.36% of the samples were lower than the critical value, respectively, and the intensity of spatial variation of the four trace elements was 25%, showing obvious spatial variability. In the analysis of semi-variance function, the effective state Fe block gold value is the largest, the effective state Mn variable range is the smallest, and the ratio of the gold value of the four effective trace elements to the base value is 25%, which indicates that the spatial dependence of the four effective trace elements is strong. In the spatial structure, four kinds of effective trace elements show obvious flake and patchy distribution. The effective Cu is mainly distributed in the southwest and northwest of the study area, the available Zn and Fe are mainly distributed in the middle, the available Mn is symmetrical in the east-west direction and the content in the east is higher than that in the west. In the validity evaluation, the effective state Mn is the highest in the single index (Ei), and the effective state Fe is the highest in the comprehensive index (Ec), which is 1.27. the E value and EC value of the effective state Cu are lower.
【作者单位】： 新疆师范大学地理科学与旅游学院;新疆维吾尔自治区重点实验室新疆干旱区湖泊环境与资源实验室;
【基金】：国家自然科学基金(41261046) 新疆师范大学地理学博士点支撑学科开放课题基金项目(XJNU-DL-201501)
【分类号】：S714.2
本文编号：2526061
[Abstract]:The forest land reclamation area in the transitional zone of desert oasis was selected as the research object. The spatial variation characteristics and abundance and deficiency of available Fe,Cu,Zn and Mn contents in soil after forest land reclamation were studied by means of geostatistics and Arc Gis spatial analysis tools. The results showed that the available Mn was significantly deficient after forest land reclamation (P 0.05), the average value was 4.24 mg kg~ (- 1), the soil below the critical value accounted for 32.25% of the total soil, the available Fe and Ze were the second, 21.82% and 29.36% of the samples were lower than the critical value, respectively, and the intensity of spatial variation of the four trace elements was 25%, showing obvious spatial variability. In the analysis of semi-variance function, the effective state Fe block gold value is the largest, the effective state Mn variable range is the smallest, and the ratio of the gold value of the four effective trace elements to the base value is 25%, which indicates that the spatial dependence of the four effective trace elements is strong. In the spatial structure, four kinds of effective trace elements show obvious flake and patchy distribution. The effective Cu is mainly distributed in the southwest and northwest of the study area, the available Zn and Fe are mainly distributed in the middle, the available Mn is symmetrical in the east-west direction and the content in the east is higher than that in the west. In the validity evaluation, the effective state Mn is the highest in the single index (Ei), and the effective state Fe is the highest in the comprehensive index (Ec), which is 1.27. the E value and EC value of the effective state Cu are lower.
【作者单位】： 新疆师范大学地理科学与旅游学院;新疆维吾尔自治区重点实验室新疆干旱区湖泊环境与资源实验室;
【基金】：国家自然科学基金(41261046) 新疆师范大学地理学博士点支撑学科开放课题基金项目(XJNU-DL-201501)
【分类号】：S714.2
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