不同改良措施下砂质土壤肥力的微形态评价——以内蒙古科尔沁沙地为例

发布时间：2018-02-16 21:50

本文关键词： 砂质土壤肥力土壤微形态特征最小数据集内蒙古科尔沁沙地　出处：《土壤》2017年05期 　论文类型：期刊论文

【摘要】：本文以内蒙古通辽市科尔沁左翼后旗巴胡塔镇乌旦塔拉村为试验区,选取13个土壤微形态指标,利用Photoshop、土壤切片图像处理分析系统、Image-pro plus 6.0软件对土壤微形态图像进行处理,采用定性、定量相结合的方法对不同改良处理后的砂质土壤肥力进行评价,在此基础上建立了砂质土壤肥力评价的微形态指标最小数据集(MDS)。得出以下结论:与对照组单元1相比,其他各个单元的土壤结构体、粗骨颗粒等微形态特征变化不显著。单元10(黏土、有机肥、腐殖酸施加量分别为3.00×10~5、3.00×10~4、7.50×10~3 kg/hm~2)中土壤黏粒最多、基质比最大、有机物质频率最高;土壤孔隙状况以及毛管孔隙发育最好的单元分别是单元8和单元13(黏土、有机肥、腐殖酸施加量分别是单元8:1.50×105、3.00×10~4、1.125×10~4 kg/hm~2,单元13:7.50×10~4、3.00×10~4、3.75×103 kg/hm~2)。准则层指标土壤基质、土壤孔隙、有机物质、土壤结构体、粗骨颗粒的权重分别为0.336、0.253、0.203、0.124、0.084。砂质土壤肥力评价的最小数据集包括基质比、基质类型、基质颜色、毛管孔隙占比、孔隙类型、有机物质类型、粗骨颗粒平均粒径7个指标,MDS评价结果与原始评价结果呈显著的线性相关关系,因此实际评价砂质土壤肥力时,可以MDS的7个微形态指标代替原始的13个指标。
[Abstract]:This paper takes Inner Mongolia city of Tongliao Kerqinzuoyihouqi Pakistan Hu town Wudantalacun as the test area, selected 13 soil micromorphology indicators, the use of Photoshop, soil slice image processing and analysis system, Image-pro plus 6 software for micro morphological image processing on soil, using qualitative, quantitative methods to evaluate the different improvement after the treatment of Sandy soil fertility is established based on the micro morphological indexes of sandy soil fertility evaluation of the minimum data set (MDS). Draw the following conclusions: 1 compared with the control group unit, soil structure and various other units, thick bone particles micro morphology did not change significantly. Unit 10 (clay, organic fertilizer, humic acid the amount was 3 * 10~5,3.00 * 10~4,7.50 * 10~3 kg/hm~2) in most soil clay matrix, the maximum ratio of the highest frequency of organic material; soil porosity and capillary porosity in the Good unit units 8 and 13 respectively (clay, organic fertilizer, humic acid amount are units of 8:1.50 * 105,3.00 * 10~4,1.125 * 10~4 * 10~4,3.00 * kg/hm~2, unit 13:7.50 10~4,3.75 * 103 kg/hm~2). The criterion layer index of soil, soil porosity, organic matter, soil structure, the weight of thick bone particles are the minimum data set 0.336,0.253,0.203,0.124,0.084. sandy soil fertility evaluation including matrix ratio, matrix type, color matrix, capillary porosity ratio, pore type, type of organic matter, crude bone particle size 7 indicators, showed a significant linear correlation between MDS evaluation results with the original evaluation results, so the actual evaluation of sandy soil fertility may, 13 indicators 7 MDS micro morphological index instead of the original.

【作者单位】：中国农业大学资源与环境学院;
【基金】：国土资源部公益性行业科研专项(201411009)资助
【分类号】：S158

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