平凉市耕地土壤有效态微量元素丰缺评价及影响因素研究

研究旨在系统阐明区域内耕地土壤有效态微量元素的丰缺状况，探究微量元素间的相关性及其影响因素，为平凉市推进测土配方施肥、提高肥料利用率、促进土壤改良与地力提升提供科学依据。以Cu、Zn、Fe、Mn、B、Mo和S为主要研究对象，系统评价平凉市耕地土壤有效态微量元素丰缺状况。采用统计学方法，对微量元素及其影响因素进行相关分析和回归分析。统计结果表明，平凉市耕地土壤有效Cu、Zn、Fe、Mn、B、Mo、S平均含量分别为1.04、0.92、13.18、11.03、0.51、0.11、15.11 mg/kg。有效S含量在空间上为强变异，其余元素含量均属于中等程度变异。评价结果显示，不同区域耕地土壤有效Cu、Zn含量丰缺水平为低—中等，有效Fe、Mn为低—高等，有效Mo为较低—低等，有效B、S为极低—较低等；不同土类土壤有效Cu含量丰缺水平为低—中等，有效Zn、Fe、Mn为低—高等，有效B为较低—低等，有效Mo为较低—中等，有效S为极低等。土壤pH、有机质和有效态微量元素之间存在一定的影响关系。总体而言，平凉市耕地土壤整体缺乏有效B、Mo、S，且有效S为极缺乏，有效Cu、Zn、Fe、Mn普遍处于适中...

Available Trace Elements in Cultivated Soil in Pingliang City: Abundance and Deficiency Evaluation and Influencing Factors

The study aims to clarify the abundance and deficiency of available trace elements in cultivated soil systematically in the study region, and explore the correlation between trace elements and their influencing factors, in order to provide a scientific basis for soil testing for formula fertilization, and improve fertilizer utilization rate and soil fertility in Pingliang City. The authors used Cu, Zn, Fe, Mn, B, Mo and S as the main research objects, and evaluated the abundance and deficiency of available trace elements in cultivated soil in Pingliang City. The correlation analysis and regression analysis of trace elements and their influencing factors were conducted by statistical method. The statistical results showed that the average content of available Cu, Zn, Fe, Mn, B, Mo and S was 1.04, 0.92, 13.18, 11.03, 0.51, 0.11 and 15.11 mg/kg, respectively. The content of available S had strong spatial variation, while the content of other elements were moderately variable. The results showed that the abundance and deficiency level of available Cu and Zn in cultivated soil in different regions were from low to medium, that of available Fe and Mn were from low to high, that of available Mo was from relatively low to low, and that of available B and S were from very low to relatively low. The content of available Cu in different soil types was from low to medium, that of available Zn, Fe and Mn were from low to high, that of available B was from relatively low to low, that of available Mo was from relatively low to medium, and that of available S was extremely low. There were certain correlations among soil pH, organic matter and available trace elements. In general, the cultivated soil in Pingliang City was deficient in available B, Mo and S, and available S was extremely deficient. Meanwhile, the available Cu, Zn, Fe and Mn were generally above moderate level. Therefore, according to the evaluation results and the correlation characteristics of soil pH, organic matter and available trace elements, it is suggested to take measures such as reasonable application of organic fertilizer, appropriate adjustment of soil pH, appropriate supplementation of B and Mo fertilizers according to local conditions, more application of S fertilizer, and carrying out experiments and demonstration of trace element fertilizer efficiency, to achieve the high-yield and high-quality crop production and ensure food security.