鄂尔多斯市典型能源开发地区土壤质量调查研究

发布时间：2018-06-15 21:21

本文选题：土地利用 + 土壤质量　；参考：《内蒙古农业大学》2015年硕士论文

【摘要】：内蒙古鄂尔多斯市地域广阔,资源丰富,土地利用方式多样,具有典型的能源开发区和传统农耕区。本文对鄂尔多斯市能源开发重点区的伊金霍洛旗和达拉特旗2012年-2014年土壤质量野外监测数据进行系统分析,探讨不同土地利用方式下土壤养分状况和土壤质量变化情况。1、两个旗县2012年土壤质量指标显示：土壤有机质、土壤全氮量、土壤全磷量在0-30cm均呈现随土壤剖面深度增加含量逐步降低的趋势,土壤全钾量在0-30cm呈现随土壤剖面深度增加保持相对稳定的趋势；土壤含盐量均值为0.19-0.36g/kg, PH值在8.57-9.26,整体呈现弱碱性。2、土壤有机质、土壤全氮量、土壤全磷量在不同土地利用方式下差异显著(p0.05),土壤全钾量在不同土地利用方式下差异不显著(p0.05)；两个旗县土壤有机质含量、全氮含量、全磷含量均表现为“稍缺”“缺”“极缺”的水平,全钾含量均处于“稍丰”的水平。3、2012年伊金霍洛旗各土地利用方式间,土壤有机质、全氮、全钾、含盐量指标的变异系数在天然牧草地利用方式下最大,在水浇耕地、旱作耕地利用方式下变异系数较小；2013、2014年水浇耕地和早作耕地的有机质、全效氮磷钾含量均有稳步升高的趋势,其它各种土地利用方式下土壤质量指标差距较小；2012年达拉特旗水浇耕地的各项土壤质量指标的变异系数均大于天然牧草地；2013、2014年水浇耕地土壤养分含量有一定提高,土壤质量各指标的变异系数以pH的变异系数最小。
[Abstract]:Erdos city in Inner Mongolia has a vast area, rich resources and various land use modes. It has typical energy development zones and traditional farming areas. In this paper, the field monitoring data of soil quality in the key areas of energy development in Erdos from 2012 to 2014 are systematically analyzed. The soil nutrient status and soil quality change under different land use patterns were discussed. The soil quality indexes of two flag counties in 2012 showed that: soil organic matter, soil total nitrogen content, Soil total phosphorus content decreased gradually with the increase of soil profile depth in 0-30cm, and soil total potassium content in 0-30cm showed a relatively stable trend with the increase of soil profile depth. The average value of soil salt content was 0.19-0.36 g / kg, the PH value was 8.57-9.26, the soil organic matter, soil total nitrogen and total phosphorus content were significantly different under different land use patterns, but the total potassium content was not significantly different under different land use patterns. Soil organic matter content, total nitrogen content and total phosphorus content in the two counties were all at the level of "slightly deficient" and "extremely deficient", and the total potassium content was at the level of "slightly abundant". In 2012, the soil organic matter was found among the different land use patterns in Yijinhuoluo Banner. The coefficient of variation of total nitrogen, total potassium and salt content was the highest in the natural pasture land use mode, and the coefficient of variation was smaller in irrigated cultivated land and dry cultivated land in 2013.The organic matter of water-irrigated cultivated land and early cultivated land in 2014 was lower than that of dry cultivated land. The content of total nitrogen, phosphorus and potassium increased steadily, and the difference of soil quality index was small under other land use methods, and the coefficient of variation of soil quality indexes in 2012 was higher than that in natural forage land. In 2013, the soil nutrient content of irrigated cultivated land increased to some extent in 2014, and the coefficient of variation of soil quality was the least in pH.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S159.2

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