贵州省花溪区耕地土壤硒元素分布特征及富硒资源评价

随着我国经济的快速发展，大气污染问题日益严重，旅游城市的空气质量问题也备受关注。本文基于2018年30座热门旅游城市的气温和空气质量数据，从气象条件的角度出发，研究了气温与空气质量之间的关系。采用函数型数据描述性分析的方法对空气质量和气温变化特征进行分析，用函数型回归分析研究气温对空气质量的影响。结果显示：函数型线性模型拟合优度R2=0.898 1,F=11.8212大于临界值2.385 9,函数型检验统计量F=8.723 3大于α=0.05水平下的临界值1.7058，说明气温与空气质量的函数型线性关系显著；气温对空气质量呈谐波正负影响交替出现，这与空气质量平均变化相似，在实际生活中是合理的。

Distribution Characteristics of Soil Selenium and Evaluation of Selenium-rich Resources of Huaxi District, Guizhou Province

By study the results of the cultivated land quality geochemical investigation and evaluation project in Huaxi district of Guizhou province, extensive collection of geology, physical geography, soil types, land use types and other data in Huaxi area, the distribution characteristics of selenium in this area were com-prehensively analyzed, the geochemical grade of selenium in the whole region was evaluated by geochemical indexes. The results show that: The average content of selenium was 0.71 mg/kg, the distribution of selenium is closely related to stratum, land use type and soil type, the cultivated land area rich in selenium is 410 466 mu, accounting for 86.65% of the cultivated land area in Tibet, Cultivated land rich in selenium is rich in resources. The research results can provide important data for the development of characteristic cultivated land rich in selenium, it is applied to the optimization of the agricultural industry structure and the improvement of the quality of agricultural products in the region, to drive local economic development, we will help implement the poverty alleviation and rural revitalization strategies in the region.