Abstract:A laboratory simulation experiment was conducted to analyze the improvement effects of 9kinds of shrub litters on biochemical properties of three levels petroleum-contaminated soil (light, 15g/kg; moderate, 30g/kg; severe, 45g/kg) for 120days, by collecting typical wasteland soil in petroleum contaminated areas of northern Shaanxi, and then mixing oil and shrub litters with the soil. The results show that: Litters of Caragana microphylla, Hippophae rhamnoides, Amorpha fruticosa, Rtemisia desterorum and Ligustrum quihoui can significantly contribute to the soil respiration and growth of microbes in three levels of petroleum contaminated soil. Litters of Tamarix chinensis, Caragana microphylla, Hedysarum scoparium and Hedysarum fruticosum can obviously promote the activities of soil alkaline phosphatase and dehydrogenase in three levels of petroleum contaminated soil. Litters of Caragana microphylla, Rtemisia desterorum, Hedysarum fruticosum, Ligustrum quihoui, Hedysarum scoparium, Tamarix chinensis and Amorpha fruticosa can obviously increase the soil organic carbon and available potassium contents in three levels of pollutions. Litters of Sabina procumbens, Hippophae rhamnoides and Hedysarum scoparium can significantly improve the contents of soil available Fe, Mn and Zn in three levels of pollutions. According to comprehensive analysis, litters of Caragana microphylla and Hedysarum fruticosum have significantly improving effects on biochemical properties of three levels of petroleum contaminated soil, and it will be better for Amorpha fruticosa in light pollution, Ligustrum quihoui in moderate pollution, Tamarix chinensis and Amorpha fruticosa in severe pollution than others.
王国保, 刘增文, 时腾飞, 于齐, 张权威. 陕北采油区灌木枯落叶对油污土壤环境的改良效应[J]. 中国环境科学, 2014, 34(3): 688-696.
WANG Guo-Bao, LIU Zeng-Wen, SHI Teng-Fei, YU Qi, ZHANG Quan-Wei. Remediation effects of shrub litters on biochemical properties of petroleum-contaminated soil in oil producing region of northern Shaanxi. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(3): 688-696.