This paper takes Poa annua L. as the research object and studies the law of physiological and ecological stress of 1-Chloronaphthalene (CN-1) and Octachloronaphthalene (CN-75) by using various physiological and biochemical indexes of Poa annua L. cultivated with soil under the stress of CN-1 and CN-75 of different concentrations. According to the research, the chlorophyll a and b first increase and then decrease with the increase of the concentration of CN-1, and continue to decrease with the increase of CN-75; Soluble sugar and soluble protein in plants decrease first and then increase with the increase of CN-1, and continue to decrease with the increase of CN-75; MDA in plants increases first and then decreases with the increase of the concentration of CN-1 and CN-75. The proline content in plants also increases first and then decreases with the increase of concentration of CN-1 and CN-75. Based on the research, it can be seen that the tolerance of the plant to CN-75 is not good as to CN-1.

采用高效液相色谱法对沈阳市地表土壤中的多环芳烃(Polycyclic Aromatic Hydrocarbons,PAHs)进行了定量分析,研究了沈阳市地表土壤中PAHs在不同功能区的含量及分布特征.结果表明:从土壤PAHs总量来看,居民区最低,其次是商业区,交通干道、文教区和公园排在商业区之后,工业区的PAHs总量最多;从PAHs的空间差异来看,靠近工业区以及机动车车流量较大的地区PAHs含量较高,靠近文教区和居住区的地区PAHs含量较低;从PAHs种类来看,所有功能区样品中PAHs的组分分布状况较为一致,以四环PAHs含量最多,其次是五环PAHs和三环PAHs;参考美国EPA沉积物PAHs质量标准和治理标准,沈阳市内五区PAHs总量超过质量标准的功能区有工业区、交通干道(4个采样点,占比36.3％)、文教区(3个采样点,占比75％)和公园区(4个采样点,占比40％),超过治理标准的功能区有工业区,公园区(1个采样点,占比10％),文教区(1个采样点,25％).