中文摘要：

2013年9月到次年9月间每隔7天，在沈阳农业大学后山棕壤（简育湿润淋溶土）每间隔10cm观测0～100cm土体内土壤温度，并用土钻采集新鲜土样，立即测定土壤氧化还原电位，室内测定土壤水分含量和土壤DH，研究其动态变化规律。结果表明：①9—11月，各土层Eh均在300～400mv范围内呈平稳状态；12月到次年3月，土壤处于冻融时期，各土层Eh明显升高；4-6月干湿交替时期，各土层Eh呈波动变化趋势；与往年不同，7-8月沈阳地区降水量明显减少，土壤Eh呈现先升高后趋于平稳的变化趋势，且随着土壤深度的增加而减小。其中有机质较多的土壤表层Eh变化幅度较小。②9-11月以及次年4-8月间，土壤Eh变化主要受含水量影响，二者呈负相关关系（P〈0．05）。12月到次年3月间，二者呈现正相关关系（尸〈O．05）。温度较低、水分含量较多的冻融时期，土壤Eh变化趋势为先升高后降低，温度较高、水分较多的干湿交替期，土壤Eh波动变化则尤为明显。③非冻融时期，各层土壤Eh受pH影响不显著。冻融时期，各层土壤Eh受土壤pH影响较大，且二者呈正相关关系（P〈0．05）。

英文摘要：

From September in 2013 to September in 2014, the temperature of brown soil in 0-100 cm （interval 10 cm） layer was measured in situ. Besides, fresh soil samples were collected in 0-100 cm （interval 10 cm） layer from a brown soil profile using soil drilling and then soil Eh, pH and moisture were measured. The results showed that： 1） From September in 2013 to November in 2013, soil Eh were stable in the range of 300--400 mV. But the soil Eh increased significantly and then decreased during freeze-thaw period from December to March in next year. During the alternation period of wetting and drying from April to June, soil Eh was in a fluctuating trend. Different from other years, there is little rainfall from July to August in 2014. Then Eh increased with the decrease of rainfall, but decreased with the increase in soil depth. In addition, surface soil Eh is smaller amplitude due to more organic matter. 2） From September to November in 2013 and from April to August in 2014, soil moisture content was negatively correlated with Eh （P〈0.05）. From December in 2013 to March in 2004, soil moisture was positively correlated with Eh significantly （P〈0.05）. 3） During freeze-thaw period, the soil pH was positively correlated with Eh significantly （P〈0.05）.