Department of Agricultural Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea.
J Microbiol Biotechnol. 2011 Apr;21(4):341-6.
To study the effects of salinity-sodicity on bacterial population and enzyme activities, soil samples were collected from the Bay of Yellow Sea, Incheon, South Korea. In the soils nearest to the coastline, pH, electrical conductivity (ECe), sodium adsorption ratio (SAR), and exchangeable sodium percentage (ESP) were greater than the criteria of salinesodic soil, and soils collected from sites 1.5-2 km away from the coastline were not substantially affected by the intrusion and spray of seawater. Halotolerant bacteria showed similar trends, whereas non-tolerant bacteria and enzymatic activities had opposite trends. Significant positive correlations were found between EC, exchangeable Na+, and pH with SAR and ESP. In contrast, ECe, SAR, ESP, and exchangeable Na+ exhibited significant negative correlations with bacterial populations and enzyme activities. The results of this study indicate that the soil chemical variables related with salinity-sodicity are significantly related with the sampling distance from the coastline and are the key stress factors, which greatly affect microbial and biochemical properties.
为了研究盐分-碱度对细菌种群和酶活性的影响，从韩国仁川的黄海湾采集了土壤样本。在最靠近海岸线的土壤中，pH 值、电导率（ECe）、钠吸附比（SAR）和可交换钠百分比（ESP）都大于盐碱性土壤的标准，而距离海岸线 1.5-2 公里处采集的土壤则没有受到海水入侵和喷洒的实质性影响。耐盐细菌表现出相似的趋势，而非耐受细菌和酶活性则呈现相反的趋势。EC、可交换 Na+ 和 pH 值与 SAR 和 ESP 之间存在显著的正相关关系。相比之下，ECe、SAR、ESP 和可交换 Na+ 与细菌种群和酶活性呈显著负相关。本研究结果表明，与盐分-碱度相关的土壤化学变量与距海岸线的采样距离密切相关，是影响微生物和生化特性的关键胁迫因素。
