江苏洋口港台田土壤盐分动态变化特征研究

于2006年6月至2007年5月在江苏洋口港围垦区裸露台田上分层采集土样,对土壤盐分动态变化特征及其影响因素进行了研究。结果表明:该试验地0~50 cm土壤pH在8.0以上。土壤盐分随着土层的加深而逐渐增加,0~50 cm各土层的年平均盐分分别为2.30、2.84、4.76、6.19、8.60 g/kg。此外,土壤盐分随着取样时间的延长而逐渐降低。土壤盐分的月动态变化表明,试验地在1—6月属于积盐期,而7—9月属于脱盐期。相关性分析表明,土壤体积质量和机械组成是影响土壤盐分变化的主要因素。

Dynamics of soil salt content in platform fields in Yangkou port of Jiangsu Province

The dynamics of soil salt content and its affecting factors in platform fields in Yangkou port of Jiangsu Province were investigated from June in 2006 to May in 2007. Results showed that soil pH of the tested plot was higher than 8.0 at 0-50 cm depth. The soil salt content increased with the soil depth, and the annual mean soil salt contents were 2.30, 2.84, 4.76, 6.19 and 8.60 g/kg at 0-10 10-20, 20-30, 30-40 and 40-50 cm depths respectively. Meanwhile, the soil salt content decreased with the time. The dynamics of monthly mean soil salt content indicated that soil salt content was increased from February to June, and reduced from July to September. According to the correlations of soil salt content and other soil physical and chemical properties, soil bulk density and soil mechanical composition play important roles in the dynamics of soil salt content in platform fields in Yangkou port of Jiangsu Province.