关键词: 中国林蛙, 变态蝌蚪, pH, 盐度, 碱度, 适应性

Abstract: Aiming at the problem of soil salinization in inland river basin, a case study was conducted in the Sangong River catchment of Xinjiang, China. The characteristics and dominant affecting factors of salt accumulation in 0-10 cm and 10-20 cm soil layers in two hydro geological zones, i.e., alluvial-proluvial delta and alluvial plain, were studied in a growth season (from May to October), and the precipitation, evaporation, groundwater table, and irrigation were also taken into account. The soil salt content was obviously lower in alluvial-proluvial delta than in alluvial plain, but its coefficient of variation in the two zones was all higher than 100%, indicating a great variability. The soil salt accumulation in-irrigated landscape in the two zones had a similar decreasing trend, but that in nonirrigated landscape had greater difference, with a decreased soil salinization in alluvial-proluvial delta, and an increased soil salinization in alluvial plain. In alluvial-proluvial delta, the salt contents in 0-10 cm and 10-20 cm soil layers had a close relationship (P<0.01), and there was a clear process of salt leaching by precipitation and irrigation, leading to the decrease of soil salt content. In alluvial plain, the salt accumulation in 0-10 cm soil layer in non-irrigated landscape was promoted by evaporation, and that in 10-20 cm soil layer was co-affected by the salt content in 0-10 cm soil layer and the groundwater table.

Key words: Rana chensinensis, Abnormal tadpole, pH, Salinity, Alkalinity, Adaptability