【摘要】 黄潮土和砂姜黑土面积占皖北平原总面积的87%。砂姜黑土内部含有钙质结核,严重影响土壤性质进而降低作物产量。从土壤理化性质、土壤水力学参数和土壤水分等方面探讨两种土壤差异性,并结合水文气象因素分析影响黄潮土和砂姜黑土土壤水分变异的驱动因素。结果表明:黄潮土和砂姜黑土的pH值和密度存在显著差异,全氮、全磷、碱解氮含量差异不大;黄潮土0～50 cm的有效持水量显著大于砂姜黑土,保水性更好。黄潮土土壤含水率随深度增加逐渐降低,砂姜黑土土壤含水率随深度增加逐渐增大。影响黄潮土土壤含水率变化的主要驱动因素是地下水埋深和降水量;影响砂姜黑土土壤含水率变化的主要驱动因素是地温、地下水埋深和相对湿度。该研究可为进一步改善砂姜黑土土壤性质、提高作物产量提供参考。更多还原

【Abstract】 The area of yellow tide soil(YTS) and lime concretion black soil(LCBS) accounts for 87% of the total area of the Northern Anhui Plain, and the LCBS contains calcareous nodules inside, which seriously affect the soil properties and thus reduce the yield. Therefore, in the study, the differences between the two soils were investigated in terms of soil physical and chemical properties, soil hydraulics parameters and soil moisture, and the driving factors affecting the variability of soil moisture in YTS and LCBS were analyzed together with hydro-meteorological factors. The results show that the pH and bulk weight of YTS and LCBS are significantly different, and the contents of total nitrogen, total phosphorus and alkaline solution nitrogen are not significantly different; the effective water holding capacity of YTS from 0 to 50 cm is significantly larger than that of LCBS, and the water retention is better. Soil water of YTS gradually decreases with increasing depth; soil water of LCBS gradually increases with increasing depth. The main drivers affecting soil water variation in YTS are groundwater depth of burial and rainfall; the main drivers affecting soil water variation in LCBS are ground temperature, groundwater depth of burial and relative humidity. This study can provide a reference for improving the soil properties of LCBS and enhancing crop yield.更多还原