Dynamics of the soil water and solute in the sodic saline soil in the Songnen Plain, China
Dynamics of the soil water and solute in the sodic saline soil in the Songnen Plain, China
复制标题
松嫩平原钠盐渍土土壤水和溶质动态
DOI：
10.1007/s12665-009-0079-4
复制
发表时间：
2009-12-01
影响因子：
2.8
通讯作者：
Yang, Zhifeng
中科院分区：
文献类型：
--
作者：
Liu, Qiang;Cui, Baoshan;Yang, Zhifeng
通过在松嫩平原苏打盐渍土区的田间试验，探讨了2004年生长季浅层地下水对土壤水分和溶质的影响。结果表明，受强烈蒸发需求的影响，土壤水分随盐分向上层运移。分层土壤水分平衡模型(LSWB模型)表明，地下水与土壤上层水交换的比例为11.7：1，地下水排泄量为53.86亿mm，而土壤上层补给量仅为5.04亿mm，表明地下水可能通过毛管上升向土壤上层排放，影响土壤盐渍化。7月至10月中旬的盐分实测值表明，30 cm土层土壤溶质受气候条件影响较大。由于田间饱和导水率较低，盐分主要积聚在50~70 cm土层中，很少向深层淋溶。土壤含盐量主要受地下100 cm以下地下水控制，随着地下水位的降低，含盐量逐渐降低。受浅层地下水和冻融作用的影响，中国松嫩平原苏打盐碱地土壤盐渍化机理有待进一步研究。
According to the field experiment in the sodic saline soil region in the Songnen Plain, the dynamics of the soil water and solute affected by the shallow groundwater were explored during the growing season in 2004. The results presented that, influenced by the strongly evaporative demand, the soil water tended to transport to the upper soil layer with salt. The layered soil water balance model (LSWB model) revealed that the ratio of the water exchange between the groundwater and upper layer of the soil was 11.7:1. The groundwater discharge was 53.86 mm, but the groundwater recharge from the upper layer of soil was only 5.04 mm from 11 July to 06 September, which indicated that the groundwater could discharge to upper layer of soil and influence the soil salinization through capillary rise. The observed values of the salt content from July to mid-October presented that the soil solute was more changeable influenced by the climatic condition at 30 cm depth. As the field saturated hydraulic conductivity was low, the salts mainly accumulated in about 50–70 cm depth soil layer and hardly leached into deeper soil layer. Furthermore, the salt content was mainly controlled by the groundwater in the subsoil below 100 cm depth, the salt content decreased with the groundwater level receding. As influenced by the shallow groundwater and freeze-thaw action, further studies should be performed on the mechanism of soil salinization in the sodic saline soil region in the Songnen Plain of China.