论文部分内容阅读
以民勤绿洲膜果麻黄为研究对象,对其生境土壤的盐渍化类型、盐渍化程度及其盐分离子的空间分布规律进行了研究。结果表明,膜果麻黄生境土壤盐渍化程度总体以轻度盐渍化及轻度盐渍化以下为主。在垂直方向上土壤盐渍化程度随土层的加深而加重,土壤盐分含量呈明显的底聚分布特征;在水平方向上,膜果麻黄有一定的聚盐效果。在距膜果麻黄树干30 cm处,剖面0~60 cm土层土壤在轻度盐渍化以下,60~100 cm土层土壤轻度盐渍化;在距膜果麻黄树干60 cm处,剖面0~40 cm土层土壤在轻度盐渍化以下,40~100 cm土层土壤轻度盐渍化;在距膜果麻黄树干90 cm处,剖面0~80cm土层土壤在轻度盐渍化以下,80~100 cm土层土壤轻度盐渍化。而在距膜果麻黄树干30 cm处,0~10 cm土层为亚氯盐渍土,10~40 cm土层为亚硫酸盐渍土,40~80 cm土层为亚氯盐渍土,80~100 cm土层为氯盐渍土;在距膜果麻黄树干60 cm和90 cm处,0~60 cm土层为亚氯盐渍土,60~100 cm土层为氯盐渍土。同时各土层土壤阳离子以Na+为主,占到了对应土层阳离子摩尔质量的47.54%~82.57%;各土层土壤阴离子以Cl-为主,占到了对应土层阴离子摩尔质量的58.65%~84.84%,土壤盐分主要是氯化钠。
Taking Minqin oasis, Minqin oasis, as the research object, the salinization types, the degree of salinization and the spatial distribution of its salt ions in its habitat were studied. The results showed that the soil salinization of Ephedra sinica was generally dominated by mild salinization and mild salinization. In the vertical direction, the degree of soil salinization aggravates with the deepening of the soil layer, and the content of soil salinities is obviously distributed at the bottom. In the horizontal direction, the film has a certain salt effect. At the depth of 30 cm, the soil of 0 ~ 60 cm soil layer in the profile was slightly salinized below 60 ° C in the soil layer of 60 cm ~ 100 cm. At the depth of 60 cm, The soil of 0 ~ 40 cm soil layer was mildly salinized in the soil layer of 40 ~ 100 cm soil layer under slight salinization, while the soil layer of 0 ~ 80 cm soil layer in the soil layer of 0 ~ Below the 80 ~ 100 cm soil layer mild salinization. However, at the depth of 30 cm, the 0-10 cm soil layer was sub-saline soil, the soil layer at 10-40 cm was sulfite soil, the soil layer at 40-80 cm was subchlorinated saline soil, The soil layers from 80 cm to 100 cm were chlorophyllous soil. At 60 cm and 90 cm, the 0-60 cm soil layer was subchlorinated saline soil and the 60-100 cm soil layer was saline soil. At the same time, the soil cations in each soil layer are dominated by Na +, accounting for 47.54% -82.57% of the molar mass of the corresponding soil layers. Cl- is the main anion of soil in each soil layer, accounting for 58.65% -84.84 of the molar mass of the corresponding soil anion %, Soil salinity is mainly sodium chloride.