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当前位置: 首页 > 文章 > 苏打碱土盐分水平冲洗模拟研究 水土保持学报 2009,23 (4) 109-112+117
Position: Home > Articles > Leaching Salts of Sodic Soil by Horizontal Surface Flushing:a Simulation Experiment Journal of Soil and Water Conservation 2009,23 (4) 109-112+117

苏打碱土盐分水平冲洗模拟研究

作  者：
迟春明;王志春
单  位：
中国科学院东北地理与农业生态研究所;中国科学院研究生院
关键词：
苏打碱土;水平冲洗;应用水量;可溶性盐总量;冲洗效率
摘  要：
通过模拟实验对苏打碱土盐分水平冲洗的效果进行了研究,分析了磷石膏对盐分冲洗效果的影响,探讨了应用水量与盐分冲洗总量和盐分冲洗效率的关系,并对一次性冲洗和少量多次性冲洗两种方案的盐分冲洗效果进行了比较。结果表明:水平冲洗能够有效排出土壤盐分,显著降低土壤盐度和碱度;3次冲洗后,1 L,2 L,3 L,4L,5 L应用水量分别使对照处理的土壤盐度从3.39 dS/m降低到了1.83,1.73,1.39,1.26,1.13 dS/m,使土壤碱度从98.27(mmolc/L)1/2下降到了15.33,19.14,17.96,15.73,15.04(mmolc/L)1/2;与对照相比,磷石膏使土壤盐度略有提高,但显著降低了土壤碱度;盐分冲洗总量随应用水量的增加而提高;盐分冲洗效率与应用水量间呈幂函数递减关系;在应用水量相同情况下,一次性冲洗和少量多次性冲洗两种方法的碱土改良效果无显著差异。
译  名：
Leaching Salts of Sodic Soil by Horizontal Surface Flushing:a Simulation Experiment
作  者：
CHI Chun-ming1,2,WANG Zhi-chun1(1.Northeast Institute of Geography and Agroecology,CAS,Changchun,Jilin 130012;2.Graduate University of the Chinese Academy of Sciences,Beijing 100049)
关键词：
sodic soil;horizontal surface flushing;drainage water volumes;total soluble salts;effectiveness of salts leaching
摘  要：
On the bases of a simulation experiment,impacts of horizontal surface flushing on leaching salts of sodic soil were study,the effect of phosphogypsum in horizontal surface flushing was observed,influences of irrigation water volume on total soluble salts leached out of sodic soil and efficiencies of water leaching salts were analyzed,and the differences of efficacy between leaching one time and leaching several times with same irrigation water volume in the two methods were assessed.Results showed: the method of horizontal surface flushing effectively leached salts leading to significant declines in salinity and sodicity of sodic soil;flushed three times,salinity and sodicity of control soil declined from 3.39 dS/m and 98.27(mmolc/L)1/2 to 1.83,1.73,1.39,1.26 and 1.13 dS/m and to 15.33,19.14,17.96,15.73 and 15.04(mmolc/L)1/2 for the irrigation water volume of 1 L,2 L,3 L,4 L and 5 L,respectively;there were no significant differences between salinity of control soils and sodic soils treated with phosphogypsum,but the sodicity of sodic soils treated with phosphogypsum were significant less than those of control soils;total soluble salts leached out of soils increased with the increment of irrigation water volumes;the efficiencies of water leaching salts decreased with the increase of irrigation water volumes and the relationships between them flow power functions;there were no significant differences between leaching one time and leaching several times when irrigation water volumes were same in these two methods.

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