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引用本文:樊丽琴,沈婧丽,王旭.微咸水-改良材料协同调控对碱化土壤水盐运移的影响[J].灌溉排水学报,0,():-.
FAN Li-qin,SHEN Jingli,WANG Xu.微咸水-改良材料协同调控对碱化土壤水盐运移的影响[J].灌溉排水学报,0,():-.
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微咸水-改良材料协同调控对碱化土壤水盐运移的影响
樊丽琴, 沈婧丽, 王旭
宁夏农林科学院农业资源与环境研究所 宁夏 银川 750002
摘要:
微咸水灌溉与改良材料协同调控是解决水资源短缺背景下碱化土壤改良的一条有效途径。通过一维垂直土柱入渗试验开展了不同微咸水淋洗结合不同改良材料对碱化土壤水盐运移的影响研究,结果表明:(1)水分入渗速率和累积入渗水量表现为“磷石膏”处理最大,“硫酸亚铁+柠檬酸”处理次之,随着淋洗水矿化度的增加,累积入渗水量和湿润锋推进深度呈增加趋势,但各处理之间的差异变小。(2)与其他处理相比,“磷石膏”和“硫酸亚铁+柠檬酸”两个处理在1.2g/L矿化度水淋洗下可显著降低0-40 cm土层土壤全盐含量,分别降低了31.70%和30.69%,但在3.6g/L矿化度水淋洗下则会增加上层土壤盐分。(3)“磷石膏”处理显著降低了0-30 cm土层土壤Na+、Cl-、HCO3-和CO32-等有害盐分离子含量,但随着淋洗水矿化度的增加,Na+和Cl-淋洗效果降低;在0-10 cm土层,“柠檬酸+硫酸亚铁”处理显著降低了较低矿化度水(1.2g/L和2.4g/L)淋洗下的CO32-含量以及较高矿化度水(3.6 g/L)淋洗下的HCO3-含量。(4)“柠檬酸+磷酸亚铁”处理和“石膏”处理在降低0-10 cm土层土壤pH值方面效果相当,但“石膏”处理在降低0-30 cm土层尤其是10-20 cm土层土壤pH值方面效果更显著。
关键词:  微咸水;改良材料;碱化土壤;土壤盐分离子;土壤pH值
DOI:
分类号:S157.4
基金项目:宁夏自然科学(2021AAC03268),宁夏农业高质量发展和生态保护科技创新示范课题(NGSB-2021-11-03 ),国家自然科学(31960274),农业基础性长期性科技工作观测监测(NAES091AE18)
Effect of Synergistic Regulation with Brackish Water and Improvement Material on Water and Salt Transport in Alkaline Soil
FAN Li-qin, SHEN Jingli, WANG Xu
Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry Sciences
Abstract:
The Coordinated Regulation on brackish water irrigation and improved materials is an effective way to improve alkaline soil under the background of water shortage. Through the one-dimensional vertical soil column infiltration test, the effect of combined different brackish water and different improvement material on water and salt transport in alkaline soil was studied. The results showed that: (1) the water infiltration rate and the cumulative infiltration water amount is the largest in the "phosphogypsum" treatment, followed by the "ferrous sulfate + citric acid" treatment. The differences between treatments became smaller with the salinity increase of leaching water (2) under the leaching water with 1.2 g? L-1 salinity, compared with the control, the total salt content in 0-40 cm soil layer of "phosphogypsum" and "ferrous sulfate + citric acid" treatment was significantly decreased by 31.70% and 30.69%, respectively, but under the leaching water with 3.6 g? L-1 salinity, the two treatment would increase salinity of the upper soil. (3)The content of Na+ , Cl-, HCO3-and CO32- in 0-30 cm soil layer of“phosphogypsum”treatment was significantly decreased, but the leaching effect of Na+ and Cl- decreased with the salinity increase of leaching water. In 0-10 cm soil layer, the "ferrous sulfate + citric acid" treatment significantly reduced CO32- content under the leaching with the lower salinity water(1.2 g? L-1 and 2.4 g? L-1) and HCO3- content under the leaching with the higher salinity water(3.6 g? L-1). (4) the "ferrous sulfate + citric acid" treatment had the same effect on decreasing soil pH value of 0-10 cm soil layer with the "phosphogypsum" treatment, but the latter had a more obvious effect on decreasing soil pH value of 0-30 cm soil layer, especially 10-20 cm soil layer.
Key words:  brackish water; improved materials; alkalized soil; soil salt ions; soil pH value