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磁化水灌溉条件下黄河三角洲刺槐林地土壤盐分时空分布特征及变化规律
阎腾飞1, 刘秀梅2,3, 刘合满1, 王华田2, 洪弦1, 贺闯1, 王壮壮1
1.信阳农林学院, 河南 信阳 464000;2.山东农业大学 黄河下游森林培育国家林业局重点实验室, 山东 泰安 271000;3.上海市环境学校, 上海 200135
摘要:
[目的] 探明磁化水灌溉条件下土壤盐分含量时空分布特征及变化规律,为滨海盐碱地磁化水灌溉技术提供理论依据。[方法] 以黄河三角洲东营市河口区新营造刺槐人工林地为研究对象,分析了淡水灌溉(FW)、磁化淡水灌溉(MFW)、地下浅表层微咸水灌溉(GW)和磁化地下浅表层微咸水灌溉(MGW)4种措施下土壤盐分含量的时空分布特征及变化规律。[结果] 2种磁化处理灌溉方式均能降低滨海盐碱地土壤盐分含量;不同灌溉处理的土壤盐分含量均值皆表现出:GW > CK > FW > MGW > MFW,土壤盐分含量随土层深度增加而降低。[结论] ①磁化水灌溉能够降低土壤盐分表聚,尤其在春、秋季适时采用磁化水灌溉,能够抑制土壤返盐,在20-40 cm土层效果更明显一些。②通过磁化地下浅表层微咸水进行适度灌溉,可以为该地区节约用水资源,有效地促进盐碱地土壤脱盐。
关键词:  磁化水  滨海盐碱地  黄河三角洲  刺槐林地  土壤盐分  时空分布
DOI:10.13961/j.cnki.stbctb.2019.05.019
分类号:S151;S156.4
基金项目:国家林业局948项目“高矿化度地下水磁化脱盐技术引进及其在林业灌溉中的应用”(2011-2015);山东省农业重大应用技术创新计划项目“磁化水灌溉技术在农业节肥节水及面源污染防治中的应用研究与示范”(鲁财农指[2016]36号)
Spatial and Temporal Distribution Characteristics and Variation Laws of Soil Salinity at Robinia Pseudoacacia Forest Land in Yellow River Delta Irrigation with Magnetized Water
Yan Tengfei1, Liu Xiumei2,3, Liu Heman1, Wang Huatian2, Hong Xuan1, He Chuang1, Wang Zhuangzhuang1
1.Xinyang Agriculture and Forestry University, Xinyang He'nan 464000, China;2.Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River, Shandong Agriculture University, Taian, Shandong 271000, China;3.Shanghai Environmental Science School, Shanghai 200135, China
Abstract:
[Objective] The temporal and spatial distribution characteristics and variation of soil salinity irrigated with magnetized water was explored in order to provide a theoretical basis for the magnetized water irrigation technology of coastal saline-alkali soil.[Methods] The coastal saline-alkali land of a Robinia pseudoacacia plantation in Dongying City was used as the research site to analyze the spatiotemporal distribution and evolution of soil salinity under four measures of freshwater irrigation (FW), magnetized freshwater irrigation (MFW), subsurface shallow brackish water irrigation (GW), and magnetized subsurface shallow brackish water irrigation (MGW).[Results] The two types of magnetized irrigation treatments (MFW and MGW) reduced the soil salinity in the coastal saline-alkali soil. The average salt content of the different irrigation treatments in the different soil layers followed the order:GW > CK(no irrigation) > FW > MGW > MFW and the soil salinity in the different soil layers decreased with an increase of soil depth.[Conclusion] ① Magnetization treatment significantly reduced the soil salt accumulation in the surface soil layer. Especially in the spring and autumn, the use of magnetized water irrigation can inhibit the return of salt to the soil, with the effect being more obvious in the 20-40 cm soil layer. ② Moderate irrigation by magnetizing subsurface shallow brackish water could save water resources for the region and effectively promote soil desalination in saline-alkali soils.
Key words:  magnetized water  coastal saline-alkali land  the Yellow River delta  Robinia pseudoacacia forest land  soil salinity  spatial and temporal distribution