造林树木对宁夏盐碱土水盐分布的影响
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S156.4

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第五批“ 宁夏青年科技人才托举工程” 项目、宁夏自然科学基金项目(2020AAC03301)和农业基础性长期性科技工作观测监测项目(NAES091AE18)资助。


Effects of Afforestation Trees on Soil Water-salt Distribution in Saline-alkali Soil of Ningxia
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    摘要:

    针对宁夏盐碱土壤盐分在土体迁移的特点,不同造林树木对盐碱土水盐空间分布特征有差异的实际问题,采用野外调查与室内检测相结合的方法,进行不同造林树木对宁夏盐碱土水盐空间分布及土壤盐碱性质的影响研究。结果表明:①盐柳小区地表土壤水分离树干越远土壤含水率越高,盐分在远离树干20 ~ 60 cm土壤剖面累积;柽柳小区在60 ~ 100 cm土层处的土壤含水率明显低于其他土层,9901柳小区40 ~ 80 cm土层处土壤含水率最低,柽柳、9901柳小区土壤盐分累积在60 cm以下土层;②3种造林树木条件下表层土壤水分属中等变异,其他土层属弱变异,盐柳、9901柳小区土壤盐分属中等变异,柽柳小区0 ~ 40 cm土壤盐分属中等变异,40 cm以下土层属弱变异;③种植树木降低土壤pH、容重,越靠近树干效果越明显,3种树木土壤的pH、容重属弱变异,空间分布较均匀。研究结果揭示了不同造林树木对土壤水盐分布的影响,对盐碱地植被恢复具有指导意义。

    Abstract:

    The spatial distribution of water-salt is different in saline-alkali soils under different afforestation trees. The effects of different afforestation trees on soil water-salt distribution and saline-alkali soil properties were studied through using field investigation and indoor detection in Ningxia. The results show that: 1) In Salix psammophila plot, the further from the trunk, the higher topsoil moisture is, and salt is accumulated in 20-60 cm soil layer away from the tree trunk. Soil moisture is significantly lower in 60-100 cm layer in Tamarix chinensis plot than in other layers, soil moisture is the lowest in 40-80 cm layer in Salix matsudana ‘9901’ plot, salt is accumulated below 60 cm layer in Tamarix chinensis and Salix matsudana ‘9901’ plots. 2) Topsoil moisture is moderate variation under three afforestation trees and weak variation in other layers. Soil salinity are moderate variation in Salix psammophila and Salix matsudana ‘9901’ plots, moderate variation in 0-40 cm layer in Tamarix chinensis plot, and weak variation in layer below 40 cm. 3) Planting trees can reduce soil pH and bulk density, and the effects are more obvious when the trees are closer to the trunk. Soil pH and bulk density of the three trees show weak variation and relatively uniform spatial distribution. The results reveal the influence of different afforestation trees on soil water-salt distribution in saline-alkali soil, which is of significance for the restoration of vegetation in saline-alkali land.

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王旭,樊丽琴,张永宏,沈婧丽,肖爱萍,赵瑞娟.造林树木对宁夏盐碱土水盐分布的影响[J].土壤,2023,55(1):211-217. WANG Xu, FAN Liqin, ZHANG Yonghong, SHEN Jingli, XIAO Aiping, ZHAO Ruijuan. Effects of Afforestation Trees on Soil Water-salt Distribution in Saline-alkali Soil of Ningxia[J]. Soils,2023,55(1):211-217

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  • 收稿日期:2022-03-14
  • 最后修改日期:2022-04-14
  • 录用日期:2022-04-18
  • 在线发布日期: 2023-03-10
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