Effect of AMF-maize combination on water and salt distribution in soil under the dump reconstruction mode of “topsoil-aquifer-aquitard”

BI Yinli; YANG Wei; KE Zengming; WU Chao; LI Mingchao; XUE Chao

doi:10.12363/issn.1001-1986.22.08.0619

Volume 51 Issue 4

Apr 2023

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COAL GEOLOGY & EXPLORATION > 2023 > 51(4): 68-75.

BI Yinli，YANG Wei，KE Zengming，et al. Effect of AMF-maize combination on water and salt distribution in soil under the dump reconstruction mode of “topsoil-aquifer-aquitard”[J]. Coal Geology & Exploration，2023，51(4)：68−75. doi: 10.12363/issn.1001-1986.22.08.0619

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Effect of AMF-maize combination on water and salt distribution in soil under the dump reconstruction mode of “topsoil-aquifer-aquitard”

doi: 10.12363/issn.1001-1986.22.08.0619

BI Yinli^{1, 2, 3
,},
YANG Wei^{1, 2},
KE Zengming^{1, 2},
WU Chao^{1, 2},
LI Mingchao^{1, 2},
XUE Chao^{1, 2}

1.
Institute of Ecological Environment Restoration in Mine Areas of West China, Xi’an University of Science and Technology, Xi’an 710054, China
2.
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
3.
State Key Laboratory for Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China

Received Date: 15 Aug 2022
Rev Recd Date: 02 Mar 2023

Available Online: 14 Apr 2023

Issue Publish Date: 25 Apr 2023

Abstract

Abstract

The distribution of soil water and salt severely affects the ecological reconstruction and plant configuration modes at coal mine dumps. To investigate the characteristics of soil water and salt distribution under the three-layer reconstruction mode of “topsoil-aquifer-aquitard” in coal mine dump under the influence of mycorrhizal plants, laboratory soil column test was conducted, in which the soil was treated in three ways: planting maize and inoculating with arbuscular mycorrhizal fungi (YM+AMF), planting maize (YM) only, and no planting of maize + no inoculation with bacteria (CK). The results showed that: (1) The different treatments have no significant effect on the water migration characteristics at the bottom of the soil column, and the rise height of capillary water in the aquifer is about 10 cm in all treatments. (2) The distribution of water and salt is positively correlated with soil depth. AMF inoculation is beneficial to maintain the water content of soil in the surface layer, which was increased by 52.0% and 43.9% respectively compared with YM treatment at 0‒10 cm and 10‒20 cm. The salt content of soil at 10‒50 cm is reduced by inoculation, and the electrical conductivity of soil at 20‒30 cm, 30‒40 cm and 40‒50 cm is 41.0%, 14.1% and 8.1% lower than that of YM treatment, respectively. (3) The contribution rate of soil moisture at different depths to maize was quantified with the MIXSIAR model. The results indicate that the main water supply layer is located at 0‒10 cm for YM and YM+AMF treatments, of which the water supply rate is 44.3% and 30.5%, respectively. Besides, bacterial inoculation significantly increases the water contribution rate of the middle and deep soil profile (20‒70 cm), with a cumulative increase of 13.8%. The research results have important scientific guiding significance for the ecological reclamation of “planting with water” in the western mining area.
- soil layer reconstruction,
- soil column test,
- water and salt distribution in soil,
- AMF,
- hydrogen and oxygen isotope

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References(31)

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