| Research on soil mineral and salinization erolution in the clay sand barrier\|artificial Haloxylon ammodendron forest system in desert areas |
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| DOI：10.7606/j.issn.1000-7601.2026.02.19 |
| Key Words: clay sand barrier artifical Haloxylon ammodendron forest soil nutrients salt ions soil salinization desert zone |
| Author Name | Affiliation | | SONG Dacheng | Gansu Hexi Corridor Forest Ecosystem Research Station, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China | | WU Hao | Gansu Hexi Corridor Forest Ecosystem Research Station, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China | | HE Fanglan | Gansu Hexi Corridor Forest Ecosystem Research Station, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China | | WEI Lemin | Linze Inland River Basin Research Station, Northwest Institute of Eco\|Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | KANG Jianjun | Linze Inland River Basin Research Station, Northwest Institute of Eco\|Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | HAN Shenghui | Gansu Hexi Corridor Forest Ecosystem Research Station, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China | | YAO Ze | Gansu Hexi Corridor Forest Ecosystem Research Station, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China | | MA Quanlin | Gansu Academy of Forestry, Lanzhou, Gansu 730020, China |
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| Abstract: |
| The clay sand barrier\|artificial Haloxylon ammodendron plantations established for 1, 5, 10, 20, 40, and 60 years in the Minqin desert region were taken as the study objects, and the mobile dunes were taken as the control. The soil pH, soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), soluble salt content, water\|soluble ions (CO2-3, HCO-3, Cl-, SO2-4, Ca2+, Mg2+, K+, Na+) compopsitions, and total alkalinity in the 0-100 cm soil layer were systematically analyzed to elucidate the mechanisms of the long\|term protection system on soil nutrient accumulation and salinization evolution. The results showed that the clay sand barrier\|artificial Haloxylon ammodendron plantations system significantly promoted the accumulation of soil nutrients, with SOC, TN, and TP concentrations exhibiting a steady increase with the length of installation, averaging 17.50%, 14.29%, and 16.67% higher, respectively, than those in mobile sand dunes. The system had an obvious regulation effect on salt ions, and the contents of Cl-, SO2-4, Ca2+, K+, and Na+ increased with fluctuations as a whole, which were 8.16%, 17.28%, 23.65%, and 12.07% higher than those of the mobile sand dunes, respectively. However, the variation range of relative abundance gradually weakened with the increase of years, and it approached the level of the mobile sand dunes at 60 a. Concurrently, the system effectively reduced the soil total alkalinity, with an average decrease of approximately 0.03 cmol·kg-1 across all barrier sites compared to the control, indicating alleviation of soil alkalinity. Correlation analyses identified Cl-, SO2-4, Ca2+, Mg2+, pH, and total alkalinity as key indicators of soil salinization in the 0-100 cm profile, whereas TN and TP exhibited weak associations with salinity and alkalinity parameters, suggesting their accumulation processes are largely independent. |
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