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| DOI：10.13522/j.cnki.ggps.2025270 |
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| Growth and soil quality improvement potential of introduced Apocynum venetum in Northwestern Liaoning Province |
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LYU Jinhao, LYU Linyou, LI Wanzhuo
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Institute of Sand Management and Utilization of Liaoning Province, Fuxin 123000, China
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| Abstract: |
| 【Objective】Wind-sandy lands in Northwestern Liaoning Province are highly susceptible to soil erosion and desertification, posing threats to local agriculture and ecosystem stability. Apocynum venetum, a hardy shrub native to Northwestern China, has the potential for soil stabilization and water retention in sandy soils. This study evaluates the feasibility of introducing A. venetum to improve the quality of wind-sandy soils in this region.【Method】Apocynum venetum and Poacynum hendersonii were used as the model plants and grown in three different planting densities (M1-M3). During the experiment, we measured growth traits of the plants, including their root mechanical properties, and assumed soil quality improvement.【Result】With increasing growth duration, plant height, crown width, branch number, and aboveground biomass of both species increased. Maximum aboveground biomass reached 133.56 g/cm2 for A. venetum in M1 and 103.64 g/m2 for P. hendersonii in M2. Root biomass of A. venetum was 61.32 g/cm2 in M1, 27.39 g/cm2 in M2, and 23.12 g/cm2 in M3, while that of P. hendersonii was 72.84 g/cm2, 34.95 g/cm2 and 36.1 g/cm2 in M1, M2 and M3, respectively. Root tensile resistance of A. venetum in M1, M2 and M3 was 24.62 N, 32.67 N, and 22.39 N respectively, and their associated tensile strength was 6.08 MPa, 6.31 MPa and 5.20 MPa in M1, M2 and M3. The tensile resistance of P. hendersonii in M1, M2 and M3 was 32.54 N, 30.64 N and 31.77 N, respectively, and their associated tensile strength was 5.32 MPa, 5.81 MPa and 5.30 MPa. Both root tensile resistance and strength increased with root diameter in power-law functions, with determination coefficients of 0.866 and 0.880 for A. venetum, and 0.305 and 0.625 for P. hendersonii. No significant differences were found between the two species in soil bulk density, maximum water-holding capacity, capillary water-holding capacity, and stable infiltration rate. These soil properties were positively correlated with A. venetum planting density and inversely correlated with soil depth. 【Conclusion】Apocynum venetum exhibited high survival in the wind-sandy lands of Northwestern Liaoning Province. Its root system contributes to water retention and soil conservation. However, the long-term effects of A. venetum on soil quality require further investigation. |
| Key words: Apocynum venetum; wind sandy land in Northwestern Liaoning Province; ecological characteristics; tensile strength; soil improvement |
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