[1]Wang Lei,Liu Qingyi,Shi Jingpan,et al.Effects of Different Vegetation Types on Soil Aggregate Stability in Riparian Zone of Plain Sandy Area[J].Research of Soil and Water Conservation,2024,31(01):96-104.[doi:10.13869/j.cnki.rswc.2024.01.011]
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Effects of Different Vegetation Types on Soil Aggregate Stability in Riparian Zone of Plain Sandy Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 01
Page number:
96-104
Column:
Public date:
2024-02-20
- Title:
- Effects of Different Vegetation Types on Soil Aggregate Stability in Riparian Zone of Plain Sandy Area
- CLC:
- S152.4
- DOI:
- 10.13869/j.cnki.rswc.2024.01.011
- Abstract:
- [Objective] This study aims to investigate the effects of vegetation types on the stability and organic carbon distribution in different soil aggregate components, and to provide the data about soil aggregate stability and erosion resistance in the riparian zone of plain sandy area. [Methods] Three riparian vegetation types(pure poplar plantation, pure willow plantation and poplar-willow plantation)with control(CK)were selected. Based on the wet sieving method, four indexes of stability, including>0.25 mm aggregate content(R0.25), mean weight diameter(MWD), geometric mean diameter(GMD)and fractal dimension(D), and organic carbon content of soil aggregates in 0—20 cm, 20—40 cm, and 40—60 cm soil layers were measured. The relationships between main varied indexes were analyzed using the Pearson method. [Results](1)The aggregates of each soil layer were mainly<0.25 mm microaggregates, which accounted for 50.33%～80.00% of the total. Three vegetation types had higher aggregate contents with size classes>2 mm and 0.25～2 mm than CK. The content of>2 mm macroaggregate in pure poplar plantation was the highest in each soil layers.(2)Compared with the control, R0.25,MWD and GMD of three vegetation types had their increased by 41.77%～91.28%, 29.89%～79.08% and 37.60%～94.32%, respectively. D of pure poplar plantation and pure willow plantation was significantly lower than that of the control(p<0.05).(3)The organic carbon content of aggregates in the experimental site soil layers ranged from 1.51 to 6.48 g/kg. Compared with the control, the organic carbon content of soil aggregates under the three vegetation types increased by 31.67%～71.68%, and the organic carbon content of aggregates in pure poplar plantation was significantly higher than that in pure willow plantation and poplar-willow plantation(p<0.05). Moreover, the highest value of organic carbon content of>2 mm aggregate in the 0—20 cm soil layers was found in pure poplar.(4)Linear regression analysis showed that the stability of soil aggregates was significantly correlated with organic carbon, especially with the content of large aggregates. In addition, fine root biomass, total nitrogen content, carbon to nitrogen ratio and water content were also important factors affecting the stability of soil aggregates. [Conclusion] Pure poplar plantation in riparian zone of plain sandy area is more conducive to improving soil aggregate stability and soil erosion resistance.
- References:
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Last Update:
2024-02-20