[1]QU Dongxu,LYU Gang,ZHAI Jingxuan,et al.Effects of Root System of Different Forest and Grass Measures on Soil Anti-Scouring in Southern Margin of Horqin Sandy Land[J].Research of Soil and Water Conservation,2020,27(01):21-25.
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Effects of Root System of Different Forest and Grass Measures on Soil Anti-Scouring in Southern Margin of Horqin Sandy Land
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
21-25
Column:
Public date:
2020-02-20
- Title:
- Effects of Root System of Different Forest and Grass Measures on Soil Anti-Scouring in Southern Margin of Horqin Sandy Land
- Keywords:
- Northwest Liaoning windy and sandy land; soil erosion resistance; plant roots; scouring of undisturbed soil
- CLC:
- S157.2
- DOI:
- -
- Abstract:
- In order to prove the mechanism of the influence of vegetation root system on soil anti-scouribility in sandy land, different forest and grass measures in southern margin of Horqin sandy land were taken as the research samples, and the root distribution characteristics of different forest and grass measures and their effects on soil anti-scouribility were analyzed by combining field sampling with soil erosion test. The results showed that under different forest and grass measures in sandy land, the root length and density of<0.5 mm were the most, and the total root length and density decreased in the order: Populus L.>Pinus sylvestris var>shurb land>unused grassland>Arachis hypogaea Linn, besides, the distribution of root system in different diameter classes had greater spatial variability in soil, root density decreased in the order: Populus L.>Pinus sylvestris>Arachis hypogaea Linn.>shurb land>bare sand, root biomass showed the same trend as the root density; reinforcement value of soil anti-scouribility decreased in the order: Pinus sylvestris>Populus L.>shurb land>bare sand>Arachis hypogaea Linn., percentages of soil anti-scouribility enhancement decreased in the order: Pinus sylvestris>Populus L.>shurb land>bare sand>Arachis hypogaea Linn; the soil anti-scouribility reinforcement value was positively correlated with lengths of roots with diameters of <0.5 mm, 0.5～1 mm and 1～3 mm, and negatively correlated with length of root with diameter of >3 mm. root system with 1～3 mm in diameter is the main factor affecting soil anti-scouribility. The root with 3 mm in diameter is the threshold of the effect of root length on soil anti-scouribility reinforcement. Effect of forestland on reinforcement of soil anti-scouribility was significant. Therefore, it is suggested that the forestland should be increased.
- References:
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Last Update:
2020-02-29