Effects of Different Grass Planting Methods on Vegetation Restoration of Moving Sand Dune in Alpine Grassland
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S157.2

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    Abstract:

    [Objective] To provide technical support for desertification control, the effects of grass planting methods on vegetation restoration of moving sand dunes in alpine grasslands were studied.[Methods] On a moving sand dune of Maqu County, Gansu Province, experiments involving different seeding modes, different grass species, and different grass planting modes were conducted to analyze the effects of different grass planting methods on vegetation restoration.[Results] Broadcast seeding and drill seeding had no significant effect on vegetation restoration. Overall, grass species had little effect on vegetation restoration, and it was only necessary for planting Elymus nutans in the vegetation restoration of moving dunes. The planting mode had a significant effect on vegetation restoration. In the second year of grass planting, the height, density, coverage, above-ground biomass fresh weight, and dry weight of grass were significantly increased in paving cow and sheep dung mode compared with no paving cow and sheep dung mode. In the same modes of paving cow and sheep dung, the height and coverage of grass were significantly higher in "cow and sheep dung + no sand barrier grass" mode with a thickness of cow and sheep dung of approximately 2 cm than in "cow and sheep dung + sand barrier grass" mode with a thickness of cow and sheep dung of approximately 1 cm. The grass growth status was positively correlated with soil nutrient and water holding capacity.[Conclusion] "Cow and sheep dung + no sand barrier" grass planting mode was the optimal mode of vegetation restoration of moving dunes in the study area. If the thickness of the cow and sheep dung was approximately 2 cm, it was no longer necessary to set other sand barriers for sand fixation.

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李银科,唐进年,王祺,袁宏波,杨雪梅,何芳兰.高寒草原不同种草方式对流动沙丘植被恢复的影响[J].水土保持通报英文版,2021,41(1):22-28

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History
  • Received:September 13,2020
  • Revised:November 19,2020
  • Adopted:
  • Online: March 16,2021
  • Published: