Rapid fixation of mobile dunes and vegetation reconstruction technology
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图 2 Comparison pictures of before and after treatment
(Duolun honghuashan village, 2018-2019)
图 3 Comparison picture of before and after treatment
(Honghuashan village, Duolun, 2017-2019)
表 1 Topographical conditions
Elevation Topography Slope gradient Slope direction Slope position □ < 100 m □ Flat lands ■ Flat (0-5%) □ Sunny □ Up □ 101-500 m □ Hillside ■ Gentle (6-15%) □ Shady □ Middle ■ 501-1, 000 m □ Hilly slopes ■ Slope (16-25%) □ Half-sunny □ Down ■ 1, 001-1, 500 m □ Slopes □ Steep (26-35%) □ Half-shady ■ 1, 501-2, 000 m □ Valley floor □ 2, 001-2, 500 m ■ Sand dunes □ 2501-3, 000 m ■ Flat sandy land □ Cultivated land that slopes gently 
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表 2 Soil condition
Soil types Soil texture Effective soil layer thickness Organic matter content of surface soils Soil hardness Soil gravel content ■ Aeolian sandy soil ■ Sandy soil □ 0-20 cm □ High (> 3%) □ High ■ Light gravelly soil (1-5%) □ Calcium chestnut soil □ Sandy loamy soil ■ 20-50 cm □ Medium (1-3%) □ Medium □ Medium gravelly soil (5-10%) □ Brown calcium soil □ Loamy soil □ 50-100 cm ■ Low (< 1%) ■ Low □ Gravelly soil (10-30%) □ Cinnamon soil □ Clay □ 100-200 cm □ Light gravel (30-50%) □ Saline-alkali soil □ > 200 cm □ Medium gravel (50-70%) □ Others: □ Heavy gravel soil (> 70%)
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表 3 Vegetation status
Vegetation types Community coverage Vegetation degradation status □ Planted forests: (what kind of community) ■ < 5% □ Light ■ Sandy vegetation: (Agriophyllum squarrosum (Linn.) Moq. and Corispermum hyssopifolium L.) ■ 5-15% □ Moderate □ Bush: (what kind of community) □ 15-25% ■ Severe □Grassland: (what kind of community) □ 25-40% □ Artificial forest with dead treetops □Meadow: (what kind of community) □ > 40% □ Artificial forest with dead trees □Others:
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表 5 For specific technologies, please fill in the relevant information by selecting the technology category below.
Technological flow The main points of the technology Time (season or month) 1. Specific technical measures: engineered sand fixation, artificial seedling planting, and seeding afforestation. Engineered sand fixation: PE gauze, branches of Salix gordejevii Y. L. Chang et Skv.
Afforestation: Pinus sylvestris var. mongolica Litv., Salix gordejevii Y. L. Chang et Skv., Ulmus pumila L., etc.
Seeding afforestation: Artemisia desertorum Spreng. Syst. Veg., Corethrodendron fruticosum var. mongolicum (Turczaninow) Turczaninow ex Kitagawa, Agriophyllum squarrosum (Linn.) Moq., Caragana korshinskii Kom.Spring, rainy season 2. Land preparation: hole-shaped land preparation. Planting while digging. Rainy season 3. Density, configuration, planting pit specifications: plantation density: trees 2 m × 4 m, shrubs 1 m × 4 m. plantation configuration: row-belt type, width of 6-10 m. Planting pit specifications: tree container seedlings, 30 cm × 30 cm × 40 cm, bare root seedlings 50 cm × 60 cm × 60 cm. shrubs 40 cm × 40 cm × 60 cm. Artificial afforestation and revegetation under sand barrier protection.
Sand barrier specifications: strip sand barrier with a width of 2-4 m, grid sand barrier 2 m × 2 m, 4 m × 4 m. PE mesh with 20-22 mesh pores, mesh width 60 cm, 6m2 woven per pound of silk.
Direct seeding afforestation: Artemisia desertorum Spreng. Syst. Veg.: Corethrodendron fruticosum var. mongolicum (Turczaninow) Turczaninow ex Kitagawa : Agriophyllum squarrosum (Linn.) Moq. ratio is 4:2:2Spring, rainy season 4. Seedling requirements: height of Pinus sylvestris var. mongolica Litv. container seedlings 30-50 cm, length of Salix gordejevii Y. L. Chang et Skv. cuttings 50-65 cm with diameter 1.0-1.5 cm. Bare root seedlings of trees 2-3 cm in diameter. Grade II or above seedlings, free from disease and insect damage, with full top buds of conifers. Seedlings stay hydrated throughout. 5. Planting: Planting while digging. Remove plastic containers from container seedlings and trample them down. Salix gordejevii Y. L. Chang et Skv. cuttings are planted deeply and trampled and the cuttings are soaked in water for 24-48 h. Spring, rainy season. 6. Nurturing management: grazing ban, replanting Fencing of the project area. 3 year grazing ban. 7. Others
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表 6
Labour costs 2, 250~3, 000RMB/ha Machinery costs 6, 000~9, 000RMB/ha Cost of materials 5, 000 RMB/ha Water cost (if irrigation was required) Rain Fed Total cost 8, 250 ~12, 000RMB/ha
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