Sand fixation and vegetation restoration technology with PE gauze screen sand barrier
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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 forest: (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 technological specifics, 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: sand fixation, artificial tree planting, seeding afforestation. Sand fixation engineering: material PE gauze mesh strips. The sand barrier is oriented vertically to windward and set along the contour.
Tree planting: Pinus sylvestris var. mongolica Litv., Salix gordejevii Y. L. Chang et Skv., Ulmus pumila L., etc.
direct seeding afforestation: Artemisia desertorum Spreng. Syst. Veg., Corethrodendron fruticosum var. mongolicum (Turczaninow) Turczaninow ex Kitagawa, Agriophyllum squarrosum (Linn.) Moq.Spring, rainy season 2. Land preparation: hole-shaped land preparation. Planting while digging. Rainy season 3. Density, configuration and planting pit specifications: Afforestation density: trees 3m × 4m, shrubs 1m × 4m. Afforestation configuration: 40-80cm near the leeward side of the sand barrier as a afforestation location. Planting pit specifications: 30m × 30cm × 40cm for tree container seedlings, 50m × 60cm × 60cm for bare root seedlings and 40m × 40cm × 60cm for shrubs. Artificial afforestation and revegetation under the protection of sand barriers.
Sand barrier specifications: grid sand barrier 2m × 2m, 4m × 4m. PE mesh pore size 20-22 mesh, mesh width 60cm, 6m2 woven per pound of silk. Direct planting afforestation: 4:2:4 ratio of Artemisia, Corethrodendron fruticosum var. mongolicum (Turczaninow) Turczaninow ex Kitagawa and Agriophyllum squarrosum (Linn.) Moq.Spring, rainy season 4. Seedling requirements: height of container seedlings of Pinus sylvestris var. mongolica Litv. 50-70cm; length of Salix gordejevii Y. L. Chang et Skv. Cuttings, 50-65cm, and thickness of 1.0-1.5cm; bare root seedlings 2-3cm in diameter. Grade II or higher grade seedlings, free from disease and insect damage, with full top buds of conifers. Seedlings should be kept moist.
.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, trampled. Soak the cuttings in water for 24-48h. Spring, rainy season. 6. Nurturing management: grazing ban, replanting Fencing of the project area. 3-year grazing ban. 7. Other
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表 6
Labor cost: 3, 000~4, 500 RMB / ha Material cost: 4, 500~6, 000 RMB / ha Water cost (if irrigation was required): Rain fed Total cost: 7, 500~10, 500 RMB / ha
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