[1]SUN Hua,ZHAO Xuefeng,HE Maoping.Analysis of Ecological Benefits of Side Slope Protection by Typical Vegetation Along the Highway in Southwest Areas[J].Research of Soil and Water Conservation,2015,22(04):6-11.
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Analysis of Ecological Benefits of Side Slope Protection by Typical Vegetation Along the Highway in Southwest Areas
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 04
Page number:
6-11
Column:
Public date:
2015-08-28
- Title:
- Analysis of Ecological Benefits of Side Slope Protection by Typical Vegetation Along the Highway in Southwest Areas
- CLC:
- S157.2
- DOI:
- -
- Abstract:
- Using localization shrubs to reconstruct plant communities plays a very important role in superhighway side slope ecological protection, but its protection effect is easily affected by the configuration mode and reconstructing years. In this case, five typical vegetation modes composed by landscape transitional zone (ornamental arbors with 0.5 m×0.5 m of spacing + ground-cover plants with 0.05 m×0.1 m of spacing inthe rows) and slope protection zone (shrubs + herbages with 10 g/m2 of planting density), including Neosino calamus affinis—Buchloe dactyloides (M1), Coronilla varia—Festuca rubra (M2), Medicago falcate—Cynodon dactylon (M3), Coronilla varia—Lolium perenne (M4) and Vitex negundo—Setaria viridis (M5), reconstructed. Chengyu expressway in Yongchuan were taken as the example and foundation, their characteristics of runoff and erosion sediment in rainy seasons in the years from 2012 to 2014 were investigated, and the annual fluctuation of their ecological slope protection capacity was analyzed. Results showed that:(1) the annual herbaceous plants in the grass-shrub community, i. e., Vitex negundo+Setaria viridis grew rapidly, which turf-establishment stage (65 d) was transitory, its capacity of soil and water conservation (80.03% and 98.49%, respectively) were higher than other modes in the first growing season after turf-establishment (2012), and among five vegetation modes, its runoff and sediment yield (61.2 mm and 52.0 g/m2, respectively) were the lowest(p < 0.05). However, the perennial herbs (e.g., Cynodon dactylon, Lolium perenne and so on) in the grass-shrub communities grew tardily with more laggardly turf-establishment stages, and their outstanding capacities of soil and water conservation only showed in the second or third growing season after turf-establishment; (2) in the rainy seasons in 2013, ecological protection benefits of the grass-shrub communities (M1—M4) including perennial herbs improved apparently, which were especially outstanding in Coronilla varia+Lolium perenne (M4) and Medicago falcate+Cynodon dactylon (M3); (3) in the third growing season (2014), performance of artificial vegetations Medicago falcate+Cynodon dactylon (M3) was the most excellent in slope protection by means of developed root system of Bermuda grass, its capacity of soil and water conservation were 80.03% and 98.49%, respectively, its runoff and sediment yield were no more than 32.40 mm and 17.67 g/m2, respectively, and in contrast, that of M4 was the worst in the slope plot experiments where artificial vegetations were planted. Therefore, it can be seen that ecological protection benefit of artificial vegetation was closely related to their community characteristics, there was a positive correlation between the aboveground biomass of vegetation and their capacity of soil and water conservation in initial succession with determination coefficient (R2) more than 0.987, and did so between root biomass and these capacity in latter succession(R2≥0.998) when there were the same side slope conditions, seed quantity and planting measures.
- References:
-
[1] Luarcet R. Plant species diversity and polyploidy in islands of natural vegetation isolated in extensive cultivated lands[J] Biodiversity and Conservation,1997,6(4):591-613.
[2] 邓洪亮,孙丽霞,廖丹,等.复杂地质条件下岩石边坡的稳定性分析[J].水利与建筑工程学报,2008,6(1):45-48.
[3] Cary R F, Slaback R D. Plant materials and establishment techniques for vegetation of California desert highways[J]. Transportation Research Record,1983,969:24-26.
[4] 肖蓉,高照良,宋晓强,等.高速公路边坡植被特征分析及护坡模式优化研究[J].水土保持学报,2009,23(2):90-94.
[5] Cary R H, Sotir R B. Biotechnical stabilization of highway cut slope[J]. Journal of Geotechnical Engineer, ASCE,1992,118(9):1395-1409.
[6] 徐洪亮,满秀玲,盛后财.大兴安岭不同类型落叶松天然林水源涵养功能研究[J].水土保持研究,2011,18(4):92-96.
[7] 李妮,陈其兵,谭昌明.高速公路边坡乡土灌木建植模式水土保持效益[J].水土保持学报,2012,26(1):67-71.
[8] 王青杵,王改玲,石生新,等.晋北黄土丘陵区不同人工植被对水土流失和土壤水分含量的影响[J].水土保持学报,2012,26(2):71-75.
[9] 王川,孙铁军,金洪,等.人工植被建植对坡地水土流失的影响[J].水土保持学报,2009,23(3):29-33.
[10] 李佳,张小咏,杨艳昭.基于SWAT模型的长江源土地利用/土地覆被情景变化对径流影响研究[J].水土保持研究,2012,19(3):119-126.
[11] Zhou Z C, Shangguan Z P, Zhao D. Modeling vegetation coverage and soil erosion in the loess plateau area of China[J]. Ecological Modelling,2006,198:263-268.
[12] 潘声旺,何茂萍,杨丽娟,等.先锋植物丰富度对公路边坡植物群落生长发育及护坡效益的影响[J].林业科学,2013,49(11):24-31.
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1900-01-01