两种草本植物种子萌发与幼苗生长对植被混凝土水泥含量的响应
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摘要
为探讨植被混凝土生态防护技术在西南高山亚高山地区工程边坡生态恢复中的应用,本研究以冰草(Agropyron cristatum (L.)Gaertn)和垂穗披碱草(Elymus nutans Griseb.)为研究对象,测定了两种草本植物种子萌发与幼苗生长对植被混凝土水泥含量的响应.结果表明,两种草本植物在水泥胁迫下均能保持较高的发芽率、发芽势和发芽指数.幼苗株高、地上生物量、根长、根表面积、地下生物量均随着水泥含量的升高而下降,总生物量在10%水泥处理组降到对照组的50%以下.上述结果表明冰草、垂穂披碱草可以应用于西南高山亚高山地区植被混凝土生态修复,6%～8%是该地区植被混凝土应用比较适宜的水泥含量,在高陡边坡生态恢复的最高水泥含量应不超过10%.
The response of seed germination and seedling growth of two herbaceous,Agropyron cristatum(L.)Gaertn and Elymus nutans Griseb.,to the concrete content of vegetation concrete matrix were tested to determine whether they could be used for the concretes biotechnical slope(CBS)technology in the alpine and subalpine permafrost regions of southwestern China.The results show that seed germination of the two herbaceous were not affected significantly by cement content,relatively high germination rates,germination potential and germination indexes are found in both herbaceous.However,seedlings growth of the two herbaceous were influenced significantly by cement content.The plant height,aboveground biomass,root length,root surface area and underground biomass decreased with the increase of cement concentration,showing significant negative correlations.The total biomass of 10% cement treatment group decreased by50% contrast to the control group.It is concluded that Agropyron cristatum and Elymus nutans can be applied in the CBS technology for the ecological restoration in the alpine and subalpine permafrost regions of southwestern China.The appropriate range of cement content is 6%-8%.The highest cement concentration should not exceed 10%for the high-steep slope.
The response of seed germination and seedling growth of two herbaceous,Agropyron cristatum(L.)Gaertn and Elymus nutans Griseb.,to the concrete content of vegetation concrete matrix were tested to determine whether they could be used for the concretes biotechnical slope(CBS)technology in the alpine and subalpine permafrost regions of southwestern China.The results show that seed germination of the two herbaceous were not affected significantly by cement content,relatively high germination rates,germination potential and germination indexes are found in both herbaceous.However,seedlings growth of the two herbaceous were influenced significantly by cement content.The plant height,aboveground biomass,root length,root surface area and underground biomass decreased with the increase of cement concentration,showing significant negative correlations.The total biomass of 10% cement treatment group decreased by50% contrast to the control group.It is concluded that Agropyron cristatum and Elymus nutans can be applied in the CBS technology for the ecological restoration in the alpine and subalpine permafrost regions of southwestern China.The appropriate range of cement content is 6%-8%.The highest cement concentration should not exceed 10%for the high-steep slope.
引文
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[17]Liu D,Xu W,Cheng Z,et al.Improvement Test on Frost Resistance of Vegetation-concrete and Engineering Application of Test Fruitage[J].Environmental Earth Sciences,2013,69(1):161-170.
[2] Bao X,Ye B,Ye G,et al.Co-seismic and Post-seismic Behavior of a Wall Type Breakwater on a Natural Ground Composed of Liquefiable Layer[J].Natural Hazards,2016,83(3):1-21.
[3]许文年,王铁桥,叶建军.岩石边坡护坡绿化技术应用研究[J].水利水电技术,2002,33(7):35-36.
[4] Chen S,Ai X,Dong T,et al.The Physico-chemical Properties and Structural Characteristics of Artificial Soil for Cut Slope Restoration in Southwestern China[J].Scientific Reports,2016,6:20565.
[5] Xiao H,Huang J,Ma Q,et al.Experimental Study on the Soil Mixture to Promote Vegetation for Slope Protection and Landslide Prevention[J].Landslides,2015,2(4):1-11.
[6]何财松,青藏铁路格拉段运营初期植被恢复效果评价研究.北京:中国铁道科学研究院,2013.
[7]三峡大学,水电水利规划设计总院.NB/T 35082-2016水电工程陡边坡植被混凝土生态修复技术规范[S].北京:中国电力出版社,2016.
[8]周德培,张俊云.植被护坡工程技术[M].北京:人民交通出版社,2013.
[9] Chen F Q,Xu Y,Wang C,et al.Effects of Concrete Content on Seed Germination and Seedling Establishment in Vegetation Concrete Matrix in Slope Restoration[J].Ecological Engineering,2013,58:99-104.
[10]王晓龙,李红,闫利军,等.5种禾本科牧草种子萌发及幼苗耐盐性鉴定[J].种子,2016,35(8):27-31.
[11]Osman N,Barakbah S S.The Effect of Plant Succession on Slope Stability[J].Ecological Engineering,2011,37(2):139-147.
[12]Gao G J,Yuan J G,Han R H,et al.Characteristics of the Optimum Combination of Synthetic Soils by Plant and Soil Properties Used for Rock Slope Restoration[J].Ecological Engineering,2007,30(4):303-311.
[13]Xu Y,Chena F.Effects of Concrete Content in Vegetation Concrete Matrix on Seed Germination and Seeding Establishment of Cynodon Dactylon[J].Procedia Engineering,2012,38(10):105-109.
[14]裴得道,许文年,郑江英,等.水库消落带植被混凝土抗侵蚀性能研究[J].三峡大学学报(自然科学版),2008,30(6):45-47.
[15]Luo Y,Zhou D,Zhang J.Experiments on a New Material for the Ecological Protection of Rock Slopes[J].Energy Procedia,2012,16(Part A):272-277.
[16]Rasse D P,Smucker A J M,Santos D.Alfalfa Root and Shoot Mulching Effects on Soil Hydraulic Properties and Aggregation[J].Soil Science Society of America Journal,2000,64(2):725-731.
[17]Liu D,Xu W,Cheng Z,et al.Improvement Test on Frost Resistance of Vegetation-concrete and Engineering Application of Test Fruitage[J].Environmental Earth Sciences,2013,69(1):161-170.