高寒地区工程创面草皮回铺技术改良及其土壤生态恢复效果  

Improvement of Grass Re-turfing Technology for Engineering Wounds in Highaltitude Regions and Its Effect on Soil Ecological Restoration

作　　者：李琪 李宇航 金博 文卓 李晓巍 王宝鹤 张卫彪 沈逸凡 张慧媛 雷泞菲 张晓超[1,2] 罗璟[1] 裴向军[1,2] LI Qi;LI Yu-hang;JIN Bo;WEN Zhuo;LI Xiao-wei;WANG Bao-he;ZHANG Wei-biao;SHEN Yi-fan;ZHANG Hui-yuan;LEI Ning-fei;ZHANG Xiao-chao;LUO Jing;PEI Xiang-jun(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu,Sichuan Province 610059,China;College ofEcology and Environment,Chengdu University of Technology,Chengdu,Sichuan Province 610059,China;Tianfu Yongxing Laboratory,Chengdu,Sichuan Province 610213,China;College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu,Sich-uan Province 610059,China;China Railway Construction Corporation Limited,Chengdu,Sichuan Province 610000,China)

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]成都理工大学生态环境学院,四川成都610059 [3]天府永兴实验室,四川成都610213 [4]成都理工大学环境与土木工程学院,四川成都610059 [5]中国铁建川藏铁路工程指挥部,四川成都610000

出　　处：《草地学报》2025年第2期644-653,共10页Acta Agrestia Sinica

基　　金：国家重点研发计划项目(2023YFC3007103);四川省博士后科学基金2023年度特别资助(10900-23BZ26-05);天府永兴实验室有组织的科研项目资助(2023KJGG05);地质灾害防治与地质环境保护重点实验室开放基金(SKLGP 2022K023)资助。

摘　　要：青藏高原道路工程建设在穿越高寒草甸时会剥离草皮形成众多工程创面,现有草皮回铺修复技术因高原脆弱环境导致其效果不佳。本论文在西藏汪布曲高寒草甸进行了重构草皮回铺技术改良的实地探究,考察浆土混合层与剥离草皮块厚度比、椰丝掺量、草皮块大小以及网垫类型对回铺草皮综合质量的影响。结果表明,各因素均显著提升了回铺草皮的土壤含水率;随着浆土粘结层与草皮厚度比的降低,土壤pH值显著降低,而有机碳含量则显著提升;浆土层与草皮厚度比对土壤脲酶活性有极显著影响,网垫类型与土壤蔗糖酶活性紧密相关;回铺草皮的土壤微生物群落特征在一定程度上发生了变化。确定最优参数为:工程创面上覆厚8 cm的浆土粘接层,厚2 cm的重构草皮块,椰丝掺量1.4%,草皮块大小为700 cm^(2)(35 cm×20 cm),并以方孔铁丝网作为下层网垫。本研究为高寒草甸工程创面生态修复提供了新的参考依据。During the construction of the Qinghai-Tibet Plateau Road,numerous engineering surfaces are formed in the high-altitude alpine meadows.Grass re-turfing is a commonly used method for ecological restora⁃tion.However,due to the fragile and sensitive ecological environment,the effectiveness of re-turfing is poor.This paper explored the field application of reconstructing grass re-turfing technology of engineering surfaces in Wangbuqu alpine meadows and investigated the influence of factors such as the ratio of soil-mix layer and the stripped turf thickness,coir fiber content,size of turf blocks,and type of mesh mat on the overall quality of returfed grass.The results showed that all these factors significantly increased soil moisture content after re-turf⁃ing.Decreasing the thickness ratio of the soil-mix layer and the turf,the pH decreased significantly,while the organic matter content increased significantly.Soil urease activities were significantly affected by the ratio of soil-mix layer and turf thickness,and the mesh mat type was closely related to soil sucrase activities.The char⁃acteristics of soil microbial community changed to some degree.The optimum technical parameters of re-turfing were as follows:the engineering wound surface was covered with an 8 cm thick soil-mix layer and a 2 cm thick turf,1.4%coir fiber content,700 cm^(2)(35 cm×20 cm)the turf block,and square hole wire mesh was used as the lower mesh pad.This study optimized the re-turfing technology of the alpine meadow and provided the new reference for dealing with alpine meadow degradation.

关 键 词：高寒草甸 草皮回铺 养分 微生物群落 草皮综合质量分析 

分 类 号：S145.2[农业科学—肥料学]