改性纤维素类固沙材料对草本植物出苗率及幼苗生长的影响  

Effects of Modified Cellulose Polymer Sand-Fixing Material on Emergence Rate and Seedling Growth of Herbaceous Plants

作　　者：袁进科[1] 陈杰 Yuan Jinke;Chen Jie(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]成都理工大学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

出　　处：《水土保持通报》2020年第3期268-273,共6页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目“纤维素类固化剂加固砂土边坡作用机理及抗冲蚀效应研究”(41702318);四川省国土资源厅项目“新型高聚物生态护坡材料与植被加固工艺研究”(KJ-2018-25)。

摘　　要：[目的]研究新型固沙材料与5种典型草本植物的相容性影响,为九寨沟景区震后生态恢复重建提供理论依据。[方法]基于改性纤维素类新型固沙材料和典型草本植物,利用基质吸力分析、植被模拟分析和相关统计等方法,探讨不同配比方式的固沙材料与草本植物的相容性机理。[结果]固沙材料基质吸力最终稳定在80 kPa左右,可以给植物根系生长提供稳定的供水环境;灯笼草和唐松草在两种配比的固沙材料中均有出苗,说明这两种植物与固沙材料相容性良好,从出苗率分布看,唐松草>灯笼草>金线草、茜草、夏枯草,其中唐松草出苗率达到30%;1∶3液固质量比的固沙材料含水率更高,植物株苗存活时间更长;种子出苗区域均位于固沙材料孔隙较大的位置。[结论]新型固沙材料基质吸力最终在80 kPa以内,1:2配比固沙材料的唐松草出苗率为30%,灯笼草平均根径达到2 mm,同时具有一定孔隙的固沙材料更适宜植物幼苗生长。[Objective]The compatibility impacts of new sand-fixing materials on five typical herbaceous plants were studied to provide a theoretical basis for the ecological restoration and reconstruction of the Jiuzhaigou scenic area after an earthquake.[Methods]Based on the new sand-fixing materials of modified cellulose and typical herbaceous plants,matric suction analysis,vegetation simulation analysis,and relevant statistics were used to study the compatibility mechanism between sand-fixing materials of different proportions and herbaceous plants.[Results]The matrix suction of the sand-fixing material was stabilized at approximately 80 kPa,which could provide a stable water supply environment for plant root growth.Physalis alkekengi and Thalictrum aquilegifolium had germinated in two kinds of sand-fixing material,indicating that these two plants had good compatibility with the sand-fixing materials.From the distribution of the germination rate,T.aquilegifolium>P.alkekengi>Rubia membranacea,Rubia cordifolia,Prunella vulgaris,the germination rate of T.aquilegifolium reached 30%.A 1∶3 liquid-solid mass ratio of sand-fixing material had a higher water content,and plant seedlings survived longer.The germination area of the seeds was at a position where the pores of the sand-fixing material were large.[Conclusion]The final matric suction of new sand-fixing material was within 80 kPa,the emergence rate of T.aquilegifolium with a 1∶2 ratio of sand-fixing material was 30%,the average root diameter of P.alkekengi was 2 mm,and the sand-fixing materials with a certain porosity were more suitable for the growth of plant seedlings.

关 键 词：沙土 改性纤维素 固沙剂 草本植物 出苗率 

分 类 号：S157[农业科学—土壤学] Q945.3[农业科学—农业基础科学]