| 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。 |
| 关键词: 沙土 改性纤维素 固沙剂 草本植物 出苗率 |
| DOI：10.13961/j.cnki.stbctb.2020.03.039 |
| 分类号:S157;Q945.3 |
| 基金项目: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） |
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| Effects of Modified Cellulose Polymer Sand-Fixing Material on Emergence Rate and Seedling Growth of Herbaceous Plants |
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Yuan Jinke, Chen Jie
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State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China
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| Abstract: |
| [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. |
| Key words: sandy soil modified cellulose polymers sand-fixing material herbaceous plant emergence rate |
