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- Title
水分对具鞘微鞘藻构建人工藻结皮的作.
- Authors
张丙昌; 王敬竹; 张元明; 张华
- Abstract
To explore the roles of moisture in the construction of man鄄made algal crust with inocula鄄 ted Micocoleus vaginatus, a laboratory experiment was conducted to study the variations of the microalgal biomass, algal crust thickness, crust compressive strength, and crust microstructure under six moisture doses and four moisture treatment intervals. When M. vaginatus was inoculated to the naked sands without moisture addition, the microalgal biomass was very low, and no algal crust was formed. With increasing dose of moisture, the microalgal biomass, algal crust thickness, and crust compressive strength increased significantly, and the algal filaments and extracellular polysaccharides (EPS) had a gradual increase, wrapped around the sands and formed a complex network. After 15 days moisture treatment, stable algal crust was formed, which had the highest microalgal biomass, crust thickness, and crust compressive strength. The optimal moisture dose for M. vaginatus to form man-made algal crust was 3-4 L·m-2·d-1, and the addition of moisture should be continued for 15 d. The availability of the moisture promoted the metabolic processes of M. vaginatus and the synthesis of the algal EPS, which increased the microalgal biomass and its ability to resist desiccation. The moisture availability at early stage was the key factor for M. vaginatus to successfully form algal crust. This study could offer some guidance for the recovery of biological soil crusts in the field.
- Publication
Yingyong Shengtai Xuebao, 2013, Vol 24, Issue 2, p535
- ISSN
1001-9332
- Publication type
Article