藓类结皮层人工培养试验和维持机制研究

Experiment of Artificially Culturing Moss Crust and Its Maintenance Mechanism

2006年开始在库布齐沙漠选择4种藓类植物进行人工培养促进结皮层形成实验,发现人工结皮层中藓类成活率、盖度与土壤基质、降雨量、小生境和藓类植物的生长和繁殖特性密切相关。双色真藓(Bryum dichotomum)成活率和盖度最高,密度与盖度相关,可形成大面积藓类结皮层。单位面积内土生对齿藓(Didymodon vinealis)密度最大,对结皮层的稳定具有重要作用。在培养初期藓类植物生长和繁殖速度较快的原因是消耗繁殖体内营养的结果,以后稳定在一个水平上不会出现生长的高峰期。本项研究为人工培养藓类植物促进结皮层的形成提供了实验依据,并为深入探讨生物结皮层的形成和维持机制提供基础科学资料。

Experiment of artificially culturing moss crust has been carried out in Hobq Desert since 2006.The experiment results showed that the moss survival rate and coverage were closely related to soil matrix,precipitation,microhabitat and the development and reproduction identity of moss species.Bryum dichotomum Hedw.could form large area of moss crust owing to its highest survival rate and coverage,and its density was related to its coverage,while Didymodon vinealis（Brid.）Zand.played an important role in maintaining crust stability for its highest density in unit area.Moss species had a high speed of growth and reproduction in the prime of culture process as a result of consuming the nutrition of propagules,then it would stay at a level and the growth peak would not occur.The research provides experimental basis for artificially culturing moss crust and offers basic experiment data for in-depth exploration of the formation and maintainance mechanism of biological crust.