退化喀斯特地区植被恢复过程中苔藓的先锋作用

在贵州花江喀斯特高原生态综合治理试验示范区内采集苔藓植物样品，鉴别了主要苔藓种类，测定苔藓植物的持水性能，分析了苔藓、岩石接触面形成土壤的化学性质。结果表明：试验区内苔藓植物共有11科26属65种，以藓类植物为主；自然状态下苔藓植物含水率为36 %～898 %；新鲜苔藓持水率为2123 %～5159 %；苔藓、岩石接触面的土壤属于土壤养分分级的一级标准，各项养分指标亦明显高于对照样地。苔藓植物对喀斯特石漠生境有极强的适应性，是石漠化及其他退化生态系统进行人工生态恢复中理想的物种选择。

The vanguard role of bryophytes in the course of vegetation restoration of Karst degradation area

In the comprehensive treatment ecological demonstration area of Huajiang Karst plateau in Guizhou province,by collecting samples of bryophytes,identifying the major bryophytes species,checking the water retention ability in bryophytes,analyzing the chemical properties of soil formation in rock contact surface.The results showed that: The bryophytes in experimental area consisted of 11 families,26 genera,65 species,were dominated by mosses.Water content of natural bryophytes was ranged from 36 % to 89.8 %.The water holdup of fresh bryophytes was between 212.3% and 515.9%.The soil in bryophytes and rock contact surface was in the first standard of the soil nutrients classification.The indicators of soil nutrient were much higher than the blank sample.The results indicate that bryophytes are strongly adaptable to the Karst area.It’s an ideal choice to use bryophytes to restore vegetation to the stony desertification area.