贵州省茅台镇砂页岩结皮层藓类植物的生态功能

Ecological functions of sandy shale moss crust in Maotai Town of Guizhou Province, Southwest China

对贵州省茅台镇砂页岩结皮层藓类植物物种进行了调查,并测定了其优势植物的生物量、成土量和饱和吸水量,以了解藓类植物在水土流失防治中的作用。调查发现:藓类植物5科6属6种。优势结皮藓类植物华中毛灰藓、厚壁紫萼藓、小叶藓、真藓的生物量、成土量和饱和吸水量分别为0.5～104g·m-2、1.6～481g·m-2和2.8～1987g·m-2,其中,华中毛灰藓的生物量、成土量和饱和吸水量均远远高于其他结皮藓类,在砂页岩水土流失区域生物土壤结皮层中起着关键性的作用,对治理砂页岩水土流失具有重要的意义。

An investigation was conducted on the moss species in the biotic crust of sandy shale in Maotai Town of Guizhou Province, and the biomass, pedogenesis amount, and saturated water absorption amount of dominant moss species were measured, aimed to understand the role of moss crust in soil and water loss control. Six moss species were recorded, belonging to 6 genera of 5 families, among which, Hornornalliurn plagiangium, Grirnmia sessitana, Epipterygiurn tozeri, and Bryurn argenteum were the dominant species. The biomass, pedogenesis amount, and saturated -2 water absorption amount of the four dominant moss species ranged in 0.5-104 g·m^-2 , 1.6-481 -2 -2 g·m^-2 , 2. 8-1987 g·m^-2 , respectively, and were far higher for H. plagiangiurn, suggesting its key role in the formation of soil biotic crust on the sandy shale, and its significance in the wa ter and soil loss control in study area