香格里拉亚高山两种植被类型主要植物的丛枝菌根研究

以滇西北香格里拉亚高山地区生态严重退化的荒草坡植被类型和基本实现恢复的近原生林地植被类型中主要植物的丛枝菌根真菌(AMF)作为研究对象,对这些植物根系的AMF感染率及其根际土壤中的AMF孢子密度进行了调查研究。结果表明,荒草坡的10种植物和近原生林地的9种植物,均形成典型的丛枝菌根(AM)。荒草坡和近原生林植物根际土壤中的平均孢子密度分别为674±221(SE)个/100g土和290±72个/100g土。单因素方差分析表明,两植被类型的主要植物在根系AMF菌丝感染率以及根际土壤中AMF孢子密度方面的差异都极显著。同种植物在近原生林地具有较高的AMF感染率,而根际土壤中的孢子密度则是在荒草坡为高。相关性分析表明,所调查植物的根系AMF菌丝感染率与根际土壤中的AMF孢子密度间不存在相关性。

Arbuscular Mycorrhiza across Two Vegetation Types in Shangri-la Subalpine Areas of Northwest Yunnan

The arbuscular mycorrzhizal(AM) colonization and spore density in barren grassland and primary forest in Shangri-la subalpine areas of northwest Yunnan province were investigated.All the ten plant species in barren grassland and nine plant species in primary forest were found to be colonized by arbuscular mycorrhizal fungi(AMF),and the average AMF spore density in two vegetation types were 674±221/100g soil and 290±72/100g soil respectively.One-way analysis of variance(ANOVA) showed that the AMF hypha colonization and spore density varied significantly between the two vegetation types.The plant species common to the two sampled sites had high AM fungal colonization in primary forest and high AMF spore density in barren grassland.No significant correlation between AM colonization and spore density was observed when vegetation types were either considered separately or together.