关键词: 大兴安岭, 真菌, 棕色针叶林土, 土壤环境因子, 多样性

Abstract: The observation of sand transportation flux is one of the main tasks in desertification monitoring, the research on sandstorm, aeolian sand flux and wind erosion. It is also one of the measures for eco-environment monitoring in arid desertified lands, with sand sampler being one of the main instruments. At present, there are many kinds of sand samplers. However, there are no observational standards and instruments for precise observation. In abroad, the collecting efficiency of sand samplers, as tested by the optical particle flow sensor and the isokinetic method, was below 70%. In China, the sand collecting efficiency of sand sampler was tested in the wind tunnel, and the collecting efficiency was 72%-89%. The bottleneck of developing sand sampler is how to make the velocity of the air flow in the sand sampler be equal to that in the field. The breakthrough is to invent sand sampler with the flow velocity inside being equal to that in the field. The active sand sampler is able to solve this problem. However, this kind of sand sampler is not yet applied due to power problems. It is needed to formulate a unified observation standard to improve the precise observation of sand samplers. Such an improvement will facilitate the examination of the real situation of sandstorm and aeolian sand flow, the comparison and analyzation of vertical and horizontal sand flow, and the promotion of research on desertification and sandstorm.

Key words: fungi, soil environmental factor, diversity, brown coniferous forest soil, Daxing’anling Mountains