山西南部地木耳群落特征及其资源分布的研究

STUDIES ON THE COMMUNITY FEATURE AND RESOURCE DISTRIBUTION OF NOSTOC COMMUNE IN THE SOUTHERN SHANXI PROVINCE

摘要: 采用样方法对不同生境中地木耳分布规律进行了研究；分析了地木耳的群落特征及其生物量,结果表明:①群落种类组成,共有38种,34属,21科,单科单种14种；②群落垂直结构简单,只有灌木层、草本层和地被层；③地木耳平均生物量为10kg/hm²,干重7.3kg/hm²,湿重140kg/hm²;④地木耳的自然含水量42%,持水量18.6%,在海拔600～800m之间,地木耳生物量最大；⑤地木耳与白羊草、针茅的分布具有一致性。

Abstract: The distrbution regularity of Nostoc commune in different living environments was studied by using the plot method.The community feature and biomass of the Nostoc commune community were analyzed.The results showed:(1) the specific composition of Nostoc commune community is 38 species,34 genera,21 families and 14 mon-family mon-species;(2) the vertical structure of the community is the shrub-layer and grass layer and cover plant layer;(3) average biomass of it is 10 kg/hm²,and dry weight 7 3 kg/hm² and wet weight 140 kg/hm²;(4) natural water content of it is 42% and water holding capacity 18.6%.The biomass is the largest in altitude 600～800 m;and (5) Nostoc commune consists with Bochriobloa ischaemum and Stipa in the distribution.