中文摘要：

在野外样方调查的基础上研究了准格尔黄土丘陵沟壑区9种不同植被类型地面生苔藓植物物种多样性及其与环境因子之间的相关性：（1）共发现苔藓植物8科18属35种，以丛藓科（Potfiaceae）和真藓科（Bryaceae）为优势科，优势种有真藓（Bryum argenteu）、双色真藓（Bryum bicolor）、土生对齿藓（Didymodon vinealis）、褶叶青藓（Brachythecium salebrosum）、灰藓凹叶变种（Hypnum cupressiforme var．lacunosum）等10种；（2）Alpha多样性指数中，Patrick丰富度指数在4—21种，Shannon—Wiener指数和Simpson多样性指数分别在1．0780—2．1533和0．5889—0．8263，天然植被变化规律为杜松林（Juniperus rigida forest）〉茭蒿群落（Artemisia giraldii shrub）〉山桃林（Prunu davidiana forest）〉锦鸡儿群落（Caragana intermedia shrub）〉本氏针茅群落（Stipa bungeana steppe）〉百里香群落（Thymus serpyllum steppe），而人工杨树林（Populussimoniiforest）、侧柏林（Platycladus orientalis forest）与锦鸡儿灌丛以及人工油松林（Pinus tabulaeformis forest）与杜松林上述3个指数相近；（3）影响物种多样性的主要环境因子有土壤水分、空气湿度和光照强度；（4）Bata多样性指数在0．2400—0．8571，本氏针茅群落与人工杨树林物种相似性最大，百里香群落与杜松林物种相似性最小，群落之间物种组成相似性和差异性能够揭示各样地生境差异性和相似性。杜松林下的苔藓植物物种多样性为最高，是该地区地面生苔藓植物物种多样性保护的主要地区。

英文摘要：

Based on the quadrat survey of ground bryophytes community under nine kinds of vegetation in Junger loess Hill-Cully, we studied the species diversity and its relationship with the environmental factors. （ 1 ） We found 8 families, 18 genera, and 35 species bryophytes, among which Pottiaceae and Bryaceae were dominant families, and Bryum argenteum, Didymodon vinealis, Brachythecium salebrosum, Bryum bicolour, Hypnum cupressiforme var. lacunosum, etc were dominant species; （2）Among the Alpha diversity index, Patrick index was 4 -21 species, Shannon-Wiener index and Simpson diversity index were 1. 078 0 -2. 153 3 and 0. 588 9 -0. 826 3, respectively, and the order in natural vegetation was Juniperus rigida forest 〉 Artemisia giraldii shrub 〉 Prunu davidiana forest 〉 Caragana intermedia shrub 〉 Stipa bungeana steppe 〉 Thymus serpyllum steppe. The three indexes of artificial forest of Populus simonii forest and Platycladus orientalis forest were close to those of the Caragana intermeclia shrub, and Pinus tabulaeformis forest was close to those of the Juniperus rigida forest; （3）The main ecological factors affecting the diversity of bryophytes were soil water content, air humidity and light intensity ; （4） Bata diversity index was 0. 240 0 - 0. 857 1, the species similarity between Stipa bungeana steppe and Artificial Populus simonii forest was the highest, and was the lowest between Juniperus rigida forest and Thymus serpyllum community. The bryophyte community in Juniperus rigida forest, the key area for bryophyte diversity conservation in Junger loess Hill-Cully, had the richest species diversity.