甘南合作和肃南马蹄中国沙棘群落的特征与类型

在调查甘南合作和肃南马蹄中国沙棘群落的基础上，将两地中国沙棘群落划分为９个群落类型，分析了中国沙棘群落的区系组成、生活型、外貌及结构特征．结果表明，中国沙棘群落是一种温性落时灌丛，是森林－草原（草甸）过渡带的成员．探讨了中国沙棘群落密度和果产量之间的关系，指出人工营造沙棘林时其雌雄比应以１０：１～５：１为宜，并应根据不同的生态条件确定不同的沙棘种植密度．

Phytocoenological features and types of Hippophae rhamnoides subsp.sinensis community in Hezuo,Gannan and Mati,Su'nan

Accordins to the investigation of Hippophae rhamnoides subsp sinensis community in Hezuo,Gannan and Mati,Su'nan of Gansu Province,the Chinese seabuckthorn communities have been divided into nine phytocoenological types.The characteristics of floristic composition,life form,physiognomy and structure of Chinese seabuckthorn community have been analysed.The analysis show that Chinese seabuckthorn community is a temperate deciduous shrub and Chinese seabuckthorn is floristic compositions of transitional zone between forest and steppe.The relationship between H.rhamnoides subsp.sinensis population density and fruit yield were determined,the result make clear that the artificial seabuckthorn forest's sex ratio(F/M)would be best from 10: 1 to 5:1,besides,according to the ecological environment to decide the planting density.