西南林业大学学报2016，Vol.36Issue(6)：29-33,5.DOI:10.11929/j.issn.2095-1914.2016.06.005
旱地油杉种子形态及散布特征研究
Studies on the Morphological and Dispersing Characters of the Seeds of Keteleeria xerophila
摘要
Abstract
The species Keteleeria xerophila belonging to the family Pinaceae, is endangered and mostly distrib-uted in a very narrow area, Yunnan. At present, the populations of the species are rare. In order to discuss the rela-tionship between the endangering mechanisms and the characteristics of seed morphology and dispersal, the mor-phological variation and 11 dispersing characteristics of seeds were studied. The results showed that the order of seed variation was: the percentage of weight of seed wing﹥the weight of seed﹥the total weight of seed﹥the weight of seed wing﹥the ratio of length and width of seed wing﹥the width of seed﹥the length of seed wing﹥the length of seed﹥the percentage of length of seed wing﹥the width of seed wing﹥the total length of seed. The rela-tion between several morphological characters of seeds was extremely significant positive correlation. The hovering time was comprehensively influenced by the various characters of seeds and has an extremely significant negative correlation with the total weight of seed, the weight of seed and the weight of seed wing, the correlation coefficient was -0. 641,-0. 637 and-0. 441, respectively. The hovering time has an extremely significant positive correlation with the percentage of weight of seed wing, and the correlation coefficient was 0. 577. The seed morphology of K. xerophila was relatively stable and adapted to disperse for a long distance, but the natural regeneration ability of population was weak, which was one of the important reasons for being endangered.关键词
旱地油杉/种子/形态特征/散布特征Key words
Keteleeria xerophila/seed/morphological character/dispersing character分类
农业科技引用本文复制引用
牟凤娟,段胜芝,字雪松,李一果..旱地油杉种子形态及散布特征研究[J].西南林业大学学报,2016,36(6):29-33,5.基金项目
云南省教育厅重点项目(2012Z07)资助. （2012Z07）
