井冈山地区荞麦叶大百合野生种群分布及其生长动态

荞麦叶大百合为国家二级重点保护植物,野生资源较为匮乏。为评估其在井冈山地区的分布情况,探明野生种群生长动态,通过实地踏查的方式对井冈山区域的荞麦叶大百合野生资源进行调查,调查结果表明：（1）在荆竹山、上井、百竹园、大窝里和寨子里发现荞麦叶大百合野生种群,海拔分布范围在840 ~ 1130 m之间,种群大小为荆竹山＞上井＞百竹园＞大窝里＞寨子里;（2）荞麦叶大百合为林下植物,主要分布在林缘、林窗等区域,周边伴生植物以草本为主,是所在群落的优势种;（3）荆竹山种群的荞麦叶大百合长势最好,上井种群长势最差;（4）荞麦叶大百合种群大小与海拔呈现显著正向关;繁殖生长期荞麦叶大百合株高、鳞茎重量与pH值显著负相关、与湿度显著正相关。

POPULATION DISTRIBUTION AND GROWTH DYNAMICS OF WILD PLANT OF CARDIOCRINUM CATHAYANUM IN JINGGANGSHAN MOUNTAIN

Cardiocrinum cathayanum is a national second-class key protective plant, and its wild resources are scarce. In order to assess its distribution and investigate the growth dynamics of wild populations, we investigated the wild resources in the Jinggangshan mountain. The result showed that: (1) the wild populations were found in Jingzhushan, Shangjing, Baizhuyuan, Dawoli and Zhaizili, with an altitude range of 840 ~ 1130 m, and the population size was Jingzhushan > Shangjing > Baizhuyuan > Dawoli > Zhaizili; (2) It was an understory plant, which mainly distributes in the forest margin, forest window areas, and the surrounding plants were mainly herbaceous, which was the dominant species of the community; (3) The growth of C. cathayanum was the best in Jingzhushan population and the worst in Shangjing population; (4) There was a significant positive correlation between the population size and altitude, the plant height and bulb weight were negatively correlated with pH values and positively correlated with humidity in the reproductive stage.