云南石林地区喀斯特山地萌生团花新木姜子年轮特征与环境因子的关系

Neolitsea homilantha’s tree-ring characteristics and its relationship with environment factors in Shilin karst region, Yunnan Province

关键词:  年轮宽度  年轮指数  环境因子  喀斯特  团花新木姜子

Key words:  Tree-ring width  tree-ring index  environmental factors  karst   Neolitsea homilantha

摘要:

树木年轮记录着树木生长过程中气候和环境因子的变化。该文采用树木年轮分析方法研究云南石林地区萌生生长的团花新木姜子树干年轮特征与环境因子之间的相互关系。结果表明:团花新木姜子萌生个体具有显著的差异性; 其不同样树之间年轮宽度和年轮指数变化幅度较大,随着基径的增大,年轮指数与年轮宽度也逐渐增大; 年轮指数与雨季降水呈正相关,而与干季降水和5、6、11和12月的温度呈负相关,但相关性均未达到显著水平。这表明退化迹地上萌生生长的团花新木姜子个体对降水和温度年间变化有较强适应能力和个体调节能力。

Abstract:

Tree-ring records changes of climate and environmental factors in the process of growth. Some plants can survive over the rocky desertification process own to their sprouting ability. Tree ring of Neolitsea homilantha in Shilin karst region. The relationship between sprouter growth and environment factors were investigated in Yunnan Province. The results were as follows: Individuals of N. homilantha was significantly different from each other; The ring width and ring index of N. homilantha had large variations between different sample trees,and the ring width and ring index were increased in association with basal diameter increases; The ring index of N. homilantha was positively correlated with precipitation of the rain season,while it was negatively correlated with precipitation of the dry season,and it was also negatively correlated with temperature of May,June,November and December. But all of the relationships were not statistically significant. These results indicated that the sprouters of N. homilantha had high capability to adapt to the rain and temperature variation,and thus tenaciously survive in the rocky desertification area.