广西珍贵乡土速生树种任豆苗木生长节律研究  

Study on Seedling Growth Rhythm of Zenia insignis as Valuable Fast-Growing Native Tree Species in Guangxi

作　　者：黄志玲[1] 庞世龙[1] 郝海坤[1] 彭玉华[1] 韦晓娟[1] 

机构地区：[1]广西林业科学研究院,广西南宁530002

出　　处：《西南林学院学报》2011年第6期6-9,共4页Journal of Southwest Forestry College

基　　金：广西林业科学研究院基本科研业务费项目(林科200805号);(林科200803号)资助

摘　　要：利用Logistic方程对任豆1年生播种苗的苗高、地径年生长节律进行拟合,并根据因素数列几何形状发展态势的接近程度,将苗木的生长量与影响苗木生长的气象因子空气温度、空气相对湿度、降水量和日照时数组成一个灰色系统,进行面积关联度分析。结果表明:Logistic方程拟合效果显著,年生长量表现出明显的"慢—快—慢—快—慢"的节律,采用有序样本聚类分析方法将苗木的生长过程划分为出苗期、生长前期、速生期和生长后期4个时期。关联度分析表明,空气温度对苗木的高生长影响最大,相对湿度影响最小;而日照时数对苗木的粗生长影响最大,相对湿度影响最小。A logistic equation was formulated to describe the height and annual Zenia insignis seedlings from seed germination to the end of the first basal diameter growth dynamics of the growing season. An area correlation a- nalysis was done according to the closeness of the observed parameters to the dynamic curve on the gray system composed of the seedling growth increment and the meteorological factors including aerial temperature, relative hu- midity, rainfall and solar radiation hours that influence upon the ling response fitted the logistic equation quite well, the annual seedling growth. The results showed that the seed- increment displayed a distinct alternation of ＇ slow-fast-slow-fast-slow＇ rhythm. The yearly growth course of the seedlings might be partitioned into four periods of time by the sequential clustering analysis, i. e. , the emergence stage, pre-growth stage, fast-growing stage and the post-growth stage. The gray correlation analysis revealed that air while relative humidity had the least impact on height growth of the temperature had the most significant influence seedlings. The number of hours of solar radia- tion had the greatest influence among the major meteorological factors on the diameter growth. Similarly, relative humidity did the least contribution to the diameter growth.

关 键 词：任豆 LOGISTIC方程 有序聚类法 年生长规律 灰色关联度 

分 类 号：S723.1[农业科学—林木遗传育种]