生境和地理因子对樟树种子性状及结构模型的影响  

Influence of environments and geographies on properties and structures of Cinnamomum camphora seeds

作　　者：张雷[1] 金志农[2] 黎祖尧[1] 李晓霞[1] 李芳[1] 张艳华[1] 

机构地区：[1]江西农业大学,江西南昌330045 [2]南昌工程学院,江西南昌330099

出　　处：《中南林业科技大学学报》2017年第5期15-20,49,共7页Journal of Central South University of Forestry & Technology

基　　金：国家科技支撑计划项目(2012BAC11B02);江西省林业科技创新项目(201506)

摘　　要：为了揭示樟树种子的形态结构及生境和地理因子对种子性状和结构的影响,采集樟树主要分布区内7省41县(市)164棵樟树种子,调查每棵母树生长地的经纬度、海拔高度和生长环境,测量种子的长度、宽度、高度、体积、种皮厚度、千粒重和比重,通过SPSS17.0软件分析种子性状及与生境和地理因子间的相关性,并对种子结构进行多元线性回归分析。结果显示:(1)樟树种子的长度、宽度、高度、体积和千粒重之间相互均呈极显著正相关;比重与高度和千粒重之间极显著正相关,与长度和种皮厚度之间显著正相关。(2)对种子体积和千粒重影响最大的是种子宽度,其次是种子长度,种子高度对体积的影响比较小;经度和海拔对种子性状的影响较大,纬度和土层厚度相对较小;东部和中部地区的种子显著比西部地区的种子大而且重;海拔越高,种子比重越小;不同地域和生境中种子的结构模型差异较大,中部地区、海拔500 m以下或土层50 cm以上地段,种子的体积和千粒重与长度、宽度和高度均呈极显著线性回归关系;而在其他区域,与种子体积和千粒重有显著线性回归关系的形态指标各不相同,东部是种子长度和高度,南部是种子长度和宽度,西部是种子宽度,北部是种子宽度和高度,海拔500 m以上是种子宽度,土层50 cm以下是种子长度和高度。In order to understand the morphology of Cinnamomum camphora seeds and further reveal the effects of provenances and environments on seeds properties and structures, 164 trees located in 41 cities from seven provinces were studied, recorded each tree＇s latitude, longitude, altitude, and environment, then measured their seeds＇ length, width, height, volume, seed coat thickness, 1000-grain weight, and density, which are inputted to SPSS 17.0 to analyze the correlation between seeds properties and growing environments, and applied multiple-factor linear regression analysis on seeds structures. The results indicated that there is a very significarLt positive correlation among length, width, height, volume, and 1000-grain weight; meanwhile the density has a very significant positive correlation with height and 1000-grain weight, has a significant positive correlation with length and seed coat thickness. Regarding seeds volume and 1000-grain weight, the most influential factor is seed width, followed by seed length, while seed height doesn＇t affect them much. Longitude and altitude noticeably impact seeds properties, yet latitude and soil thickness do not. Seeds from east and central China are significantly larger and heavier than seeds from west China; seeds density decreases as altitude increases. Seeds structures varies under different geographies and environments, in central China, areas with altitude below 500 m, and areas with soil thickness greater than 50 cm, seeds volume and 1000-grain weight have a very significant linear regression with length, width, and height. While in other areas, factors having a very significant linear regression with seeds volume and 1000-grain weight differ： they are seeds length and height in the east, length and width in the south, width in the west, width and height in the north, width for areas with altitude above 500 re,length and height for areas with a soil thickness less than 50 cm.

关 键 词：樟树 种源地 生境因子 种子性状 结构模型 

分 类 号：S792.23[农业科学—林木遗传育种]