对全国 11 个省 16 个市(县)19 个鸡爪桕〔Sapium sebiferum (L .)Roxb.var. laxicarpum Hu〕种子样品进行分析,以探讨乌桕种子的外种皮、内种皮、种仁的比率及皮油、梓油的含量和种子总含油率、百粒重与纬度、经度、年积温和年降水量的相关性, 结果表明, 乌桕种子外种皮、种仁的比率和皮油含量与纬度、经度、年积温和年降水量呈正相关;梓油的含量与经度、年积温和年降水量呈正相关, 内种皮的比率与上述环境因子均呈负相关;种子的百粒重与经度和年积温呈正相关, 与纬度和年降水量的相关性不明显;种子的总含油量与经度、年积温及年降水量呈较明显的正相关, 而与纬度没有明显的正相关。
 

Based on a determination of 19 seed samples of Sapium sebiferum (L .)Roxb .var. laxicarpum Hu
collected from 16 counties in 11 provinces of China , the correlation of the ratio of outer coat , inner coat and kernel, the content of crust oil , kernel oil and total oil , the hundred-grain weight of seeds to four environmental factors including latitude , longitude , annual accumulated temperature and annual precipitation were analyzed .The ratio of outer coat in seeds has a positive relation to above environmental factors , the ratio of kernel and the content of crust oil in seeds are same as , which were in contrast with the inner coat .The content of kernel oil and the total content of oil have the positive relations to the longitude , annual accumulated temperature and annual precipitation .The hundred-grain weight has a positive correlation to longitude and annual accumulated temperature , but no significant correlation to latitude and annual precipitation .