闽北乌桕经济性状的差异性

Difference of economic traits of Sapium sebiferum in northern Fujian,China

通过对闽北8个县(市、区)乌桕性状调查与分析,结果表明,不同产地乌桕在单位面积种子产量、单序果数、千粒重、种子皮油率、种子梓油率、种子含油率和单位面积产油量等经济性状上存在极显著差异;单位面积种子产量与单序果数、千粒重密切相关,与土壤速效P、K含量有一定的相关性,与年降水、年均温无明显相关;种子含油率与土壤养分、年降水、年均温之间均无明显相关。通过聚类分析,根据单位面积种子产量、单位面积产油量、单序果数、千粒重和种子含油率等5个经济性状的综合表现,按相关系数0.700 0的相似性,将闽北8个乌桕主要产地划分为4个水平。

Investigation of the characters and the results of Sapium sebiferum showed that there were very significant differences of economic traits in seed production, per-cob fruit integer, thousand grain weight, oil production of seed, oil production per square meter at eight counties （districts） in northern Fujian. The seed yield per unit area was closely related to per-cob fruit integer and thousand grain weight, and was a certain correlation with available soil phosphorus and potassium, but not with annual average precipitation and temperature. The oil production of seed was not related to soil nutrients, annual average precipitation and temperature. Based on comprehensive performance of five economic traits of seed production, oil production, per-cob fruit integer, thousand grain weight and oil production of seed, the main origin of S. sebiferum in Nanping area has been divided into four levels with the method of cluster analysis according to the similarity with the value of 0.700 0.