昆明引种地的元宝枫开花结实习性研究

以云南昆明地区引种栽培的元宝枫林为对象对其林木的开花结实习性进行了调查研究。结果表明,在昆明引种地元宝枫的花期主要集中在3月份;树冠东南西北4个方位的开花结实量基本无差异;上层树冠开花结实数是下层树冠开花结实数的3倍左右;结实数与开花数呈显著正相关,相关系数为0.642 8;从坐果到果实开始成熟期的落果率约为50%;果实各性状的株间变异特别大,变异系数8.20%~50.55%,但同一植株的果实形态和大小差异不大。

A Study on Flowering and Fruiting Characteristics of Acer truncatum in Introducing Site of Kunming

Taking the Acer truncatum trees cultivated in Kunming district of Yunnan province as the research targets,the flowering and fruiting characteristics of this species were studied.In Kunming,the flowering time of Acer truncatum tree was mainly distributed in March,there was no significant difference on the number of flower and fruit at east, west,south and north four orientations of the crown.More than 70 % flowers and fruits were distributed on the upper level branches and less than 30 % were on the lower branches.The number of flowers was positively correlated with the number of fruits,with the correlation coefficient of 0.642 8.The fruit drop rate from fruit setting to drop beginning was around 50 %.There was obvious variance on characters of fruits among trees,with the variance coefficient of 8.20 % ~ 50.55 %.The variance in the same tree was not significant.