两种林龄文冠果的生长和结实特性

Growth and fruiting characteristics of two age Xanthoceras sorbifolia Bunge trees

采用野外观测和实验室分析相结合的方法,分析了8年生和50年生文冠果的生长和结实特性.结果表明,前者的单株结实数、果实纵横径和种子千粒重均明显大于后者,而单果种子数在两者间无显著性差异;8年生文冠果2年生枝花总数是50年生文冠果的1.66倍,两者差异极显著(P<0.01),雌花比例在2种林龄文冠果间无显著差异,而后者的座果率显著高于前者(P<0.05);8年生文冠果春梢生长量明显大于50年生文冠果.两者在生长和结实方面均有明显的差异,这可能与土壤可供有效养分有关.

The growth and fruiting characteristics of two age X.sorbifolia bunge trees were studied with field observation and indoor experiment.The results showed that the number of fruit-setting per tree,the longitudinal and transverse diameter,and the thousand-seed weight of 8-year-old trees were all obviously larger than those of 50-year-old trees.The difference between the two age trees in the number of seeds per fruit was not significant（P0.05）.The total flower amounts of the young trees were 1.66 times amounts of the old trees.There was no significant difference in the proportion of female flowers between the two age trees,but the fruit setting rate of the old trees was significantly higher.The spring shoot increment of the young trees was obviously larger than that of the old trees.On the whole,there were significant differences in the growth and fruiting index between the two age trees,which was related to available nutrients in soil.