Fruit characteristics of Castanopsis fargesii in different habitats
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摘要: 在植物的生活史中, 种子大小及其变化不仅涉及到植物生长过程中的生殖分配, 而且是植物种的重要适应特征。从果实高度、宽度、高宽比及果实质量等4 个指标对浙江省天童国家森林公园内的常绿阔叶树种栲树Castanopsis fargesii 的果实性状进行了研究和分析。结果表明:不同生境中栲树果实性状有较大变化, 其中木荷-栲树Schima superba-Castanopsis fargesii群落生境中的栲树果实质量最大[ (0.725 0.19)g] , 其变异幅度也较大(26.21 %), 与其他生境条件中的有明显的差异(P 0.01);该生境中的栲树果实高度和宽度也较大, 分别为(1.16 0.11)cm 和(0.999 0.12) cm 。栲树果实的质量与其宽度和高度有明显的相关关系:m =-1.480 +0.748b宽度+1.294h高度(P 0.05), 但栲树果实性状与母株的株高和胸径之间没有相关关系(P 0.05)。连续2 a 间, 栲树果实性状也有明显差异(P 0.01), 种子产量较高的2000 年的果实性状比1999 年的大。栲树果实性状的变异可能与不同生境下种群采取的更新策略有关。图3 表4 参30Abstract: The seed size and its varation not only involve reproductive pattern of plant but also is an imortant trait of adaptation during plant life history .The fruit characteristics of evergreen broad-leaved species-Castanopsis fargessi Franch .in Tiantong National Forest Park (TNFP) are studied and analyzed with four indexes including fruit weight , height , width and ratio of fruit height to width were studied .The results show that there are significant differences among the fruit weight from the different habitats (P 0.01).The heaviest fruit is collected from Schima superba-Castanopsis fargesii community [ (0.725 0.19)g] .The fruit is also the highest and widest and its height and width are (0.999 0.12)cm and (1.16 0.11)cm respectively .The fruit weight (m) is significantly related to its height (h)and width (b).m =-1.480 +0.748b +1.294 h (P 0.05), but fruit characteristics have no correlation with the height and diameter of the tree (P 0.05).The results also show there is a significant difference (P 0.01)among the fruit characteristics in the two consecutive years .The variation of characteristics of C .fargesii fruit may have correlation with the regeneration strategies adopted in different habitats .[ Ch , 3 fig .4 tab .30 ref .]
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Key words:
- Castanopsis fargesii /
- fruit /
- characteristics /
- Tiantong National Forest Park /
- habitat
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