5种龙船花叶功能性状研究

Study on Leaf Functional Characteristics of Five Ixora Varieties

为了解5个龙船花品种的叶片功能性状特征,对其叶形指数、比叶面积、叶干物质含量和叶片SPAD值等特征进行了测量。结果表明,叶形指数在龙船花品种间存在显著差异,在品种内具有相对的同一性和稳定性,可作为龙船花品种的鉴别依据之一;叶片SPAD值与比叶面积、叶片干物质含量间的相关性不显著,且存在品种间差异;比叶面积和叶片干物质含量间均呈极显著负相关关系;依据比叶面积大小排序得知,5种龙船花的生产力和截获光的能力大小排序为黄花龙船花>龙船花>密花龙船花>黑猫龙船花>宫粉龙船花。

To compare the leaf functional characteristics of five Ixora varieties, their leaf index, specific leaf area, leaf dry matter con- tent and leaf SPAD value were studied in this paper. The results showed that the leaf index was different significantly among Ixora va- rieties, but selfsame relatively inside the same variety. The result showed that the Ixora varieties could be identified by leaf index. The relationship between leaf SPAD value and specific leaf area, leaf dry matter content were not significant, and different among varieties. of all the varieties, there was significantly negative correlation between specific leaf area and leaf dry matter content. According to the study results of specific leaf area, the productivity and the ability to intercept light of five lxora varieties, Ixora coccimea JLutea＇, Ixora chinensis, Ixora hybrid ＂Jacquline＇, Ixora hybrid ＂Maui＂ and lxora x westi was decreasing.