【摘要】 以肉豆蔻科风吹楠、大叶风吹楠、琴叶风吹楠和红光树的1年生幼苗为试材,对其生长量、叶片性状及光合特性进行了比较分析。结果表明:4种植物幼苗的苗高和地径差异均达到极显著水平,苗木生长排序依次为风吹楠>大叶风吹楠>琴叶风吹楠>红光树。4种幼苗的叶长、叶宽、叶面积、叶厚、比叶面积及叶脉密度在种间差异极显著,其中,按叶面积大小排序依次为大叶风吹楠>琴叶风吹楠>红光树>风吹楠,比叶面积大小排序依次为琴叶风吹楠>风吹楠>大叶风吹楠>红光树。大叶风吹楠净光合速率显著高于其他3个种,风吹楠和琴叶风吹楠相当,而红光树极显著小于其他3个种;红光树和风吹楠具有较高的光饱和点,较低的光补偿点,且红光树的瞬时水分利用效率较高,说明红光树对环境适应范围较宽,但其对应的净光合速率较低、叶片较少,植株生长矮小。大叶风吹楠和琴叶风吹楠的光饱和点相对较低,最大净光合速率和光补偿点较高,生长较快,对环境适应范围相对较窄。更多还原

【Abstract】 One-year-old seedlings of Horsfieldia glabra, Horsfieldia kingii, Horsfieldia pandurifolia and Knema furfuracea were used as test materials. The seedling growth, leaf traits and photosynthetic characteristics were measured and compared. The results show that the seedling height and ground diameter of 4 plant seedlings reach a very significant level, and the seedling growth order is Horsfieldia glabra> Horsfieldia kingii> Horsfieldia pandurifolia> Knema furfuracea. The leaf length, leaf width, leaf area, leaf thickness, specific leaf area and leaf vein density of the four seedlings are significantly different among species, and the order of leaf area is Horsfieldia kingii > Horsfieldia pandurifolia > Knema furfuracea > Horsfieldia glabra. And Sorting by the specific leaf area, it is as Horsfieldia pandurifolia > Horsfieldia glabra > Horsfieldia kingii > Knema furfuracea. Pnof Horsfieldia kingii is significantly higher than that of the other 3 species, Horsfieldia glabra and Horsfieldia pandurifolia is similarly moderate and Knema furfuracea is the lowest. Knema furfuracea and Horsfieldia glabra have higher LSP and lower LCP. And Knema furfuracea also shows higher instantaneous WUEi of indicating Knema furfuracea has a wider range of environmental adaptation. Simultaneously, Knema furfuracea shows lower corresponding net photosynthetic rate, less leaves and dwarfed growth. Horsfieldia kingii and Horsfieldia pandurifolia exhibit relatively lower LSP, higher(Pn, max) and LCP as well as faster growth, but its has a narrow range of environmental adaptation.更多还原