摘要： 采用Li-6400便携式光合测定仪测定了生长在常用无土栽培基质(C)和新型泥炭替代基质(A)中百合Sor-bonne叶片的光合日变化和光响应曲线及相关叶片质量参数。栽培于这2种基质中的百合Sorbonne叶片净光合速率日变化呈现一致的单峰曲线,且峰值出现在9:00。两种基质中生长的百合叶片光响应曲线近似一致,替代基质和常用基质中叶片的光补偿点分别是12,20μmol/(m².s);光饱和点分别为272,242μmol/(m².s);最大净光合速率分别为5.95,5.77μmol/(m².s);暗呼吸速率分别为0.247 4,0.537 2μmol/(m².s),且栽培于替代基质中的叶片在光饱和点272～1 000μmol/(m².s)范围的Pn基本稳定在Pn-max附近,说明新型基质中生长的百合Sorbonne具有较广泛的光适应性,其利用强光和弱光的能力较强,因此,使用新型泥炭替代基质种植百合Sorbonne是可行的。

关键词: 百合索蚌, 日变化, 光响应, 常用无土栽培基质, 新型泥炭替代基质

Abstract: The photosynthetic Diurnal,light-response curves and the related leaf parameters of Lilium Sorbonne planted in common soilless culture medium(C) and peat alternative medium(A) were measured using a Li-6400 portable photosynthesis system.The leaf net photosynthetic rate(Pn) of Lilium Sorbonne′ grown both of the media showed a single peak curve,and the peak appeared at 9:00 am.The photosynthetic light-response curves were approximately the same in the plants grown in different substrates,while the light compensation points of plants in A and C were respectively 12 and 20 μmol/(m²·s),the light saturation points were 272 and 242 μmol/(m²·s) respectively,the Pm were 5.95,5.77 μmol/(m²·s) respectively,and dark respiration rates were 0.247 4,0.537 2 μmol/(m²·s) respectively.The Pn of plants cultivated in A in light intensity range of 272-1 000 μmol/(m²·s) kept stable around Pn-max,which indicated that the plants grown in substrate A had developed a much wider light range adaptation than those grown in substrates,and a higher capability of utilizing the high and low intensity of light.Therefore,the peat alternative medium can be used as substitute of common soilless culture medium in soilless culture of Lilium Sorbonne.

Key words: Lilium, Sorbonne, Diurnal photosynthesis, Light response, Common soilless culture medium, Peat alternative medium

中图分类号: 

• S513