不同基质对无柄小叶榕容器苗生长和叶片生理特性的影响  

Effects of Different Media on Growth and Leaf Physiological Characteristics of Ficus concinna var. subsessilis Container Seedlings

作　　者：林霞[1,2] 郑坚[2] 刘洪见[2] 钱仁卷[2] 王金旺[2] 

机构地区：[1]北京林业大学,北京100083 [2]浙江省亚热带作物研究所,温州325005

出　　处：《林业科学》2010年第8期62-70,共9页Scientia Silvae Sinicae

基　　金：浙江省成果转化项目(2007D70061);温州市重点科技计划研究项目(N2005A01)

摘　　要：以珍珠岩、锯屑、稻谷壳和泥炭土为材料,采用单形重心混料试验设计方法设计14种轻型基质配方。以常规基质为对照,研究这14种基质对无柄小叶榕容器苗的生长和叶片生理特性的影响。结果表明:不同基质配方对容器苗的生长和叶片生理特性有显著影响,5,6和8号基质容器苗的生长极显著优于常规基质容器苗,而3,12和14号基质容器苗的生长则极显著差于对照。5,6和8号基质容器苗叶片叶绿素含量和净光合速率显著高于对照,3,12和14号基质容器苗的类胡萝卜素含量和净光合速率显著低于对照,此外,3,12和14号基质容器苗O2·-产生速率明显高于对照。3,12和14号基质容器苗较低的光合性能是由于光合色素合成不足和光合机构活性较低所导致。光合机构中过剩激发能不能通过非辐射能的形式有效地耗散掉,诱导了O2·-生成,引起膜脂过氧化加剧而使光合机构受到损伤,加剧其光合速率的降低。不同基质中无柄小叶榕容器苗的生长和叶片生理特性分析表明:5,6和8号基质为无柄小叶榕容器育苗的优良轻型培养基质,对无柄小叶榕的容器苗生产具有重要意义。Fourteen kinds of light-medium were produced using the pearlite,sawdust,peat soil and corn shell as material with the simplex centroid mixture design. The growth （ height,basal diameter,leaf number and biomass） and leaf physiological characteristics of the container seedlings were investigated to estimate the effect of the 14 media on Ficus concinna var. subsessilis,with a traditional medium served as the control. The results showed that the 14 media significantly influenced the growth and leaf physiological characteristics of the container seedlings. The growth of the seedlings in media No. 5,6 and 8 were significantly better than that in the traditional medium. However,the seedling growth in media No. 3,12 and 14 was opposite. The chlorophyll content and net photosynthetic rate （Pn） of the container seedlings in media No. 5,6 and 8 were significantly higher than the control,while the carotenoid,Pn and non- photochemical quenching of fluorescence of the ones in media No. 3,12 and 14 were significantly lower than the control. Moreover,the production rate of O 2·- of the seedlings in media No. 3,12 and 14 were significantly higher than the control. The decreased photosynthetic capacities were considered as a result of the deficiency of photosynthetic pigments and declined activity of photosynthetic apparatus. The excess excitation energies were not be safely dissipated by non-radiative energies,and induced the overproduction of O 2·- ,which caused membrane lipid peroxidation and damage of photosynthetic apparatus,and reduced the photosynthetic capacities of the seedlings. The analyses of the growth and leaf physiological characteristics of the container seedlings suggested that the media No. 5,6 and 8 are better light-medium than the other ones as the container nursery of F. concinna var. subsessilis.

关 键 词：基质 无柄小叶榕 容器苗 生理特性 光合作用 

分 类 号：S723.133[农业科学—林木遗传育种]