践踏填充废胶粒基质草坪黑麦草特征物质与光合性能  

Characteristic substances and photosynthetic characteristics of Lolium perenne L. with waste crumb rubber filled in turf medium under trample stress

作　　者：赵树兰[1] 多立安[1] 王礼莉[1] 高玉葆[1] 

机构地区：[1]天津师范大学化学与生命科学学院,天津300387

出　　处：《生态学报》2009年第4期1675-1681,共7页Acta Ecologica Sinica

基　　金：天津师范大学滨海新区专项研究计划资助项目(52LE19);天津市高等学校科技发展基金资助项目(20040716);国家自然科学基金资助项目(59878033)

摘　　要：通过践踏胁迫基质填充废胶粒草坪,研究了黑麦草粗纤维、可溶性糖、叶绿素、气孔导度、细胞间CO2浓度、净光合速率及蒸腾速率等指标,结果表明:基质填充不同粒径胶粒草坪践踏后,1～2mm粒径处理黑麦草粗纤维含量低于2～4mm和4～6mm处理,对照为最高。叶绿素含量差异较为明显,其大小顺序为1～2mm>2～4mm>4～6mm>对照。可溶性糖含量差异显著,其中1～2mm粒径处理为最高,然后依次为2～4mm、4～6mm及对照。净光合速率以1～2mm处理最大,对照最小,二者差异显著(P<0.05);气孔导度的变化幅度也以1～2mm为最大,其细胞间CO2浓度则明显降低,表明1～2mm粒径胶粒基质体系的光合能力比其它处理都强。综合分析说明,草坪基质填充废胶粒的粒径与草坪耐践踏性具有相关性,在本研究中基质填充1～2mm粒径胶粒的草坪耐践踏性能要明显优于其它2个处理。A field experiment was performed to investigate responses of crude fibre,soluble sugar,chlorophyll content,stomatal conductance（Gs）,intercellular CO2 concentration（Ci）,net photosynthetic rate（Pn）and transpiration rate（Tr）of Lolium perenne to trample stress under conditions of waste crumb rubber with different sizes being filled in turf medium.The results showed that under trample stress,Lolium perenne with 1-2 mm crumb rubber in medium had lower crude fibre content than that with 2-4 mm and 4-6 mm,while the control had the highest crude fibre content.Chlorophyll content differed markedly among the treatments,decreased in the order of 1-2 mm〉2-4 mm〉4-6 mm〉control.Soluble sugar content of Lolium perenne was the greatest in the 1-2 mm treatment,followed by 2-4 mm,4-6 mm treatments and control.The net photosynthetic rate（Pn）and stomatal conductance（Gs）were improved with the addition of crumb rubber,and they all reached the maximum in the 1-2 mm treatment.However,the intercellular CO2 concentration（Ci）decreased substantially.This indicates that turf medium filled with 1-2 mm crumb rubber has higher photosynthetic ability than other treatments.Based on the above analyses,the size of crumb rubber filled in turf medium was found to be correlated with trample resistance of turf.In the present study,turf medium filled with 1-2 mm crumb rubber was higher in trample resistance than that filled with 2-4 mm and 4-6 mm.

关 键 词：践踏胁迫 废胶粒 草坪基质 黑麦草 特征物质 光合性能 

分 类 号：S688.4[农业科学—观赏园艺]