留芽数对观赏芍药分株苗生长及光合特性的影响  

Effect of the number of bud on the growth and photosynthetic characteristic of peony divided plants

作　　者：宋焕芝[1,2] 王琪[1] 于晓南[1,3] 

机构地区：[1]北京林业大学园林学院,北京100083 [2]北京欧亚联合城市规划设计院有限公司,北京100037 [3]国家花卉工程技术中心,北京100083

出　　处：《湖南农业大学学报（自然科学版）》2013年第5期524-528,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家"十二.五"科技支撑项目(20113AD12B02)

摘　　要：为探寻不同留芽数对芍药分株苗的生长及光合特性的影响,以国际切花市场流行的芍药品种‘Sarah Bernhardt’一年生分株苗为试验材料,按留芽数将其划分为3个等级:一级(留芽数大于或等于5个)、二级(留芽数3～4个)、三级(留芽数1～2个),对各级分株苗形态指标及光合特性进行比较分析。结果表明:二级分株苗长势最佳,日净光合速率值较高,光饱和点与光补偿点分别为21、1 056μmol/(m2·s);就叶绿素含量(叶绿素a、b含量分别记作chla、chlb)而言,二级分株苗的chla/chlb值最高,其chla、chlb及chla+chlb值也较高,表明二级分株苗对弱光的利用效率较高。Division propagation is one of the main breeding methods for peony. Bud number of the divided plants plays an important role on the growth of peony. To provide a theoretical basis for peony separated plants with different numbers of buds, the growth and photosynthetic characteristic of peony cultivar ＇Sarah Bernhardt＇ were studied. These plants were divided into three levels according to their bud numbers： more than 5 buds on per root was the first level; 3 to 4 buds was the second level; and 1-2 buds belonged to the third level The results showed that plants divided in the second level grew best with the widest stems and crown ranges. The net photosynthetic rate（Pn） was also the highest. The light compensation point（LCP） and light saturation point（LSP） content of chlorophyll（chla, chlb）, chla/chlb of plants in the were 21 and 1 056 μmol/（m2·s） respectively. As to the second level was in the highest and the values of chla, chlb, chla＋chlb were also higher than other levels.

关 键 词：芍药 分株苗 留芽数 光合特性 

分 类 号：S682.12[农业科学—观赏园艺]