高温季节不同光照强度对冷季型草坪草坪用性状的影响  

The effects of different light intensities on turf characteristics of cool season turfgrasses in the hot season

作　　者：杨志民[1] 何霞[2] 韩烈保[1] 

机构地区：[1]北京林业大学草坪研究所,北京100083 [2]南京农业大学园艺学院,江苏南京210095

出　　处：《草业学报》2007年第5期48-55,共8页Acta Prataculturae Sinica

摘　　要：在夏季炎热高湿的南京地区,研究自然光照、轻度遮荫、中度遮荫和重度遮荫4种光照强度对高羊茅、草地早熟禾和匍茎翦股颖生长特性和生理指标的影响。结果表明,高羊茅和草地早熟禾叶片宽度随遮荫的加剧均变窄,且中度遮荫与自然光照存在显著差异,而匍茎翦股颖在7和8月,中度遮荫处理的叶片宽度明显比自然光照和轻度遮荫处理的宽。不同光照强度对3种草坪草的生长速率产生不同影响,在5-7月随遮荫的加剧,3种草坪草的生长速率均有明显增加。3种草坪草的叶绿素和蛋白质含量随光照不同发生变化,在7月,3种草坪草中度遮荫处理的叶绿素含量明显高于自然光照处理,在6和9月,3种草坪草中度遮荫处理的蛋白质含量比自然光照处理的明显降低。光照强度对3种草坪草的超氧化物歧化酶活性、过氧化物酶活性和丙二醛含量产生影响。The vegetative character and physiological index of three cool-season turfgrasses （Festuca arundinacea, Poa pratensis and Agrostis stolonifera） were researched under natural lighting, slight shading, medium shading and heavy shading （90μmol/m^2·s^2） in the hot and humid Nanjing area. The three turfgrasses with- ered under heavy lighting with the leaves of F. arundinacea and P. pratensis becoming narrow while those of A. stolonifera became broad in July and August. The rates of growth of the three turfgrasses were different under the natural lighting, slight shading and medium shading treatments. The growth rates of the three turfgrasses increased from May to July. The chlorolphyll and protein content changed as light intensity decreased. The chlorolphyll contents of the three turfgrass species under medium shading were higher than those under natural lighting in July. The protein content of the three turfgrasses under medium shading was lower than that under natural lighting in June and September. The light intensity affected MDA content, activity of SOD and POD of all three cool-season turfgrasses.

关 键 词：草坪草 高羊茅 草地早熟禾 匍茎翦股颖 光照强度 

分 类 号：S688.4[农业科学—观赏园艺] Q945.11[农业科学—园艺学]