摘要
目的分析黑麦草在不同光照时间下萌发、生长及抗性生理指标的变化,筛选黑麦草最适种植的光周期。方法应用水培法,设置7种光照时间,在Fytosys生长箱中进行黑麦草培养,观察生长状况并测定叶片可溶性糖含量。结果 (1)随着光照时间的延长,黑麦草的发芽势和发芽率升高,以光照时间/黑暗时间为22h/2h时最高,分别为32.75%和73.75%。发芽指数变化呈现先升高后降低的趋势,以光照时间/黑暗时间为22h/2h时最高,为84.44;(2)不同光照时间处理下,黑麦草的根长、芽长、根重和芽重达极显著差异,以18h/6h处理下的根长芽长最长、芽重值最高,分别为6.07cm,6.15cm和0.089 9g/10株;以16h/8h处理下的根重值最高,为0.060 3g/10株;(3)不同光照时间以18h/6h和16h/8h处理下的叶片可溶性糖含量最高;(4)黑麦草萌发、生长及叶片可溶性糖含量之间呈显著或极显著相关。结论光照时间以22h/2h处理下黑麦草萌发较好,以18h/6h下生长状况较好及可溶性糖含量较高,在以后的实际应用中可选择18h/6h光周期进行黑麦草的广泛种植。
Purposes-To screen the optimal photoperiod for planting Lolium perenne by analyzing the changes of germination, growth and physiological indexes of Lolium perenne under different light- ing time. Methods-The water culture method was used for observing the growth status of Loliurn pe- renne which was cultivated in Fytosys growth boxes under 7 different illumination time and determi- ning the soluble sugar content in its leaf. Results-（1） The germination vigor and germination rate of Lolium perenne increased with the extension of lighting time, and their maximums were 32.75% and 73.75%, respectively, when the lighting time/dark time was 22 h/2 h. The germination index was in-creased at first and then decreased, and the maximum was 84.44 when the lighting time/dark time was 22 h/2 h- （2） There was significant difference in root length and shoot length as well as root weight and shoot weight under different illumination time. Under 18 h/6 h treatment, there were lon- gest root height and shoot length as well as highest shoot weight, 6.07 cm, 6.15 cm and 0. 089 9 g/ 10plants, respectively. Under 16 h/8 h treatment, the root weight was the highest, that is, 0.060 3 g/10plants; （3） Under 18 h/6 h and 16 h/8 h treatments the soluble sugar content of leaves were the highest; （4） There were significant or extremely significant correlations among germination, growth and soluble sugar content of Lolium perenne under different lighting time treatments. Conclusions- The suitable germination lighting time of Lotium perenne was 22 h/2 h. There were better growth status and higher leaf water soluble sugar content under 18 h/6 h treatment. In the future practice, the 18 h/6 h photoperiod could be selected for the extensive planting of Lolium perenne.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2017年第4期54-58,共5页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
基金
宝鸡文理学院2016年大学生创新创业训练计划项目(201610721076)
宝鸡文理学院大学生科研项目(2016S032)
关键词
光照时间
黑麦草
可溶性糖
lighting time
Lolium perenne
soluble sugar
