不同光照条件对一串红“猩红皇后”幼苗生长的影响

Effect of Different Light Intensity on Seedling Growth of Salvia splendens

通过搭建黑色网纱对一串红新品种"猩红皇后"的幼苗进行了不同光照强度的试验。结果表明:不同光照条件对一串红幼苗的株高、地径、叶量、叶面积、茎叶及根系的鲜干重有不同影响,遮光率为60%左右有利于幼苗的株高、地径、叶片数、叶面积的增长,也有利于根系的生长;遮光率为90%以上对幼苗生长有负作用;不同遮光处理对幼苗生长的影响发生明显变化在1周以后,18 d后60%遮光处理组与70%相比生长优势明显。

We set up black meshes on the new variety of Salvia splendens ＂Scarlet Queen＂ seedlings to light intensity test.The results showed that in different light conditions seedling height,diameter,leaf weight,leaf area,root fresh weight,dry weight had different effects.When shading rate was about 60% it is good for seedlings not only for the height,diameter,leaf number,leaf area growth but also root growth.However above 90% shading rate,were not suitable for seedling growth,it will be negative effect for seedings.The obvious change of different shade rate was in one week later.The superiority in 60% shading rate appear in eighteen days later compare with 70% shading rate.