不同光照率对飞机草生长的影响

Effects of Different Illumination on Eupatorium odoratum Growth

[目的]研究不同光照率对飞机草生长的影响。[方法]以飞机草为研究对象,在田间测定了不同光照率对其主茎生长高度、主茎叶片数和鲜干重的影响。[结果]适宜的遮阴处理在一定的时间内有助于飞机草株高的增长,但不利于其生物量的积累。光照率越高越有利于飞机草茎叶和根干重的增加。不同光照率处理飞机草的最终高度、叶片数和干重的大小顺序依次是:光照率100%>光照率38%>光照率16%>光照率3%。飞机草在光照率38%以下不能正常开花结果。[结论]对飞机草的防治与利用有重要的意义。

[ Objective ] The research aimed to study the effects of different illumination on Eupatoriurn odoratum growth. [ Method ] The main stem height, main stem leaf number and fresh and dry weight of Eupatorium odoratum were measured in different light intensity in the field. [ Result] The results showed that appropriate shade at a certain period was advantage to the plant high growth ofEupatorium odoratum, but not to its biomass accumulation. The higher in percentage of light, the better for increase of Eupatorium odoratum stem, leaf and root dry weight. The order of height, leaf number and dry weight of Eupatorium odoratum under different illumination treatments was： 100% illumination 〉 38% illumination 〉 16% illumination 〉 3% illumination. Eupatorium odoratum could not flower normally when illumination was less than 38%. Light intensity should impact the invasion of Eupatorium odoratum. [ Conclusion] This research has important significance for control and utilization of Eupatorium odoratum.