摘要
[目的]探讨短穗兔耳草个体对模拟增温的响应。[方法]采用国际冻原计划(ITEX)模拟增温对植物影响的研究方法,将温棚从小到大的顺序依次设为A、B、C、D、E5个温度梯度,分析不同温度梯度下短穗兔耳草个体生长特征的变化,研究模拟增温对短穗兔耳草生长特征的影响。[结果]随着温棚直径的减小,温度(地表温度和土壤温长)逐渐升高。与对照相比,A、B、C、D、E5个处理分别提高了2.68、1.57、1.20、1.07和0.69℃(地表气温),1.74、1.06、0.80、0.60和0.30℃(土壤温度)。短穗兔耳草从对照至A温室随着温度的升高,叶片数、叶片高度逐渐增加,而匍匐茎逐渐减少。[结论]叶片数变化与温度(地表温度和地温)呈正相关关系,增温促进了短穗兔耳草的营养生长,抑制了它的克隆繁殖能力。
[Objective] The purpose was to discuss the response of Lagotis brachystachya individual to simulated warming.[Method] With the research method of the influence of simulated warming on plant in International Tundra Experiment（ITEX）,according to the glasshouse sizes,the glasshouses were designed from the small to the big as 5 temperature grads of A,B,C,D and E,so as to analyze the growth characteristic change of L.brachystachya individual and study the effect of simulated warming on the growth characteristic of L.brachystachya.[Result] The temperature（surface and soil temperature） increased gradually as long as the glasshouse diameter reduced.Compared with the control,the temperatures in 5 treatments of A,B,C,D,E was increased by 2.68,1.57,1.20,1.07 and 0.69 ℃（surface temperature） and 1.74,1.06,0.80,0.60 and 0.30 ℃（soil temperature） resp.The leaf number and leaf height of L.brachystachya increased gradually,but the stolons decreased gradually with the increment of temperature in the glasshouses from CK to
A.[Conclusion] The change of leaf number showed positive correlation with the temperature（surface and soil temperature）.Warming promoted the vegetative growth of L.brachystachya,but restrained its propagation ability of clone.
出处
《安徽农业科学》
CAS
北大核心
2007年第36期11826-11828,共3页
Journal of Anhui Agricultural Sciences
基金
国家"十五"重大科技攻关项目(2001BA606A-02)
关键词
短穗兔耳草
模拟增温
生长特征
Lagotis brachystachya
Simulated warming
Growth characteristic
