摘要
本项研究采用国际冻原计划(ITEX)模拟增温对植物影响的研究方法,将温棚按从小到大的顺序依次设为A、B、C、D、E 5个温度梯度,主要从矮嵩草(Kobresia humilis)、黑褐苔草(Curex alrofuscu)(莎草科)无性繁殖方面探讨了它们对模拟增温的响应。研究结果表明:从对照至A温室随着温室的减小温度(地表温度和地温)逐渐升高,三年的平均温度在A温室中最大(11.9℃,11.7℃),在对照中最小(9.4℃,9.9℃);A温室平均温度(地表温度和地温)与对照相比平均升高了2004年(2.6℃,2.2℃)、2005年(2.2℃,2.1℃)、2006年(2.1℃,2.0℃)。莎草科植物(矮嵩草和黑褐苔草)对增温反应的总体变化趋势有所区别,矮嵩草的分蘖数和叶片数在E温室达到最大值,而生物量在C温室达到最大值;黑褐苔草的分蘖数在D温室达到最大值,生物量在A温室达到最大值。
Based on the International Tundra Experiment （ITEX） method, we established five different size of chambers as A, B, C, D , E and CK, and examined the simulating warming effects on clone growth of Kobresia humilis, Carex alrofusca. The main results were reported as follows： The temperature （surface and underground temperature） increased with the size of the chamber decreasing from CK to chamber A. The highest average temperature were 11.9 ℃, 11.7 ℃ in chamber A during expertemental period. The temperature was low- est in the CK which were 9.4℃, 9.9℃. Compared chamber A with the control, the temperatures increased during 2004（2.6℃ ,2.2℃ ）, 2005（2.2℃ ,2. 1℃ ） and 2006（2. 1℃ ,2.0℃ ）. The responses of the cyperaceous plants （Kobresia humilis. ＆ Carex alrofusca. ） to increasing temperature were non - consistent approximately. The tiller number and biomasses reached to the peak in different chambers. Chamber E had the highest tiller of the Kobresia humilis. , hut chamber C had the biggest biomass. The tiller number of the Carex alrofitsca reached to the largest in chamber D and the biomass reached to the peak in chamber A.
出处
《青海草业》
2007年第4期2-8,共7页
Qinghai Prataculture
基金
国家"十五"重大科技攻关项目(2001BA606A-02)
中国科学院"西部之光"人才培养计划项目(cjc050175)。
关键词
模拟增温
矮嵩草
黑褐苔草
Simulating warming
Kobresia humilis
Carex alrofusca.
