摘要
幼苗阶段是植物种群生活史中亏损最严重的时期之一。通过干旱处理和去叶试验研究了辽东栎幼苗的生态反应。结果表明 :( 1 )干旱处理显著降低了单叶面积、叶面积比和叶比重 ,从而也降低了单株生物量 ,但根比重却较对照组有显著上升 ;( 2 )去叶显著提高了单株叶数、叶面积比和叶比重 ,尽管单株生物量只稍高于对照组 ,这说明辽东栎在去叶后有一定的补偿能力。
Plants suffer high mortality in the seedling stage of life history.The experiments of drought and simulated defoliation were conducted to examine the ecological responses of seedlings in Quercus liaotungensis. The results showed that(1)drought significantly decreased the single leaf area,leaf area ratio,leaf weight ratio,and individual biomass of seedlings.The root weight ratio was significantly higher than the control;(2)the number of leaves,leaf area ratio and leaf weight ratio were significantly higher than the control.We suggest that the seedlings of Quercus liaotungensis have the ability to compensate after defoliation.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第5期893-897,共5页
Acta Ecologica Sinica
基金
中国科学院重点资助项目!( KZ951 -SI-2 1 )
关键词
辽东栎
幼苗
干旱
去叶
生态反应
Quercus liaotungensis
seedling
drought
defoliation
ecological response
