摘要
采用增补和滤除掉部分自然UV-B辐射的模拟试验,研究了增强和近环境UV-B辐射对高寒草甸一年生牧草窄叶野豌豆生长和繁殖的影响.结果表明:增补UV-B辐射处理后,窄叶野豌豆的株高、生物量、分配向果实的生物量、总花数和种子百粒重均显著下降,花期延迟,开花集中度和繁殖成功率有所提高,而种子产量无显著变化.相对于减弱UV-B辐射处理,近环境UV-B辐射使窄叶野豌豆的株高先降后升,分配向果实的生物量减少,花期、花数和种子产量无显著变化,种子百粒重减小.增强和近环境UV-B辐射对窄叶野豌豆的生长和繁殖有一定的抑制作用,且增强UV-B辐射的影响更大.
A simulation experiment with supplementation and exclusion of solar uhraviolet-B （UV-B） radiation was conducted to study the effects of enhanced and near ambient UV-B radiation on the growth and reproduction of alpine annual pasture Vicia angustifolia on Qinghai-Tibet Plateau. Enhanced UV-B decreased the plant height and biomass, biomass allocation to fruit, flower num- ber, and lO0-seed mass significantly, delayed flowering stage, increased the concentration degree of flowering and success rate of reproduction, but had little effect on seed yield. Near ambient UV-B radiation made the plant height increased after an initial decrease, decreased biomass alloca- tion to fruit and lO0-seed mass, but little affected flowering duration, flower number, and seed yield. Both enhanced and near ambient UV-B radiation could inhibit the growth and production of V. angustifolia, and the effect of enhanced UV-B radiation was even larger.
出处
《应用生态学报》
CAS
CSCD
北大核心
2012年第5期1333-1338,共6页
Chinese Journal of Applied Ecology
基金
国家自然科学重大研究计划项目(90202009)
曲阜师范大学博士启动基金项目(Bsqd2007012)和曲阜师范大学校青年基金项目(XJ201106)资助
关键词
青藏高原
UV-B辐射
窄叶野豌豆
生物量
开花物候
种子产量
Qinghai-Tibet Plateau
UV-B radiation
Vicia angustifolia
biomass
flowering phe-nology
seed yield.
