摘要
研究了草原火烧后植物群落生产及其产量空间结构的变化．结果表明，草原春季火烧后，由于当年降水充分，火烧地植物群落产量提高；第二年降水不足，火烧地植物群落产量低于未烧地．火烧地植物群落地上生产量的绝对增长率高于未烧地．火烧地植物群落的截茎质量、截叶质量等高于未烧地．火烧地植物群落地下生物量在火烧后当年升高，第二年降低．
Changes of plant community production and the space structure following grassland burning were studied in Hulunber steppe. After grassland burning in spring, the production of plant community in burned site increased due to rich precipitation in the first year, and decreased due to short precipitation in the second year. The absolute growth rate of plant community's aboveground production in burned site was higher than that in unburned site. Following burning, the stem and leave mass of the plant community in burned site exceeded that in unburned site. The underground biomass of the plant community in burned site increased in the first year of burning, and decreased in the second year of burning.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
1999年第4期83-90,共8页
Journal of Northeast Normal University(Natural Science Edition)
基金
农业部"九五"重点科技
关键词
草原
火烧
空间结构
地下生物量
植物群落
grassland
burning
production
space structure
underground biomass
