大小兴安岭高位泥炭孢粉纪录及泥炭发育和演替过程研究

根据３个高位泥炭剖面孢粉分析和＾１４Ｃ测年数据，以及植物残体、微量元素与营养元素等分析相互印证，揭示大小安岭分别５０００ａ Ｂ．Ｐ．和２７００ａ Ｂ．Ｐ．以来孢粉组合特征和植物群与气候演变过程。分析表明大小兴安岭高位泥炭形成了低、中和高位发育阶段的演变，大兴安岭高位泥形成晚于小兴安岭。１３００ａ Ｂ．Ｐ．大小兴安岭普遍发育高位泥炭。该区图强和汤北（９４－Ａ）高位泥炭剖面分别是大小兴安岭高位泥炭标准

STUDY ON RECORD OF SPORE-POLLEN IN HIGH MOOR PEAT AND DEVELOPMENT AND SUCCESSIVE PROCESS OF PEAT IN DA AND XIAO HINGGAN MOUNTAINS

The author revealed the associate features of spore-pollen and successive process of vegetation and climate in Da Hinggan and Xiao Hinggan mountains since 5000 a and 2700 a B. P. based on data analysis of spore-pollen in 3 profiles of high moor peat. It was divided into 2 periods, one is the period (5000-3000 a B. P. ) of the broad-leaved forest with predominate Betula of the temperate climate, the other is the period 3000 a B. P. -updata of conifer and broad-leaved forest with predominate Pi-nus koroiensis, Picea and Abies of cool temperate climate in the north part Xiao Hinggan mountains. Then climate developed from temperate and slight dry to cool and moist.Since 2700 a B. P. there had been the mixed conifer and broad-leaved forest with predominate Pinus sylvcsteris. Pinus pumlia and a few Betula and Corylus in 2300-1800 a B. P. , and conifer forest of cool temperate climate consisted of Larix, Picea, Abies and Pinus sylvestris and so on in 1800 a B. P. -update, in the north part of Da Hinggan Mountains. The period was controlled by cool and moist climate, in which the period of 1800 - 1300 a B. P. was lowest time in the temperature and permafrost frozen soil was distributed to the south.It shows that development of the high noor peat in Da Higgan and Xiao Hinggan mountains passed 3 periods from the low moor pent, middle moor peat to high moor peat. It has greatly and continuously been formed and developed in Sphagnum leat since 1300 a in Da and Xiao Hinggan mountains, through confirmation of fossil record of spore-pollen and vertical change of plant residues from peat profiles.