Evolution of vegetation and climate environment since 10kaBP in Fuping,Shaanxi

In this study,the sporopollen diagram was divided into three different zones based on geological investigation,thirty-one intensive samples,sporopollen analysis at cross section of Shaanxi-Fuping in the middle of loess Plateau and the evolution stages of vegetation and climate environment on Holocene of the studied area.These three zones represent early,middle and later period respectively.The first zone is a combinatorial zone of Pinus-Compositae-Typha with the characteristics of predominant herbaceous plant pollen and high conifer pollen. The second zone is a combinatorial zone of Pinus-Quercus-Artemisia-Concentricystes,which is characterized by the increase of arbor pollen and the decrease of herbaceous pollen.The third zone named as a combinatorial zone of Quercus-Pinus-Artemisia is marked by the increase of herbal pollen and the decrease of arbor pollen.The study result indicates that the vegetation of early Holocene was forest grassland - dry grassland,the climate was dry and cool - dry and cold.In middle Holocene,the vegetation was forest grassland,aciculignosa and aeslilignosa grassland, the climate was warm and wet.In late Holocene,the vegetation was forest grassland,the climate was droughty and warm - warm,cool and droughty.