Abstract:

The aim of this study was to estimate the carbon storage of natural grassland ecosystem and reveal the carbon sequestration capacity of different types of natural grasslands in Shanxi. Above ground living biomass, litter, semi-decomposed litter layer, underground biomass, and soil organic carbon density of four major types of natural grasslands, including warm temperate tussock, warm temperate shrub-tussock, temperate steppe, and upland meadow steppe in Shanxi province, were investigated. Our results showed that the carbon density of vegetation, soil organic matter and ecosystem were ranked as warm temperate shrub-tussock > upland meadow steppe > warm temperate tussock > temperate steppe. The average carbon density of grassland vegetation was 1759.07 g·m^-2.The average soil carbon density was 6307.22 g·m^-2, which accounted for about 78.19% of the whole ecosystem. Shanxi province grassland acre is 4.55×10⁶ hm², so the carbon storage of grassland ecosystem was 364.4 Tg.

Key words: Typical grassland, Natural grassland, Organic carbon density, Carbon distribution, Carbon storage

摘要：

通过对山西4种主要草地类型暖性草丛草地、暖性灌草丛草地、温性草原、山地草甸草原的地上现存生物量、凋落物、半分解层、根系和土壤有机碳密度的调查和测定，本研究估算山西天然草地生态系统的碳储量，旨在揭示山西不同类型天然草地固碳能力。结果表明：4种类型草地的植被碳密度、土壤有机碳密度、生态系统有机碳密度的大小顺序相同均为：暖性灌草丛草地 > 山地草甸草原 > 暖性草丛草地 > 温性草原；山西草地植被平均碳密度为1759.07 g·m^-2，占整个草地生态系统的21.81%；土壤平均有机碳密度为6307.22 g·m^-2，占整个草地生态系统的78.19 %；经估算，山西的草地面积为4.55×10⁶ hm²，草地总碳储量约为364.40 Tg。

关键词: 典型草地, 天然草地, 有机碳密度, 碳分布, 碳储量