土地利用方式对荒漠草地生物量分配及碳密度的影响

发布时间：2019-03-29 18:55

【摘要】：草地生态系统群落生物量的分配模式对于研究生态系统碳储量和碳循环有着重要的意义。为了解内蒙古荒漠草地群落生物量垂直分配格局,从不同土地利用方式着手探讨群落生物量不同成层性分配规律并估算荒漠草地生物量碳密度。结果表明:(1)人工灌溉草地灌木层生物量明显高于放牧和原生草地,草本层生物量表现出灌溉草地原生草地放牧草地,而凋落物层表现出灌溉草地放牧草地原生草地,地上生物量集中在草本层(60%以上),地下0~10cm生物量大于其他层生物量(P0.05)。(2)灌木层生物量、草本层生物量、凋落物层间存在极显著的相关关系(P0.0001);地下各层生物量之间存在极显著相关关系(P0.0001);且灌溉草地与原生草地群落地上层生物量与地下层生物量之间存在显著相关关系(P0.05),故可以建立生物量成层性分配模型。(3)生物量碳密度原生草地放牧草地灌溉草地。
[Abstract]:The biomass allocation model of grassland ecosystem community is of great significance to the study of carbon storage and carbon cycle in the ecosystem. In order to understand the vertical distribution pattern of biomass of desert grassland community in Inner Mongolia, the different stratification distribution rules of community biomass were discussed from different land use patterns and the biomass carbon density of desert grassland was estimated. The results were as follows: (1) the biomass of shrub layer in irrigated grassland was significantly higher than that of grazing and primary grassland, and the biomass of herbaceous layer showed that the primary grassland of irrigated grassland and the litter layer showed primary grassland of irrigated grassland, and the biomass of herbaceous layer showed that of irrigated grassland. The aboveground biomass was concentrated in the herbaceous layer (more than 60%), and the underground 0~10cm biomass was higher than the other layer biomass (P0.05). (2). There was a significant correlation between the shrub layer biomass, herbaceous layer biomass and litter layer (P0.0001). There was a very significant correlation between the underground biomass (P0.0001); There was a significant correlation between biomass and underground biomass between irrigated grassland and primary grassland (P0.05). Therefore, the model of biomass stratification distribution can be established. (3) the primary grazing grassland of biomass carbon density is irrigated grassland.
【作者单位】：内蒙古农业大学生态环境学院;内蒙古农业大学理学院;中国农业科学院草原研究所;
【基金】：国家重点基础研究发展计划项目(2014CB138805) 国家自然科学基金项目(31460126) 国家科技支撑计划项目(2012BAD13B00) 内蒙古自然科学基金项目(2015MS0349)
【分类号】：S812

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