我国不同气候区油用牡丹生态系统服务价值评估

The Assessment of the Oil Tree Peony Ecosystem Services Value in Different Climate Regions of China

油用牡丹是重要的木本油料植物,但以往主要关注其经济价值,缺乏对其生态系统生态服务功能的认识。基于野外观察数据,采用单位服务功能价格法,从水源涵养、土壤保持、防风固土、固碳释氧、净化环境和生物多样性保护等方面,对不同气候区和地形条件下的油用牡丹生态系统服务价值进行评估,并与自然草地生态系统进行比较。结果表明,油用牡丹生态系统平均固碳释氧价值显著低于自然草地,其他平均服务价值在油用牡丹和草地之间无显著差异;佳县油用牡丹生态系统土壤保持价值和防风固土价值低于自然草地,洛宁县油用牡丹生态系统土壤保持价值和防风固土价值高于自然草地,建昌县油用牡丹生态系统土壤保持价值高于自然草地。结果有助于在综合考虑气候特征、地形条件等因素的基础上,权衡油用牡丹生态系统经济价值和生态服务价值,合理安排油用牡丹种植和管理措施,为促进油用牡丹产业的可持续发展提供理论依据。

Oil tree peony is one of the important resource plants which can produce oil.However,the economic value of oil tree peony ecosystem was well considered,its ecological values were less understood.Based on the field observation data,the ecosystem services value of the oil tree peony and grassland in different climate regions and terrains were quantitatively assessed by six functional evaluation indexes of water conservation,wind erosion prevention,soil retention,carbon sequestration and oxygen release,environment purification,and biodiversity conservation.The results showed that the average value of the carbon fixation and oxygen release was significantly higher in oil tree peony ecosystem than that in natural grassland ecosystem,and no significant difference for other average service values between oil tree peony ecosystem and natural grassland ecosystem.However,the service values of wind erosion prevention and soil conservation of the oil peony ecosystem in Jiaxian County were lower than that of natural grassland,while the values were higher in Luoning County than that in natural grassland.And the service values of soil conservation of the oil peony ecosystem in Jianchang County was higher than that of natural grassland.The results in this research are useful for tradeoff between economic and ecosystem service values of the oil tree peony ecosystem based on the climate and terrain conditions,and for arranging the planting and management for the oil peony.The results also could provide a theoretical basis for the sustainable development of the oil tree peony industry.