【摘要】 对固碳释氧功能的量化研究,是生态系统物质循环研究的重要内容,也是生态学研究热点之一。本文基于浏阳市油茶林实测数据和统计数据,采用生物量转换因子连续函数法估测了油茶林固碳释氧量。结果表明:2018年浏阳市油茶资源分布于23个乡镇,总面积达4 690.6 hm²,其中新造林84.6 hm²,抚育林4 606 hm²。油茶林总生物量为1.05×10⁵ t,单位面积生物量为22.47 t·hm^-2,油茶林总生物量和单位面积生物量均表现出抚育林显著高于新造林,其中新造林总生物量为111.67 t·hm^-2,单位面积生物量为1.32 t·hm^-2;抚育林总生物量为105 293.16 t·hm^-2,单位面积生物量为22.86 t·hm^-2。2种油茶林均表现为碳汇,具有一定的固碳释氧功能,抚育林碳密度显著高于新造林,但均低于全国平均碳密度和世界平均碳密度,浏阳市油茶林固碳量为46 852.55 t·a^-1,CO₂吸收量为171 809.88 t·a^-1,释氧量为125 431.75 t·a^-1,碳密度为9.99 t·hm^-2,其中,新造林碳汇为49.64 t·a^-1,抚育林碳汇为46 802.91 t·a^-1,碳汇的贡献分别为0.11%和99.89%。抚育林固碳释氧能力明显强于新造林,新造林CO₂吸收量为143.44 t·a^-1,释氧量为132.89 t·a^-1。抚育林CO₂吸收量为171 627.85 t·a^-1,释氧量为125 298.86 t·a^-1。2018年浏阳市油茶林分布广,抚育林的总生物量和单位面积生物量均高于新造林,抚育林和新造林均表现出碳汇,但碳密度较低,抚育林固碳释氧能力明显强于新造林,本文数据以期为人工林碳氧物质循环及固碳释氧功生态效益提供科学依据。更多还原

【Abstract】 The quantitative study of carbon sequestration and oxygen release function is an important content in the study of material circulation in ecosystem and one of the hot spots in ecology. Based on the measured data and statistical data of Camellia oleifolia plantation of Liuyang City, this paper estimates the carbon sequestration and oxygen release of C. oleifolia plantation by biomass conversion factor continuous function method. C. oleifolia plantation were distributed in 23 towns in Liuyang City in 2018 with a total area of 4 690.6 hm², including 84.6 hm² of new plantation and 4 606 hm² of tending plantation. Total biomass of C. oleifolia plantation was 1.05×10⁵ t, biomass per unit area was 22.47 t·hm^-2. Total biomass and biomass per unit area of tending plantation was significantly higher than the new plantation, which total biomass and biomass per unit area of new plantation were 111.67 t·hm^-2 and 1.32 t·hm^-2 respectively; total biomass and biomass per unit area of tending plantation were 105 293.16 t·hm^-2 and 22.86 t·hm^-2 respectively. 2 types of C.oleifolia plantation were characterized by carbon sinks, had certain function of carbon oxygen release, tending plantation carbon density was significantly higher than that of new plantation, but were lower than the national average carbon density and the average carbon density. Carbon sequestration of C.oleifolia plantation was 46 852.55 t·a^-1, carbon dioxide absorption was 171 809.88 t·a^-1, release oxygen was 125 431.75 t·a^-1, carbon density was 9.99 t·hm^-2, among them,carbon sink of new plantation was 49.64 t·a^-1, carbon sinks of tending plantation was 46 802.91 t·a^-1, the contribution of carbon sequestration were 0.11% and 99.89% respectively. Carbon sequestration and oxygen release ability of tending plantation was significantly better than new plantation. Carbon sequestration and oxygen release of new plantation was 143.44 t·a^-1 and 132.89 t·a^-1 respectively. Carbon sequestration and oxygen release of tending plantation was 171 627.85 t·a^-1 and 125 298.86 t·a^-1 respectively.C.oleifera plantations in Liuyang City is widely distributed in 2018. The total biomass and biomass per unit area of tending plantation were higher than that of new plantation, and both tending plantation and new plantation showed carbon sink, but the carbon density was lower. Carbon fixation and oxygen release capacity of tending plantation was significantly stronger than that of new plantation.更多还原