基于Biome-BGC模型的西双版纳橡胶林碳收支模拟

发布时间：2018-03-23 20:33

本文选题：橡胶林　切入点：净生态系统交换量　出处：《生态学报》2017年17期

【摘要】：以西双版纳橡胶适宜种植区(海拔550—600m)的橡胶林(Hevea brasiliensis)为研究对象,应用参数同化后的Biome-BGC模型模拟了1959—2012年橡胶林的碳循环。结果表明,(1)与涡度相关监测结果相比,橡胶林年总初级生产力(Gross Primary Productivity,GPP)、年总呼吸(Total Respiration,Rt)的模拟精度分别为98.37%和90%。由于对年GPP的过低估计和对年Rt的过高估计,年净生态系统交换量(Net Ecosystem Exchange,NEE)的模拟值比实测值低157.35 g C m~(-2)a~(-1)。但若考虑干胶碳(139g C m~(-2)a~(-1)),模拟值与实测值十分接近;(2)橡胶林在模拟进行的前8年里因异养呼吸较高,以碳排放为主,NEE平均约357 g C m~(-2)a~(-1);之后转为以碳固定为主,NEE平均约~(-1)46 g C m~(-2)a~(-1);(3)橡胶林在40年的更新周期中可固定碳1835 g C m~(-2),是一个弱的碳汇。但与热带雨林相同周期固碳6720 g C m~(-2)相比,仍为碳源。以上结果为深入了解橡胶种植对区域碳循环的影响提供了科学依据,建议当地政府一方面要有计划的对老胶林进行更新,以维持当前橡胶林生态系统中的碳平衡;另一方面要注重对热带雨林的保护,从而实现区域经济和生态环境保护的协调发展。
[Abstract]:Taking Hevea brasiliensis, a rubber forest in Xishuangbanna suitable planting area (550-600 m above sea level) as the research object, the carbon cycle of rubber forest from 1959 to 2012 was simulated by using the Biome-BGC model after parameter assimilation. The results showed that the carbon cycle of the rubber forest was compared with the vorticity correlation monitoring results. The simulation accuracy of gross Primary Productivity and Total Respiration Rt of rubber stands is 98.37% and 90% respectively. Because of the overestimation of annual GPP and the overestimation of annual RT, the accuracy of simulation is 98.37% and 90% respectively. Net Ecosystem exchange volume (net Ecosystem exchange volume) is 157.35 g / m ~ (-1) lower than the measured value. However, if we consider dry rubber carbon (139g C ~ (m-1)), the simulated value is very close to the measured value (~ (2))) the ectotrophic respiration in the rubber forest is higher than that in the previous eight years of the simulation, but if we consider the dry rubber carbon (139g / kg), the simulated value is very close to the measured value (~ (2))) in the first eight years of the simulation, the ectotrophic respiration of the rubber forest is higher than that of the measured value. The average carbon emission is about 357g / m ~ (-1) C ~ (-1) C ~ (2) C ~ (2) C ~ (1) C ~ (2) C ~ (2) C ~ (2) C ~ (2) C ~ (2) C ~ (2) C ~ (2) C ~ (2 +) C ~ (2) C ~ (2) C ~ (2) C ~ (2 +) C ~ (2 +) C ~ (2) C ~ (2) C ~ (2) C ~ (2) C ~ (2)? Carbon sequestration (6720 g C m ~ (2)), The above results provide a scientific basis for further understanding the impact of rubber cultivation on regional carbon cycle. On the one hand, the local government should renew the old rubber forest in a planned way to maintain the carbon balance in the current rubber forest ecosystem; On the other hand, we should pay attention to the protection of tropical rain forest so as to realize the coordinated development of regional economy and ecological environment protection.
【作者单位】：云南经济管理学院;西双版纳热带植物园综合保护中心;亚热带农业资源保护与利用国家重点实验室广西大学林学院;云南国土资源职业学院;深圳市深港产学研环保工程技术股份有限公司;
【基金】：中国科学院战略性先导科技专项(XDA05050206)
【分类号】：S794.1

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