草地农业生态系统的碳平衡分析方法

发布时间：2019-02-13 12:02

【摘要】：根据草地农业生态系统的结构,它的碳平衡为4个生产层的碳平衡之和,也是3个界面的碳平衡之和,而某一生产层或者某一界面的碳平衡则是其固定、输入、排放和输出的碳之和。草地农业生态系统4个生产层的碳平衡分析方法定量重要生产环节的碳汇与碳源过程,便于草业生产改进碳汇管理;草地农业生态系统3个界面的碳平衡分析方法显示碳源和碳汇的发生机理,及其空间和数量关系,便于调控草业生产组分以增汇减排;但是,这两个方法不易区分碳的来源和去向,难以明确其利用效率。草地农业生态系统碳平衡分析的输入/输出法定量地指示碳的来源和去向,以及碳效率,计算简单,但是较为概括,不利于牧场尺度的草业碳汇管理。以中国祁连山甘肃马鹿牧场和澳大利亚塔斯玛尼亚奶牛牧场为例,用3种方法分析了两个牧场的碳平衡,结果表明,放牧管理的草业系统的主要碳源是休闲旅游、产品加工流通环节产生的温室气体,主要碳汇是草地和土壤中贮存的碳,好的草地管理可以增汇减排。
[Abstract]:According to the structure of the grassland agro-ecosystem, its carbon balance is the sum of the carbon balance of the four production layers, the sum of the carbon balance of the three interfaces, and the carbon balance of a production layer or an interface is fixed, input. The sum of carbon emitted and exported. Carbon balance Analysis of four productive layers in grassland Agroecosystem quantitative analysis of carbon sequestration and carbon source processes in important production links is convenient for improving carbon sequestration management in grass production. The carbon balance analysis method at three interfaces of grassland agro-ecosystem shows the mechanism of carbon source and carbon sink and its spatial and quantitative relationship, which is convenient to regulate the production components of grassland industry to increase emission reduction. However, the two methods are difficult to distinguish between the source and destination of carbon, and it is difficult to identify its utilization efficiency. The input / output method for the analysis of carbon balance in grassland agro-ecosystem indicates the source and direction of carbon, and the carbon efficiency. The calculation is simple, but it is relatively general, which is not conducive to the management of grassland carbon sinks on rangeland scale. Taking Gansu Wapu Ranch and Tasmania Dairy cattle Farm in Qilian Mountains, China as examples, the carbon balance of two pastures was analyzed by three methods. The results showed that the main carbon source of herbage industry system managed by grazing was leisure tourism. The main carbon sequestration is the carbon stored in the grassland and soil, and good grassland management can increase the emission reduction.
【作者单位】：兰州大学草地农业科技学院草地农业生态系统国家重点实验室;
【基金】：国家重点基础研究发展计划资助项目(2014CB138706) 国家自然科学基金资助项目(31172249) 长江学者和创新团队发展计划资助项目(IRT13019) 国家科技支撑计划课题资助项目(2011BAD17B0203)
【分类号】：S812

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