热带果类农产品碳足迹核算研究——以海南芒果为例

Estimate of Carbon Footprint Accounting of Tropical Fruit Agricultural Products——Taking Hainan Mango as an Example

为识别热带果类农产品生命周期过程中的碳足迹热点,以海南芒果为研究对象,采用生命周期评价法核算了芒果生产的碳足迹。结果表明,芒果生产碳足迹9.22 t·CO_(2)/hm^(2),碳排放量高于碳固定量,即每公顷芒果园在生产过程中CO_(2)净排放量为9.22 t;芒果总碳排放为19.72 t·CO_(2)/hm^(2),其中芒果园土壤呼吸、种植过程中的氮肥施用是芒果碳足迹的主要排放源,分别占总排放量的73.39%、15.41%;芒果园固碳量为10.50 t·CO_(2)/hm^(2),芒果树树体本身的固碳是主要的固碳途径,占总固碳量的84.2%。研究结果可为有效制定碳减排方案提供理论和数据支撑,有利于热带高效低碳农业的发展和减排目标的实现。

To identify the carbon footprint hot spots in the life cycle of tropical fruit agricultural products,the carbon footprint of mang was calculated by life cycle assessment.The results showed that the carbon footprint of mango was 9.22 t·CO_2/hm^(2),and carbon emissions higher than fixed carbon,which meant the net CO_2 emission per hectare of mango was 9.22 t.Detailed analysis showed that the total carbon emission of mango was 19.72 t·CO_2/hm^(2),and soil respiration in a mango orchard and nitrogen application during planting was the prime carbon emission sources of mango carbon footprint,accounting for 73.39%and 15.41%of the total emissions respectively.The carbon sequestration of the mango orchard was 10.50 t·CO_2/hm^(2),and the carbon sequestration of the mango tree was the prime carbon sequestration way accounting for 84.2%of total carbon sequestration.The research results could provide theoretical and data support for the effective formulation of carbon emission reduction schemes and the implementation of a carbon labeling system;and would be conducive to the low-carbon agriculture development and the emission reduction targets realization.