宁夏近20a草地碳汇的初步估算

根据宁夏农牧厅草原站近20 a的草地观测资料和对相关文献资料数据的提取和推算,参考《2006年IPCC指南》中第四卷第6章＂草地＂碳汇编制清单指南,计算了宁夏不同节点年份草地总碳储量以及变化情况,得到：宁夏天然草地1990—2000年间主要因面积减少碳汇量减少了约58.79万t,2000—2010年间因实施了多种天然草原恢复和保护措施碳汇量增加了约124万t;宁夏人工草地1990—2000年间因面积增加碳汇量增加了约77.2万t,2000—2010年间因人工种草业及技术的大力发展碳汇量增加了约288.43万t.总的来说,宁夏近20 a草地碳汇共增加了365.63万t,平均以每年18.28万t的速度增加,其主要原因归结于封山禁牧等草地保护工程的实施和人工种草业的大力发展,草地碳汇量的迅速增加,为支持宁夏经济发展中的节能减排作出了相应的贡献.

The preliminary estimation of the grassland carbon sinks in Ningxia from 1990 to 2010

According to the grass station observational data and the literature extraction from Ningxia Agriculture and Animal Husbandry Department in recent 20 years,and referring to the ＂2006 IPCC Guidelines＂in Volume IV Chapter 6,＂Grass＂ and carbon sinks compiled Guidelines,the total grassland carbon storage in different nodes and changes of Ningxia were calculated.Results shown that natural grassland carbon sinks reduced about 587,900 tons due to the area reduction mainly from 1990 to 2000 years in Ningxia,while the carbon sinks increased about 1,240,000 tons due to implementing the variety of natural grassland restoration and protection measures from 2000 to 2010 years;Artificial grassland carbon sequestration increased about 772,000 tons due to the increasing area from 1990 to 2000,and the carbon sinks increased about 2,884,300 tons due to artificial grassland and technology developed vigorously in Ningxia.Overall,grassland carbon sinks increased 3,656,300 tons in recent 20 years in Ningxia,which increased in an average speed about 182,800 tons annual year because of controlled grazing,grassland protection project and artificial grassland industry development,the rapid increase of grassland carbon sinks could support the energy conservation and contribute to economic development of Ningxia.