喀斯特峰丛洼地不同适生植物配置模式固碳能力及效益评价

Study on carbon sequestration capacity and benefit evaluation of different suitable plants configuration modes in depression between karst hills

为将植被的固碳增汇效应纳入到贵州喀斯特山区植被恢复与重建工程中,研究了贵州典型喀斯特峰丛洼地环境下5种植物配置模式的碳储量、空间分布特征及其固碳效益.结果表明：不同配置模式植被各层碳储增量表现为草本层＞藤本层＞灌木层＞乔木层,其中草本层碳储量增量占植被层碳储量比重变化范围为36.56％～78.07％,在植被层中居主导地位;不同配置模式土壤层碳储量与对照相比没有明显变化,女贞林、国槐林、任豆林和白蜡林较对照有略微增加,而构树林则稍有下降,且土壤层的碳储量在各配置模式碳储量中占据主导地位;研究区实施植被恢复后各配置模式碳储量均有所升高,女贞林、国槐林、任豆林、白蜡林和构树林的碳储量分别增加了0.579、1.813、3.254、1.227、1.349 t/hm2,固碳效益表现为任豆林（848.97元/hm2）＞国槐林（473.01元/hm2）＞构树林（351.95元/hm2）＞白蜡林（320.12元/hm2）＞女贞林（151.06元/hm2）.

In order to integrate increasing carbon sequestration of plants into vegetation restoration and reconstruction project in Guizhou karst areas, the carbon storage, spatial distribution characteristics and carbon sequestration benefits of 5 kinds of configuration modes were studied in depression between karst hills. The results showed that, carbon storage increment of each layer plants in different configuration modes performanced as herbaceous layer 〉 fujimoto layer 〉 shrub layer 〉 tree layer, the proportion of carbon storage of herbaceous layer in total carbon storage varied from 36.56% to 78.07%, which was dominant in vegetation layer. Carbon storage of soil had no significant change compared with the control group, soil carbon storage of Ligustrum lucidum, Sophora japonica, Zenia insignis and Fraxinus chinensis increased slightly, but decreaced for Broussouetia papyrifera, and carbon storage of soil was dominant in the total carbon storage of different configuration modes, the carbon storage of each configuration mode were all increaced after the implementation of vegetation restoration in research areas, the carbon storage of L. lucidum, S. iauonica. Z. insignis.F. chinensis and B. papyrifera increaced by 0.579 t/hm2, 1.813 t/hm2, 3.254 t/hm2, 1.227 t/hm2, 1.349 t/hm2 respectively, carbon sequestration benefits performanced as Z. insignis （848.97 Yuan/hm2） 〉 S. japonica （ 473.01 Yuan/hm2 ） 〉 B. papyrifera （ 351.95￥/hm2 ） 〉 F. ehinensis （ 320.12 Yuan/hm2 ） 〉 L. lucidum （ 151.06 Yuan/hm2 ） .