豫东平原农区杨树-农作物复合生态系统的碳贮量  

Carbon storage of poplar-crop ecosystem in Eastern Henan Plain

作　　者：李庆云[1] 樊巍[2] 余新晓[1] 万猛 

机构地区：[1]北京林业大学水土保持学院水土保持与荒漠化防治教育部重点实验室,北京100083 [2]河南省林业科学研究院,郑州450008 [3]河南省林业调查规划院,郑州450045

出　　处：《应用生态学报》2010年第3期613-618,共6页Chinese Journal of Applied Ecology

基　　金：国家"十一五"科技支撑计划项目(2006BAD03A0506);国家林业局重点科研项目(2006-69);林业公益性行业科研专项基金项目(200704014)资助

摘　　要：将豫东平原农区5a、9a、11a和13a4个林龄阶段的杨树-农作物复合系统分为林木、农作物、凋落物和土壤4个子系统,分别研究其碳贮量.结果表明:5a、9a、11a和13a杨树-农作物复合生态系统林木及凋落物的碳贮量分别为7.86、42.07、44.31和60.71t·hm-2;间作作物平均每年可吸收CO26.8t·hm-2;农田土壤碳贮量分别为45.55、51.06、55.94和60.49t·hm-2;杨树-农作物间作系统的总碳贮量分别达60.81、100.09、106.76和127.34t·hm-2,远高于单作农田(49.36t·hm-2).各年龄阶段杨树和土壤碳贮量占总碳贮量的比例最大,在87.1%～93.1%,而农作物和凋落物碳贮量比例较小,占总贮量的6.9%～12.9%.说明农林复合生态系统具有很强的吸收和固定碳的能力.Aimed to understand the carbon storage of poplar-crop ecosystem in Eastern Henan Plain, the poplar-crop ecosystems with different ages （5, 9, 11, and 13 years old） of poplar were selected, and each of them was further divided into four subsystems, i.e., forest, crop, litterfall, and soil. In the poplar-crop ecosystems with 5, 9, 11, and 13 years old poplar, the carbon storage of the subsystems forest and litterfall was summed as 7.86, 42.07, 44.31, and 60.71 t·hm^-2, respectively. Subsystem crop averagely sequestrated 6.8 t·hm^-2 of CO2 per year, and the carbon storage of subsystem soil achieved 45.55, 51.06, 55.94, and 60.49 t·hm^-2, respectively. The total carbon storage of these four poplar-crop ecosystems reached 60.81, 100.09, 106.76, and 127.34 t·hm^-2, respectively, much higher than that in mono-cultured farmland （49.36 t·hm^-2）. For the test poplar-crop ecosystems, the carbon storage of subsystems forest and soil occupied a large proportion, accounting for 87.1%-93.1% of the total carbon storage, while that of subsystems crop and litterfall occupied a relatively small proportion, being 6.9%-12.9% of the total, illustrating that agro-forestry ecosystem had a high potential in carbon absorption and sequestration.

关 键 词：农林复合生态系统 杨树-农作物 碳贮量 豫东平原 

分 类 号：S718.551.2[农业科学—林学]