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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.
The composite system of poplar-crop was divided into 4 subsystems, ie, forest, crop, litter and soil, and their carbon stocks were studied respectively in the stages of 5a, 9a, 11a and 13a in the farmlands of eastern Henan.The results showed that: 9a, 11a and 13a The carbon stocks of poplar-crop compound ecosystem tree and litter were 7.86,42.07,44.31 and 60.71t · hm-2, respectively; the average annual uptake of intercrop crops was CO26.8t · hm-2; Soil carbon storage was 45.55, 51.06, 55.94 and 60.49 t · hm-2, respectively. The total carbon storage of poplar-crop intercropping system was 60.81, 100.09, 106.76 and 127.34 t · hm-2, Farmland (49.36t · hm-2). The carbon storage of poplar and soil accounted for the largest percentage of total carbon storage in all ages, ranging from 87.1% to 93.1%, while the proportion of crop and litter carbon storage was the smallest From 6.9% to 12.9%, indicating that Agroforestry ecosystem has a strong ability of absorbing and fixing carbon.