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应用生态学报 ›› 2009, Vol. 20 ›› Issue (12): 2911-2916.

• 研究报告 • 上一篇    下一篇

黄土高原刺槐人工林幼林生态系统碳吸存

张景群;苏印泉;康永祥**;徐喜明;秦乐   

  1. 西北农林科技大学林学院, 陕西杨凌 712100
  • 出版日期:2009-12-18 发布日期:2009-12-18

Carbon sequestration of young Robinia pseudoacacia plantation in Loess Plateau.

ZHANG Jing-qun;SU Yin-quan;KANG Yong-xiang;XU Xi-ming;QIN Yue   

  1. College of Forestry, Northwest A &F University, Yangling 712100, Shaanxi, China
  • Online:2009-12-18 Published:2009-12-18

摘要: 为了解黄土高原生态林的固碳作用,以刺槐人工林幼林(8年生)和对照荒地为研究对象,比较了两种土地利用方式下,土壤、凋落物和植物各部分的有机碳密度(OCD)和生态系统碳吸存的变化.结果表明:刺槐人工林林地土壤OCD比荒地减少0.26 kg·m-2,其中0~10 cm层土壤OCD显著提高,10~30 cm土层降低,而在30~80 cm层土壤中则变化不明显.与荒地相比,刺槐人工林林地凋落物、植物根系和植物地上部分的OCD分别增加了121.1%、202.0%和656.7%,每年总有机碳吸存率增加3.3%,说明黄土高原营造刺槐人工林具有明显的碳吸存效应.

关键词: 碳吸存, 生态系统, 刺槐人工林, 黄土高原, 烟田, 土壤养分, 空间变异, 管理分区

Abstract: In order to understand the carbon sequestration of ecological forests in Loess Plateau, a comparative study was made on the organic carbon density (OCD) of soil, litter, and plant organs in an 8-year-old Robinia pseudoacacia plantation and nearby barren land. Comparing with the barren land, the young R. pseudoacacia plantation had a decrease (0.26 kg·m-2) of soil OCD, but the OCD in its litter, root system, and aboveground organs increased by 121.1%, 202.0%, and 656.7%, respectively, with a total carbon sequestration increased by 3.3% annually, which illustrated that R. pseudoacacia afforestation on Loess Plateau had an obvious positive effect on carbon sequestration.

Key words: C sequestration, ecosystem, Robinia pseudoacacia plantation, Loess Plateau, tobacco field, soil nutrient, spatial variability, management zone.