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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (7): 80-84.

所属专题： 园艺； 农业生态

• 林学 园艺 园林 • 上一篇    下一篇

柳州市短周期桉树人工林生态系统碳储量研究

陶玉华 马麟英 曹书阁 隆卫革 郭耆 向达永   

  • 收稿日期:2011-10-31 修回日期:2011-12-13 出版日期:2012-03-05 发布日期:2012-03-05
  • 基金资助:

    广西教育厅科学技术研究项目

Study on Carbon Storage of Eucalyptus Plantations in Short Period in Liuzhou, Guangxi Province

  • Received:2011-10-31 Revised:2011-12-13 Online:2012-03-05 Published:2012-03-05

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摘要：

通过野外调查和实验室材料分析，对广西柳州市短周期桉树(Eucalyptus sp.)人工林生态系统碳含量、碳储量进行了研究。结果表明：2年、3年、4年桉树人工林的林下植被含碳率分别为41.9%、41.1%、40.85%，彼此间差异未达到显著水平（P<0.05）。桉树人工林枯落物含碳率表现为：2年>4年>3年。0~60 cm土层含碳率变化幅度为0.32~0.65%。4年桉树人工林碳储量分别是2年、3年的2.16、1.18倍。桉树乔木层碳储量表现出随林龄的增加而加大的趋势。3年、4年桉树林乔木碳储量占总碳储量的比例分别为38.61%、57.42%，在生态系统总碳储量中贡献率较高。2年、3年、4年桉树人工林林下植被碳储量分别占其总碳储量的0.86%、2.69%、1.49%，枯落物碳储量分别占其总碳储量的8.55%、3.98%、2.62%。林下植被和枯落物碳汇贡献率较低。2年、3年、4年桉树人工林壤碳储量分别为37.54、46.92、39.2 t/hm2，彼此间无显著差异，桉树人工林0~20 cm碳储量占了整个土壤碳储量的41.2%，20~40 cm碳储量占整个土壤碳储量的31.88%，可见0~40 cm土壤碳储量成为土壤的主体。乔木和土壤碳储量成为短周期桉树人工林重要的碳储存库，本研究为本地区提供了短周期桉树人工林生态系统碳储量数据。

关键词: 温度, 温度

Abstract:

By using the methods of field investigation, soil sampling and laboratory analysis, the carbon content, storage in eucalyptus (Eucalyptus sp.) plantation ecosystems near Liuzhou, Guangxi Province was studied. The results showed that the carbon content (percent of dry weight) of the understory layer in all plantations at 2a, 3a, 4a were 41.9%, 41.1%, 40.85% respectively, there was no significant difference (P<0.05). The litter content ranged, from highest to lowest as follows: 2a >4a >3a. The carbon content of soil from 0-60 cm depth ranged from 0.32%-0.65%. The total carbon storage of eucalyptus plantations at 2a, 3a, 4a were 47.2, 85.76, 101.9 t/hm2, respectively. The carbon stored in the tree layer increased with ages, there was significant difference between them. Carbon storage in tree layer at 3a, 4a accounted for 38.61% (33.12 t/hm2), 57.42% (58.51 t/hm2) of the entire stored carbon within each of the respective ecosystems, they contributed much to entire ecosystems. The carbon stored in the understory layer of eucalyptus plantations at 2a, 3a, 4a accounted for 0.86%, 2.69%, 1.49% of the total carbon stored in the ecosystem respectively，the carbon stored in the litter of eucalyptus plantations at 2a, 3a, 4a accounted for 8.55%, 3.98%, 2.62% of the total carbon stored in the ecosystem respectively. The Eucalyptus plantations soil carbon storage were 37.54, 46.92, 39.2 t/hm2 respectively, there was significant difference between them, the soil carbon with 0-20 cm depth accounted for 41.2% of total soil carbon stock, and the soil carbon with 20-40 cm depth accounted for 31.88%. The carbon stored in the tree layer and soil combined accounted for the majority of the carbon stored within these plantation systems, where as the carbon stored in the understory and litter contributed the least to the total carbon stock. The study offered the basic data for short -rotation Eucalyptus plantation in Guangxi area.