桂西南尾巨桉中龄林生态系统碳储量及其分布格局
Carbon Storage and Distribution of Middle-aged Eucalyptus urophylla × E.grandis Plantation Ecosystem in Southwest Guangxi
卢开成 1张明慧 1李春宁 1何斌2
作者信息
- 1. 广西国有派阳山林场,广西宁明532500
- 2. 广西大学林学院,广西南宁530004
- 折叠
摘要
[目的]评价桂西南尾巨桉人工林生态系统固碳能力和生态效益.[方法]采用标准样地法对广西宁明县4年生尾巨桉人工林的碳含量、碳储量及其空间分布格局进行研究.[结果]尾巨桉不同器官碳含量范围为454.80 ～478.50 g/kg,各器官碳含量从大到小依次为干材、树叶、干皮、树枝、树根.灌木层、草本层和凋落物层碳含量分别为463.50、442.70和453.40g/kg.0～80 cm厚土层碳含量为8.89 g/kg,其中表土层(0 ～20 cm厚)的碳含量明显高于其他土层.尾巨按中龄林生态系统碳储量为156.27 t/hm2,其中乔木层为46.02t/hrn2,占29.44％;灌木层为0.86 t/hm2,占0.55％;草本层为0.74 t/hm2,占0.47％;凋落物层为3.30 t/hm2,占2.11％;土壤层为105.35t/hm2,占67.42％.尾巨桉人工乔木层林年净生产力为24.30t/(hm2·a),年净固碳量为11.50 t/(hm2·a),折合CO2量为42.17t/(hm2·a).[结论]桂西南尾巨桉人工林具有较强的碳吸存能力.
Abstract
[Objective] To evaluate carbon sequestration ability and ecological benefits of Eucalyptus urophylla × E.grandis plantation in southwest Guangxi.[Method] Standard plot method was taken to study the content,storage and distribution of carbon in 4-year-old E.urophylla ×E.grandis plantation in Ningming County of Guangxi Province.[Result] The carbon content in different organs of E.urophylla × E.grandis trees ranged from 454.80 g/kg to 478.50 g/kg,which was in order as follow:stem ＞ leaf ＞ bark ＞ branch ＞ root.The carbon content in shrub,herb,litter floor were 463.50,442.70 and 453.40 g/kg,respectively.Carbon content in the soil (0-80 cm) was 8.89 g/kg,of which the carbon content of the topsoil (0-20 cm) was significantly higher than the other layers.The total carbon storage in E.urophylla ×E.grandis plantation ecosystems amounted to 156.27 t/hm2,of which overstorey of E.urophylla × E.grandis trees stored 46.02 t/hm2 and accounted for 29.44％,and shrub layer stored 0.86 t/hm2 and accounted for 0.55％,herb layer plant stored 0.74 t/hm2 and accounted for 0.47％,litter floor plant stored 3.30 t/hm2 and accounted for 2.11％,and soil stored 105.35 t/hm2 and accounted for 67.42％.The annual net productivity of E.urophylla × E.grandis trees was 24.30 t/(hm2 · a),and annual net carbon fixation was up to 11.50 t/(hm2 · a),amounted CO2 to 42.17 t/(hm2 · a).[Conclusion] The E.urophylla × E.grandis plantation in southwest Guangxi has a high capability in carbon sequestration.
关键词
尾巨桉/中龄林/碳含量/碳储量/碳分配Key words
Eucalyptus urophylla × E.grandis/Middle-aged forest/Carbon content/Carbon storage/Carbon distribution引用本文复制引用
基金项目
国家自然科学基金(31160152)
国家自然科学基金(31560206)
广西大学、广西国有派阳山林场重大科技合作项目(2013-3-8)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据