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林业资源管理 ›› 2012›› Issue (3): 100-106.

• 科学技术 • 上一篇    下一篇

东北落叶松不同器官的热值和灰分含量分析

王云霖, 党永峰, 曾伟生   

  1. 国家林业局调查规划设计院,北京 100714
  • 收稿日期:2012-02-04 修回日期:2012-03-29 出版日期:2012-06-28 发布日期:2020-11-27
  • 通讯作者: 曾伟生,教授级高工,主要从事森林资源监测工作。Email:zengweisheng@sohu.com
  • 作者简介:王云霖(1982-),女,江苏南通人,助工,主要从事森林资源监测和国家生态网视频制作。

Calorific Values and Ash Contents of Different Organs of Larch in Northeastern China

WANG Yunlin, DANG Yongfeng, ZENG Weisheng   

  1. Academy of Forest Inventory and Planning,State Forestry Administration,Beijing 100714,China
  • Received:2012-02-04 Revised:2012-03-29 Online:2012-06-28 Published:2020-11-27

摘要: 植物热值是森林生态系统中物质循环和能量转化评价的重要指标。利用假设检验和回归分析方法,对东北落叶松不同器官的热值和灰分含量进行了研究。结果表明:林木不同器官的热值和灰分含量在统计上大都存在显著差异,去灰分热值从大到小排序为叶(21.57 kJ/g)﹥枝(20.98 kJ/g)﹥皮(20.73 kJ/g)﹥根(19.88 kJ/g)﹥干(19.51 kJ/g),灰分含量排序为叶(5.79%)﹥皮(2.48%)﹥枝(1.88%)﹥根(0.95%)﹥干(0.47%);树干热值和灰分含量随树干从下往上呈增加趋势,且上、中、下部均存在显著差异;树根热值和灰分含量从根茎、粗根到细根也呈增加趋势,且两两之间差异显著;地上部分的平均干质量热值、去灰分热值和灰分含量均大于地下部分(树根),且差异显著;不同器官的热值和灰分含量与林木直径、树高和起源等因子显著相关,但其影响程度不尽相同。

关键词: 干质量热值, 去灰分热值, 灰分含量, 假设检验, 回归分析, 落叶松

Abstract: Calorific values of plants are important indices for evaluating and reflecting material cycle and energy conversion in forest ecosystems. Based on the data of larch (Larix spp) in northeast China,the calorific values (CV's) and ash contents (AC's) of different plant organs were analyzed systematically using hypothesis test and regression analysis in this paper. The results show: (i) the CV's and AC's of different plant organs are almost significantly different,and the order by AFCV (ash-free calorific value) from the largest to the smallest is foliage (21.57 kJ/g),branches (20.98 kJ/g),stem bark (20.73 kJ/g),root (19.88 kJ/g),and stem wood (19.51 kJ/g); and the order by AC is foliage (5.79%),stem bark (2.48%),branches (1.88%),root (0.95%),and stem wood (0.47%); (ii) the CV's and AC's of stem woods are increasing from lower to top sections of trunk,and those of top,middle and lower sections are significantly different; (iii) the CV's and AC's of roots are increasing from stump to large and small roots,and those between each pair are significantly different; (iv) the mean GCV (gross calorific value),AFCV and AC of aboveground part are larger than those of belowground part (roots),and the differences are also statistically significant; (v) the CV's and AC's of different organs are significantly related to diameter,height and origin of the tree,but the influence degrees of the factors on CV's and AC's are not the same.

Key words: gross calorific value, ash-free calorific value, ash content, hypothesis test, regression analysis, Larix

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