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Scientia Silvae Sinicae ›› 2016, Vol. 52 ›› Issue (8): 122-130.doi: 10.11707/j.1001-7488.20160815

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Calorific Values and Standing Crop of Energy of Important Sympodial Bamboo Species in China

Teng Jiangnan1, Huang Zhangting1,2, Xiang Tingting1, Jiang Peikun1,2, Meng Cifu1,2   

  1. 1. School of Environmental and Resource Sciences, Zhejiang Agriculture and Forestry University Lin'an 311300;
    2. Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration Zhejiang Agriculture and Forestry University Lin'an 311300
  • Received:2015-01-06 Revised:2016-07-01 Online:2016-08-25 Published:2016-09-19

Abstract: [Objective] The sympodial bamboos is an important potential energy source,, and studies of gross caloric values (GCV) of them is of great significance. This study aims to determine the GCV of different organs of bamboo and estimate the standing crop of energy (SCE) of 8 sympodial bamboo species in China. By comparing the differences of SCE of 8 sympodial bamboo species, advantageous specie can be identified for developing biomass energy from sympodial bamboos. This study was intended to provide basic data for the development and utilization of biomass energy from sympodial bamboos.[Method] Leaves, branches and culms of the 8 sympodial bamboo species (Bambusa textilis, Bambusa chungii, Dendrocalamus latiflorus, Dendrocalamopsis oldhami, Dendrocalamus membranceu, Dendrocalamus giganteus, Bambusa burmanica and Neosinocalamus affinis) were selected as experimental materials. Biomass of the samples were investigated, the GCV of the samples was measured with the calorimeter, and the SCE was estimated.[Result] 1) The biomass of 8 sympodial bamboo species were ranged from 16.68 to 77.72 t·hm-2, the biomass of Dendrocalamus giganteus was the highest, the biomass of Dendrocalamus latiflorus was the lowest. Besides, the biomass of different bamboo organs was in the following order:culms > branches > leaves. There were variations in the distribution of biomass among different organs. 2) The GCVs of different organs among the 8 sympodial bamboo species ranged from 16.407 to 19.948 kJ·g-1. The GCVs were decreased with the increase of age of the bamboos. The GCV of each organ was higher in Bambusa burmanica than in the other species. The GCV of leaf (16.652 kJ·g-1) and branch (17.522 kJ·g-1) was lower in Dendrocalamopsis oldhami than in the others. The GCV of culm was significantly lower in Neosinocalamus affinis (17.710 kJ·g-1) than in the others. Except for Neosinocalamus affinis, the GCVs of different organs among other sympodial bamboo species were in the following order:culms >branches > leaves. The GCVs of different organs of Neosinocalamus affinis were in the following order:branches > culms > leaves. 3) The SCEs of 8 sympodial bamboo species were in the following order:Dendrocalamus giganteus (142.17 MJ·m-2) > Bambusa chungii (115.41 MJ·m-2) > Neosinocalamus affinis (112.97 MJ·m-2) > Bambusa burmanica (95.26 MJ·m-2) > Bambusa textilis (87.50 MJ·m-2) > Dendrocalamopsis oldhami(85.31 MJ·m-2) > Dendrocalamus membramaceus (85.14 MJ·m-2) > Dendrocalamus latiflorus (31.34 MJ·m-2).[Conclusion] 1) Sympodial bamboos are potential energy sources, influenced by biological characteristics of the bamboos, characteristics of the bamboo forest and climate conditions, there were significant differences in GCV, biomass and its allocation among the 8 sympodial bamboo species. 2) Because of the different habitats of 8 sympodial bamboo species, the comparison between different bamboo species based on SCE is more reliable. There were significant differences in the SCE and the distribution of SCE among 8 sympodial bamboo species. Different SCEs of different species mainly depended on the difference of biomass. 3) By comparing the SCEs of the 8 sympodial bamboo species, Dendrocalamus giganteus was more advantageous over the other species, in favoring utilization and development of biomass energy from sympodial bamboos and follow-up studies in future.

Key words: sympodial bamboo, organs, gross caloric values, biomass, standing crop of energy

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