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Citation:

Study on Dynamic of Casuarina equisetifolia Plantation Litter and Its Caloric Value on Coastal Sands

  • Received Date: 2005-06-21
    Accepted Date: 2006-05-30
  • By burning samples in a GR-3500 Oxygen Bomb Calorimeter,the caloric value of Casurina equisetifolia litter collected by traps from Nov.2002 to Oct.2003 at Chihu forestry centre in Huian county in the middle of Fujian coast was analyzed,and the ash content and ash free caloric value of every components were tested.Result showed that Casuarina equisetifolia plantation litter was 14.18 t·hm-2·a-1,foliage twig occupied 72.21% of total,branch,cone,flower were 23.41%,2.68%,1.69%,respectively.The monthly dynamic variance was that the fastigium was from April to September,occupied 68.48% of total litter,and that in the other months occupied 31.52%.The average ash content order of components were flower(5.32%)>foliage twig(4.90%)>twig(4.69%)>cone(3.20%).The average gross caloric value order of components were foliage twig(21.11 kJ·g-1)>flower(20.96 kJ·g-1)>cone(19.91 kJ·g-1)>twig(19.89 kJ·g-1).The average ash free caloric value order were foliage twig(22.19 kJ·g-1)>flower(22.18 kJ·g-1)>twig(20.87 kJ·g-1)>cone(20.63 kJ·g-1).The C.equisetifolia plantation had high returning energy in a year,the amount of total plant was 294.55 GJ·hm-2·a-1.The distribution among the components are as follows: foliage twig was 215.79 GJ·hm-2·a-1 while twig,cone,flower were 66.07 GJ·hm-2·a-1,7.66 GJ·hm-2·a-1,5.02 GJ·hm-2·a-1,respectively,with same dynamic tendency as the litter biomass variance.
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Study on Dynamic of Casuarina equisetifolia Plantation Litter and Its Caloric Value on Coastal Sands

  • 1. Research Institute of Tropical Forestry,CAF,Guangzhou 510520,Guangdong,China
  • 2. Fujian Academy of Forestry,Fuzhou 350012,Fujian,China
  • 3. School of Life Sciences Xiamen University,Xiamen 361005,Fujian,China

Abstract: By burning samples in a GR-3500 Oxygen Bomb Calorimeter,the caloric value of Casurina equisetifolia litter collected by traps from Nov.2002 to Oct.2003 at Chihu forestry centre in Huian county in the middle of Fujian coast was analyzed,and the ash content and ash free caloric value of every components were tested.Result showed that Casuarina equisetifolia plantation litter was 14.18 t·hm-2·a-1,foliage twig occupied 72.21% of total,branch,cone,flower were 23.41%,2.68%,1.69%,respectively.The monthly dynamic variance was that the fastigium was from April to September,occupied 68.48% of total litter,and that in the other months occupied 31.52%.The average ash content order of components were flower(5.32%)>foliage twig(4.90%)>twig(4.69%)>cone(3.20%).The average gross caloric value order of components were foliage twig(21.11 kJ·g-1)>flower(20.96 kJ·g-1)>cone(19.91 kJ·g-1)>twig(19.89 kJ·g-1).The average ash free caloric value order were foliage twig(22.19 kJ·g-1)>flower(22.18 kJ·g-1)>twig(20.87 kJ·g-1)>cone(20.63 kJ·g-1).The C.equisetifolia plantation had high returning energy in a year,the amount of total plant was 294.55 GJ·hm-2·a-1.The distribution among the components are as follows: foliage twig was 215.79 GJ·hm-2·a-1 while twig,cone,flower were 66.07 GJ·hm-2·a-1,7.66 GJ·hm-2·a-1,5.02 GJ·hm-2·a-1,respectively,with same dynamic tendency as the litter biomass variance.

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