渭河湿地植物的热值研究

Analysis on Calorific Value of Plants in Weihe Wetland

湿地植物热值是湿地生态系统中能量转化评价的重要指标。利用氧弹式量热计对渭河湿地6种植物的热值和灰分含量进行了研究。结果表明,6种植物的干质量热值（GCV）在15.41-22.58 kJ/g之间,灰分含量在5.71%-7.80%之间,去灰分热值（AFCV）在16.71-24.05 kJ/g之间。对植物间热值进行比较,各植物的去灰分热值均大于其干质量热值。湿地植物的干重热值与灰分含量有较显著的线性相关。

The calorific value of plants is an important index to evaluate energy conversion of the wetland ecosystem. In this study,the caloric value and ash content of six kinds of plants in Weihe wetland were determined using combustion bomb calorimeter. The results showed that the gross caloric value of the six kinds of plants ranged from 15.41 kJ / g to 22.58 kJ / g,the ash content ranged from 5.71% to 7.80%,the ash free caloric value ranged from 16.71 kJ / g to 24.05 kJ / g. Through comparing the caloric value of the plant that the ash free caloric value higher than the gross caloric value. The gross caloric value and the ash content of wetland plants showed a relatively remarkable linear correlation.