【摘要】 测定吉林省东部山区5种阔叶乔木树种叶的热值和灰分,探讨植物叶片热值和灰分月变化及二者的相关性.结果表明:5种主要阔叶乔木树种叶的干重热值在不同月份有较大差异,水曲柳、蒙古栎、黄檗叶干重热值最大值出现在5月,依次为(20.23±0.06)、(20.09±0.06)和(20.86±0.07) kJ/g,紫椴叶干重热值最大值出现在6月,为(19.62±0.13) kJ/g,胡桃楸叶干重热值最大值出现在7月,为(20.56±0.11) kJ/g.从全年叶平均干重热值看,各树种干重热值顺序为胡桃楸(19.71±0.69) kJ/g>蒙古栎(19.38±0.48) kJ/g>紫椴(19.28±0.22) kJ/g>黄檗(19.25±1.05) kJ/g>水曲柳(18.76±0.94) kJ/g.灰分含量月变化趋势并不完全一致,进入衰老期,有不断升高的趋势.胡桃楸、水曲柳、黄檗的干重热值与灰分含量极显著线性负相关(P<0.01),蒙古栎的干重热值与灰分含量显著线性负相关(P<0.05),紫椴的干重热值与灰分含量显著线性正相关(P<0.05).去灰分热值与干重热值月变化趋势不同是由于灰分含量不同导致的.更多还原

【Abstract】 Leaf calorific value and ash content of five dominant broad leaved tree species in eastern Jilin Province( Fraxinus mandshurica,Quercus mongolica,Juglans mandshurica,Tilia amurensis,Phellodendron amurense) were measured to elaborate monthly dynamics and correlation. Results have shown that gross caloric value of the five dominant broad leaved tree species differs markedly in different months,maximum gross caloric value of Fraxinus mandshurica,Quercus mongolica,Phellodendron amurense indicated in May,in turn being( 20. 23 ±0. 06),( 20. 09 ±0. 06) and( 20. 86 ± 0. 07) k J/g. Maximum gross caloric value of Tilia amurensis indicated in June,being( 19. 62± 0. 13) k J/g,Juglans mandshurica in July,being( 20. 56 ± 0. 11) k J/g. From the annual average perspective,gross caloric value of the five species went from big to small in order: Juglans mandshurica( 19. 71 ±0. 69) k J/g > Quercus mongolica( 19. 38 ±0. 48) k J/g > Tilia amurensis( 19. 28 ±0. 22) k J/g > Phellodendron amurense( 19. 25 ±1. 05) k J/g > Fraxinus mandshurica( 18. 76 ±0. 94) k J/g. Monthly dynamics of ash content were not completely in accordance with those of gross caloric value. However,with the species aging,ash content continuously went up. Gross caloric value and ash content of Juglans mandshurica,Fraxinus mandshurica,Phellodendron amurense had significant linear negative correlation( P < 0. 01). Gross caloric value and ash content of Quercus mongolica had significant linear negative correlation( P <0. 05). Gross caloric value and ash content of Tilia amurensis had significant linear positive correlation( P<0. 05). Different ash content had caused difference in the annual dynamics of ash free caloric value and gross caloric value.更多还原