吉林龙湾国家级自然保护区凋落物分解主场效应研究

Study on the Main Field Effect of Litter Decomposition in Jilin Longwan National Nature Reserve

为了解吉林龙湾森林生态系统凋落物分解动态,本文采用4 mm网孔的网袋对保护区蒙古栎和核桃楸凋落物进行12个月主场及客场的分解试验,结果表明:截至到本试验结束分解12个月时,蒙古栎凋落物主场和客场分解速率分别为17.28%和24.90%,核桃楸凋落物主场和客场分解速率分别为19.62%和23.34%。蒙古栎凋落物5月、7月和10月的主场分解速率均低于客场分解速率。核桃楸凋落物5月的主场分解速率高于客场分解速率,7月和10月的主场分解速率低于客场分解速率。蒙古栎和核桃楸凋落物5月、7月和10月主场效应系数<0。蒙古栎和核桃楸凋落物分解主场效应为负效应,主要原因是分解者的特化作用。

In order to understand the dynamics of litter decomposition in the forest ecosystem of Longwan Jilin,the decomposition test of Quercus mongolica and Juglans mandshurica litter in the protected area was carried out for 12 months in the home and away fields using a mesh bag of 4 mm mesh. The results showed that the decomposition rates of the main and away fields of Quercus mongolica were 17. 28 % and 24. 90 % at the end of 12 months of decomposition,respectively. The decomposition rates of the main and away fields of Juglans mandshurica litter were 19. 62 % and 23. 34 %,respectively.The home decomposition rate of Quercus mongolica litter in May,July and October was lower than the decomposition rate of the away field. The main field decomposition rate of Juglans mandshurica litter in May was higher than that in the away field.The decomposition rate of home field in July and October was lower than that in the away field. The main field effect coefficient of Quercus mongolica and Juglans mandshurica litter in May,July and October was 0. The main field effect of litter decomposition of Quercus mongolica and Juglans mandshurica was negative,mainly due to the specialization of decomposers.