论文部分内容阅读
采用放置不同孔径凋落袋(6目、30目和260目)的方法,研究了四川省乐山市苏稽镇不同比例巨桉(Eucalyptus grandis)与台湾桤木(Alnus formosana)混合凋落物的质量损失率及土壤动物群落结构的变化.结果表明:不同比例桉-桤混合凋落物均表现出前期分解迅速,后期分解较慢的规律.不同孔径凋落物袋中凋落物的分解率表现为6目最大,30目次之,260目最小.同孔径凋落物袋中不同比例桉-桤混合凋落物的分解速率也有不同,6目中各种凋落物分解时长相差较小,而30目和260目中纯巨桉、纯台湾桤木凋落物分解率达95%的时间之差分别为1175 d和908 d.凋落物分解过程中大型土壤动物类群结构发生了明显变化,分解初期主要为啮虫目,中期为后孔寡毛目,后期为鞘翅目,末期为双翅目.这些结果为进一步研究桉桤混交林物质循环提供了重要数据.
The quality loss of mixed litter with different proportions of Eucalyptus grandis and Alnus formosana in Suji County, Leshan City, Sichuan Province was studied by using the method of placing different diameter litter bags (6 mesh, 30 mesh and 260 mesh) And the change of soil animal community structure.The results showed that the mixed litter with different proportions of Eucalyptus urophylla 桤 showed rapid decomposition in the early stage and slow decomposition in the late stage.The decomposition rate of litter in different litter size litter bags was the largest , 30 mesh and 260 mesh.The decomposition rates of Eucalyptus-Lolium mixed litter in different litter size litter bags were also different, and the differences of litter decomposition time were smaller in 6-mesh, while those in 30-mesh and 260-mesh pure The difference of litter decomposition rates of giant eucalyptus and pure Taiwan alder was 95% for 1175 d and 908 d, respectively. The structure of macro-soil fauna changed significantly during litter decomposition, The latter hole Coleoptera, later coleoptera, the final dipterranles These results provide important data for further study of Eucalyptus and mixed forest material circulation.