浅埋对三倍体毛白杨落叶分解的影响  

Effects of shallow burial on the decomposition of triploid Populus tomentosa leaf litter

作　　者：宋曰钦[1] 董转年[1] 程开云 曹正东[1] 

机构地区：[1]黄山学院,安徽黄山245041 [2]黄山市徽州区林业局,安徽黄山245100

出　　处：《生态学杂志》2011年第9期1881-1885,共5页Chinese Journal of Ecology

基　　金：国家"十一五"科技支撑项目(2006BAD3202-2);黄山学院启动项目(2009xkjq003)资助

摘　　要：凋落物分解在森林生态系统养分循环及能量流动中具有十分重要的作用,为实现三倍体毛白杨纸浆林养分的科学管理,加快落叶分解,采用网袋法研究了2、4、6年生3个不同年龄的林分落叶在浅埋条件下的分解情况。结果表明:与在地表分解相比,浅埋显著促进了三倍体毛白杨落叶的分解,1年的分解率显著提高,分别为落叶在地表年分解率的130%、194%和186%;浅埋落叶分解50%所需天数分别只有地表的58%、39%和38%,而分解95%所需的天数分别只有地表的60%、38%和36%;浅埋对不同年龄林分落叶的促进程度不同。Litter decomposition plays an important role in the nutrient cycling and energy transfer in forest ecosystems. By using litterbag method, this paper studied the leaf litter decomposition in 2-, 4-, and 6 years old Populus tomentosa pulp plantations under the condition of shallow burial, aimed to realize the scientific management of nutrients and to accelerate the decomposition of leaf litter in triploid P. tomentosa pulp plantations. Shallow burial promoted the leaf litter decomposi- tion significantly, as compared to the decomposition on soil surface. The decomposition rate of the leaf litters in 2-, 4-, and 6 years old P. tomentosa pulp plantations under shallow burial for one year increased significantly, being 130% , 194%, and 186% of that on soil surface, respec- tively. Compared with the decomposition on soil surface, the days needed for 50% leaf litter decomposition in 2-, 4-, and 6 years old triploid P. tomentosa pulp plantations under shallow burial were shortened by 58% , 39% , and 38% , and those needed for 95% decomposition were shortened by 60% , 38% and 36% , respectively, indicating that the promotion effect of shallow burial on the leaf litter decomposition differed with triploid P. tomentosa plantation age.

关 键 词：落叶 浅埋 网袋法 分解率 

分 类 号：S718.5[农业科学—林学]