%0 Journal Article
%T Effects of species diversity of litter on the ecological functions of Cunninghamia lanceolata (Lamb.) Hook. plantation soil<br>凋落物的树种多样性与杉木人工林土壤生态功能
%A WANG Silong
%A HUANG Zhiqun
%A WANG Qingkui
%A YU Xiaojun
%A <br>汪思龙
%A 黄志群
%A 王清奎
%A 于小军
%J 生态学报
%D 2005
%I 
%X Based on a field study and pot trial, the effects of species diversity of litter on the ecological functions of Cunninghamia lanceolata plantation forest soil were examined. In the field study, four plantation forest stands with similar site quality, one C. lanceolata pure stand and three of its mixed stands with Alnus cremastogyne, Kalopanax septemlobus, and Michelia macclurei, respectively, were investigated. Soil samples taken from each stand were analyzed for enzyme activity, total N, SOM, and total phenolics. A stand of nearby secondary evergreen broadleaved forest was also investigated and sampled as a control. A additional 7-mo pot trial was set up by incorporating the litter of several broadleaved tree species as well as C. lanceolata needle litter into potted soil planted with C. lanceolata saplings to compare the effects of litter species diversity on soil qualities. There were four different treatments with litter from four different species, given combinations of C. lanceolata litter with that of M. macclurei, Castanopsis carlesii, K. septemlobus. The soil of each pot was also treated with 200mg of (()~(15)NH 4) 2SO 4-N (with ()~(15)N abundance of 20.97%) to track the fate of labeled ()~(15)N under the effects of the mixed litter treatment. The results of the field study showed that the activity of urease and invertase in soil covered by C. lanceolata litter mixed with a broadleaved species within mixed plantations was significantly higher than the activities in soil covered by only C. lanceolata litter under its monoculture. The activity of acidic phosphatase in soil also changed in the same pattern among sampled forest stands. The activities of the three soil enzymes were greatest in the adjacent secondary evergreen broadleaved forest. In addition, the concentration of soil organic matter and total nitrogen increased in the mixed-species C. lanceolata plantation compared with the C. lanceolata monoculture. The results of the pot trial showed that although the concentration of (()~(15)NH 4) 2SO 4 in soil at the end of experiment increased, the loss of (()~(15)NH 4) 2SO 4 from the soil decreased as the number of species of litter in the mixture increased. The fresh weight and uptake of ()~(15)N by C. lanceolata saplings increased with the increase in the number of species of litter in the mixture (p<0.05).It is suggested that as the mixed-species litter was incorporated into the soil, there were significant improvements not only in the basic indices of soil quality such as soil organic matter and total nitrogen, but also in other soil quality indices such as the activity of soil enzyme, capacity of preserving soil nutrients and ensuring the growth of saplings in soil.
%K Cunninghamia lanceolata
%K species diversity of litter
%K soil ecological functions
%K monoculture<br>杉木
%K 凋落物树种多样性
%K 土壤生态功能
%K 纯林
%K 混交林
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=FDAB2326E6BAF112&yid=2DD7160C83D0ACED&vid=C5154311167311FE&iid=38B194292C032A66&sid=FE6B7E9BDCCDBAA6&eid=03436AC72A659ACA&journal_id=1000-0933&journal_name=生态学报&referenced_num=9&reference_num=22