生态学报2009，Vol.29Issue(7)：3649-3657,9.
苏北大丰生态工程区两种植物群落土壤酶活性比较
Comparative studies on the soil enzymic activities of two plant communities in Dafeng ecological engineering wetland of Northern Jiangsu
摘要
Abstract
Soil enzyme plays an active role in the material circulation and energy flow of soil biochemical process. This article deals with the seasonal change of soil enzyme activities of phosphatase, urease and catalase in Phragmites communis and Spartina alterniflora communities in Dafeng coastal wetland after carrying out the eco-engineering with hydro-geomorphological modification. Meanwhile the relationship between the soil enzymic activitives and physical-chemical factors is discussed by correlation analysis. The results showed :(1) The seasonal variation curves of the soil phosphatase activity in two communities were all "single peak curves", while the soil catalase activity in two communities were all "single valley curves". The maximal soil phosphatase activity values and the minimum soil catalase activity values of both communities all appeared in summer (August). However, the soil urease activities of two communities changed erratically within a year. (2) The result from the correlation analysis showed there was significant positive correlation between the soil phosphatase activities and soil salinity, community biomass in Spartina alterniflora communities, while the correlation analysis between the soil catalase activities and two physical-chemical factors was vice versa. In Phragmites communis communities, the soil phosphatase activities had a significant positive correlation with organic matter and available P, while the soil catalase activities was vice versa. There was no correlation between the soil urease activities and all physical-chemical factors in both communities.(3) Path analysis between soil enzyme activities and soil phy-chemical factors showed that soil enzyme activities were the result of interactions among soil phy-chemical factors,and each factor acted differently in the two communities. In the S.alterniflora community, soil phy-chemical factors affecting phosphatase activity, urease activity and catalase activity decreased in the orders of soil salinity＞available K＞available P＞O.M.＞ammoniacal N, O.M. ＞available K＞available P＞soil salinity＞ammoniacal N and available K＞soil salinity＞O.M. ＞available P＞ammoniacal N. In the P.communis community, the orders were available P＞soil salinity＞O.M.＞ammoniacal N＞available K, O.M.＞available K＞soil salinity＞ammoniacal N＞available P and ammoniacal N＞available K＞soil salinity＞available P＞O.M..(4) The eco-engineering of hydro-geomorphological modification meliorated the coastal wetland soil to some extent, and it was propitious to substitute Phragmites communis community for Spartina alterniflora community.关键词
海滨湿地/芦苇群落/互花米草群落/土壤酶活性/土壤理化因子Key words
coastal wetland/Phragmites communis community/Spartina alterniflora community/soil enzymic activity/physical-chemical factors分类
生物科学引用本文复制引用
杨志勇,李刚,姚成,王光,钦佩..苏北大丰生态工程区两种植物群落土壤酶活性比较[J].生态学报,2009,29(7):3649-3657,9.基金项目
国家"十一五"科技支撑计划资助项目(2006BAD03A19) （2006BAD03A19）
国家908计划资助项目(JS-908-02-07) （JS-908-02-07）
