生态学报2018，Vol.38Issue(7)：2308-2314,7.DOI:10.5846/stxb201705150893
放牧对滇西北高原纳帕海沼泽化草甸湿地土壤氮转化的影响
Effects of grazing on nitrogen transformation in swamp meadow wetland soils in Napahai of Northwest Yunnan
摘要
Abstract
In this study,the typical swamp meadow wetland in Napahai,a Wetland of International Importance,in Northwest Yunnan was selected as the research site.Nitrogen transformations in swamp meadow wetland soils under the influence of grazing disturbance were measured and analyzed using in situ column interior control experiment methods.The results showed that the soil bulk density and pH were increased,and the soil moisture content,total organic carbon content,total nitrogen content,and NH4+-N content were decreased in surface soils with grazing disturbance.The mineralization and nitrification rates of swamp meadow wetland soils with the influence of grazing disturbance showed a significant decrease:pig arch ＞ cattle-trampled ＞ control.Both pig arch and cattle-trampled sites enhanced the mineralization and nitrification rates.Denitrification rates of swamp meadow wetland soils with the influence of grazing disturbance showed a significant decrease:pig arch ＞ control ＞ cattle-trampled (P＜0.05).Pig arch sites promoted N2O release but cattle-trampled sites inhibited N2O release.In contrast,both the mineralization and nitrification rates of swamp meadow wetland soils with the grazing disturbance had a significant positive correlation with soil bulk density and pH,and a significant negative correlation with soil moisture content,NH4+-N content,TOC,and TN.Denitrification rate had a significant negative correlation with TOC.关键词
纳帕海/放牧干扰/矿化作用/硝化作用/反硝化作用Key words
Napahai/grazing disturbance/mineralization/nitrification/denitrification引用本文复制引用
王雪,郭雪莲,郑荣波,王山峰,刘双圆,田伟..放牧对滇西北高原纳帕海沼泽化草甸湿地土壤氮转化的影响[J].生态学报,2018,38(7):2308-2314,7.基金项目
国家自然科学基金项目(41563008,41001332) （41563008,41001332）
云南纳帕海国际重要湿地2015年生态效益补偿试点项目 （）
