[Objective]The aim of this study was to reveal the relationship between the reed and salinity in severely salinized area,so as to making clear the vertical distribution of underground biomass of reed.[Method]Field inv...[Objective]The aim of this study was to reveal the relationship between the reed and salinity in severely salinized area,so as to making clear the vertical distribution of underground biomass of reed.[Method]Field investigation and sampling method were used to get the mass accurate data of underground biomass of reed.further its vertical distribution was analyzed using combined statistical and ecological method.Moreover,the C/N ratio was obtained by measuring the contents of organic carbon and nitrogen in reed wetland soil.The correlation model among organic carbon,nitrogen of reed wetlands and C/N were finally analyzed.[Result]Total underground biomass of reed population is concentrated at 10 to 40 cm underground soil layer.Thick root plays crucial role in the composition of reed total biomass,Overall change of organic carbon and total nitrogen shows a declining trend.The content of organic carbon and nitrogen in soils becpmes stable below 50 cm from the surface.The content of organic carbon in soil is positively correlated with total nitrogen in soil at significant level.[Conclusion]These results provided theoretical basis for revealing underground biomass of reed in salinized area of arid region.展开更多
This article, by combining field investigation with laboratorial analysis, studies diverse alpine meadow at the Eastern Margin of the Qinghai-Tibet Plateau for the underground biomass dynamics, vertical distribution o...This article, by combining field investigation with laboratorial analysis, studies diverse alpine meadow at the Eastern Margin of the Qinghai-Tibet Plateau for the underground biomass dynamics, vertical distribution of the content of soil carbon and nitrogen, the connection between the biomass and the content of carbon and nitrogen. The studies show that underground biomass in the herb layer of upland meadow is more than that in the terrace meadow, while underground biomass in the upland shrubland is the most. The vertical distribution of underground biomass of each type is obvious as in shape of＂T＂. As to the distribution of the content of soil organic carbon in the three sample grounds, it showed that the deeper the soil the less the content of soil organic carbon. In May, unlike at terrace meadow, the underground biomass and the content of soil organic carbon in positive proportion, such revelation at upland meadow and upland shrubland is not apparent. In July, at upland meadow and terrace meadow the underground biomass and the content of soil total nitrogen in positive proportion, such revelation at upland shrubland is not apparent either.展开更多
基金Supported by Land Use and Sustainable Development Research on Tarim Euphrates Poplar National Nature Reserve of Tarim Lake in Xinjiang(I/78636)~~
文摘[Objective]The aim of this study was to reveal the relationship between the reed and salinity in severely salinized area,so as to making clear the vertical distribution of underground biomass of reed.[Method]Field investigation and sampling method were used to get the mass accurate data of underground biomass of reed.further its vertical distribution was analyzed using combined statistical and ecological method.Moreover,the C/N ratio was obtained by measuring the contents of organic carbon and nitrogen in reed wetland soil.The correlation model among organic carbon,nitrogen of reed wetlands and C/N were finally analyzed.[Result]Total underground biomass of reed population is concentrated at 10 to 40 cm underground soil layer.Thick root plays crucial role in the composition of reed total biomass,Overall change of organic carbon and total nitrogen shows a declining trend.The content of organic carbon and nitrogen in soils becpmes stable below 50 cm from the surface.The content of organic carbon in soil is positively correlated with total nitrogen in soil at significant level.[Conclusion]These results provided theoretical basis for revealing underground biomass of reed in salinized area of arid region.
基金the key Item of Sichuan Education Depart-ment (2006A070)
文摘This article, by combining field investigation with laboratorial analysis, studies diverse alpine meadow at the Eastern Margin of the Qinghai-Tibet Plateau for the underground biomass dynamics, vertical distribution of the content of soil carbon and nitrogen, the connection between the biomass and the content of carbon and nitrogen. The studies show that underground biomass in the herb layer of upland meadow is more than that in the terrace meadow, while underground biomass in the upland shrubland is the most. The vertical distribution of underground biomass of each type is obvious as in shape of＂T＂. As to the distribution of the content of soil organic carbon in the three sample grounds, it showed that the deeper the soil the less the content of soil organic carbon. In May, unlike at terrace meadow, the underground biomass and the content of soil organic carbon in positive proportion, such revelation at upland meadow and upland shrubland is not apparent. In July, at upland meadow and terrace meadow the underground biomass and the content of soil total nitrogen in positive proportion, such revelation at upland shrubland is not apparent either.
