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引用本文:白军红,邓伟,张玉霞.内蒙古乌兰泡湿地环带状植被区土壤有机质及全氮空间分异规律.湖泊科学,2002,14(2):145-151. DOI:10.18307/2002.0208
BAI Junhong,DENG Wei,ZHANG Yuxia.Spatial Distribution of Soil Organic Matter and Nitrogen in Soil of Circular-Zonary Vegetation Areas in Wulanpao Wetland, Inner Mongolia. J. Lake Sci.2002,14(2):145-151. DOI:10.18307/2002.0208
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内蒙古乌兰泡湿地环带状植被区土壤有机质及全氮空间分异规律
白军红, 邓伟, 张玉霞
中国科学院长春地理研究所湿地过程与环境开放实验室, 长春130021
摘要:
本文以乌兰泡湿地为研究对象,对该区环带状植被区湿地土壤有机质及全氮的空间分布规律进行了初步研究,结果表明不同植被区养分含量垂直分异趋势一致,但水平分异显著,沿土壤水分梯度变化而变化,表现为蓼区 >香蒲区 >芦苇区,反映出距泡心越远含量越低的规律;各植被区土壤碳氮比都相对较低 (在 5-12之间),表层土壤碳氮比值也沿土壤水分梯度变化,表现为芦苇区 >香蒲区 >蓼区;泡沼湿地土壤与草原土壤的碳氮比对水分条件及有机质和全氮的含量的响应差异显著;水分和植被是影响其水平分异的关键因子,而湿地土壤pH值并不是影响土壤有机质及全氮分异的主要因子.
关键词:  环带状植被区  湿地土壤  有机质  全氮  乌兰泡
DOI:10.18307/2002.0208
分类号:
基金项目:中国科学院湿地创新项目"中国典型湿地水陆相互作用过程、资源环境效应与调控(KZCX-302)";湖沼三期项目"松嫩平原霍林河流域沼泽资源环境动态效应与优化管理(ZKHZ-03-06)".联合赞助
Spatial Distribution of Soil Organic Matter and Nitrogen in Soil of Circular-Zonary Vegetation Areas in Wulanpao Wetland, Inner Mongolia
BAI Junhong, DENG Wei, ZHANG Yuxia
Lab for wetland process and environment, Changchun institute of Geography, CAS, Changchun 130021, P.R China
Abstract:
This paper investigates preliminarily spatial distribution of soil organic matter and nitrogen in wetland soil of circular distribtuion vegetation areas in Wulanpao Wetland, Inner Mongolia, which shows that vertical distribution of nutrients in different vegetation areas are of similar tendency but their horizontal distributions are very different, and they vary along the soil moisture gradient, that is, organic matter and nitrogen content decrease with the increase of distance to waters, Polygonaceae area >Thpya orientalis area >Phragmites cmmunis area.The ratio of carbon to nitrogen(C/N)ranges from 5 to 12, and C/N values also vary with moisture gradient, but variant tendency is opposite to that of SOM and TN content in the order Phragmites cmmunis area >Thpya orientalis area >Polygonaceae area;effects of moisture, soil organic matter and total nitrogen content on C/N values ofWetland soil and grassland soil are significantly different.Moisture and plant are the key factors influencing horizontal distributons of nutrients, but pH is not the one in this region.
Key words:  Circular-zonary vegetation areas  wetland soil  soil organic matter  total nitrogen  Wulanpao wetland
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