浑河上游典型植被河岸带土壤有机碳、全氮和全磷分布特征  

Soil Organic Carbon,Total Nitrogen and Total Phosphorus Distribution of Typical Vegetation Riparian Zones in Upper Reaches of Hun River

作　　者：孔涛[1,2] 张德胜[3] 寇涌苹 刘民[1] 何志明[1] 

机构地区：[1]辽宁工程技术大学理学院,辽宁阜新123000 [2]中国科学院沈阳应用生态研究所,沈阳110016 [3]东北大学理学院,沈阳110819

出　　处：《土壤》2014年第5期793-798,共6页Soils

基　　金："十二五"国家科技支撑计划项目(2012BAD32B08;2011BAD38B0603)资助

摘　　要：河岸带是陆地生态系统和水生生态系统的过渡区,也是一个敏感和脆弱的生态区域。河岸带生态系统由于人类活动的干扰而严重退化,因而严重影响了河岸带土壤碳氮磷的循环过程。本文分析了浑河上游典型河岸带土壤有机碳、全氮和全磷含量及其空间分布特征,结果表明:1河岸带的灌丛草地、次生林、人工松林与玉米地相比,均能有效地提高0～40 cm土层的有机碳、全氮和全磷含量。2土壤有机碳、全氮和全磷含量随着土层的加深呈现降低的趋势,灌丛草地和次生林的土壤有机碳、全氮、全磷含量随着土层加深而降低的速率明显高于玉米地土壤。3在0～40 cm土壤剖面上,土壤有机碳平均含量从高到低依次为次生林(47.50 g/kg)、灌丛草地(44.50 g/kg)、人工松林(34.72 g/kg)、玉米地(15.09 g/kg);土壤全氮平均含量从高到低依次为次生林(2.53 g/kg)、灌丛草地(2.50 g/kg)、人工松林(2.40 g/kg)、玉米地(0.84 g/kg);土壤全磷平均含量从高到低依次为次生林(1.07 g/kg)、灌丛草地(1.05 g/kg)、人工松林(0.92 g/kg)、玉米地(0.65 g/kg)。Riparian zone is an ecological ecotone that occurs between river and terrestrial ecosystems and also is sensitive and vulnerable ecological niches. There exists a riparian ecosystem degradation because of people disturbance, which influences the cycling of soil carbon, nitrogen and phosphorus in the riparian zone. This paper analyzed the soil organic carbon, total nitrogen and total phosphorus distribution of typical vegetation riparian zones in upper reaches of Hun River. The results showed that all the natural shrub grassland, secondary forest, artificial pine forest could enhance the content of soil organic carbon, total nitrogen, total phosphorus in 0-40 cm layer compared with corn field. The soil organic carbon, total nitrogen, total phosphorus content decreased with the increase of soil depth. The rate of decrease in soil organic carbon, total nitrogen and total phosphorus with soil depth was significantly higher under natural shrub grasslands, secondary forest than under corn field. In 0-40 cm soil layer, the average content of soil organic carbon was highest under secondary forest （47.50 g/kg）, followed by natural shrub grasslands （44.50 g/kg）, artificial pine forest （34.72 g/kg） and then corn field （15.09 g/kg）. The average soil total nitrogen was highest under secondary forest （2.53 g/kg）, followed by natural shrub grasslands （2.50 g/kg）, artificial pine forest （2.40 g/kg） and then corn field （0.84 g/kg）. Also the average soil total phosphorus was highest under secondary forest （1.07 g/kg）, followed by natural shrub grasslands （1.05 g/kg）, artificial pine forest （0.92 g/kg） and the least under corn field （0.65 g/kg）.

关 键 词：河岸带 植被类型 土壤有机碳 土壤全氮 土壤全磷 

分 类 号：S181[农业科学—农业基础科学]