干旱区生态环境知识资源中心(Arid): 黑河中游典型土地利用方式下土壤粒径分布及与有机碳的关系

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	黑河中游典型土地利用方式下土壤粒径分布及与有机碳的关系
其他题名	Soil particle size distribution and its relationship with soil organic carbons under different land uses in the middle of Heihe river
	张俊华 1; 李国栋 1; 南忠仁2
来源期刊	生态学报
ISSN	1000-0933
出版年	2012
卷号	32 期号:12 页码:3745-3753
中文摘要	土地利用方式是影响土壤粒径分布、土壤有机碳及其组成含量的重要因素。研究显示:黑河中游典型土地利用类型下,不同土壤粒径分布和土壤总有机碳(TOC)、活性有机碳(AOC)、非活性有机碳(NOC)的含量存在差异。剖面上TOC、AOC、NOC含量较高的旱地、水田、中覆盖度草地与含量较低的戈壁、裸土地、沙地、盐碱地相比,<1mum、15mum、510mum、1050mum的粒径含量较高,而50250mum、2501000mum的含量较低,这种变化以50mum为分界,分析表明<50mum的粉粒和粘粒可起到固碳作用,而50250mum、2501000mum的砂粒起碳损失作用。统计结果表明,以50mum为分界,水田、戈壁、中覆盖度草地剖面上TOC、AOC、NOC与15mum、510mum、1050mum呈正相关,与50250mum、2501000mum呈负相关。分析发现,粉粒和粘粒与土壤TOC、AOC、NOC的关系较显著,是影响和控制团聚体形成和稳定的重要因素。增加地表植被覆盖度、退化生态系统的植被恢复、农田耕种、防风固沙措施是提高土壤有机碳、粘粒和粉粒含量的方式,也为土壤团聚体的形成和稳定提供基础。
英文摘要	Land use plays an important role in soil particle size distribution,soil organic carbon(SOC) and its components.Based on the methods of field sampling,laboratory analysis and statistical analysis,soil particle size distribution and its relationship with SOC under different land uses are researched in the middle of Heihe river,which locates in Hexi corridor,Gansu province.We sampled the soil down to 100 cm in depth with interval of 020 cm,2040 cm,4060 cm,6080 cm and 80100 cm.Distribution of particle size under different land uses shows that percentage of the particle size <1,15,510 and 1050 mum for paddy field,dry land,nakedness land and middle density grassland are higher than those of the saline-alkali field,sandlot and desert,but percentage of the size 50250,250 1000 and 10003000 mum are inverse.In soil profile,average total organic carbon(TOC),active organic carbon(AOC) and nonactive organic carbon(NOC) contents for different land uses vary respectively with a range of 0.11%2.46%,0.06%0.78% and 0.05%1.68%,it is higher in the topsoil(020 cm) compared to that in the low depths(20100 cm),also TOC,AOC and NOC content gradually decline with the incremental depth.Results show soil particle size distribution and content of TOC,AOC and NOC have difference under different land uses.In the soil profile,average TOC,AOC and NOC contents are higher in dry land,paddy field and middle density grassland than in the desert,nakedness land,sandlot and saline-alkali field.The trends of soil particle size and SOC(TOC,AOC and NOC) have the similarities and differences,the similarities is percentage of particles <1,15,510 and 1050 in dry land,paddy field and middle density grassland that have high SOC(TOC,AOC and NOC) are higher than that in desert,nakedness land,sandlot and saline-alkali field that have low SOC,but the situation is opposite for particles 50250 and 2501000,the dividing point is 50.It is found that soil particle size under 50 mum play a role in carbon sequestration and soil particle size surpass 50 mum play a role in carbon loss.Statistics analysis show that SOC(TOC,AOC and NOC) in paddy field,desert and the middle density grassland have significant positive(P<0.01 or P<0.05) correlation with soil silt and claysize fractions under 50 mum size and significant negative relation(P<0.01 or P<0.05) with sand fractions surpass 50 mum size.The result show silt and claysize fractions play a major role in the formation and stabilization of soil aggregates.Measures of increasing vegetation coverage,vegetation restoration of degraded ecosystems,tillage,windbreak and sandfixing can enhance content of SOC,silt and claysize fractions,and further provide foundation and stability for soil aggregates formation.
中文关键词	土地利用 ; 土壤粒径分布 ; 土壤有机碳 ; 黑河
英文关键词	land use soil particle size distribution soil organic carbon Heihe river
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4555266
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228458
作者单位	1.河南大学资源与环境研究所, 开封, 河南 475000, 中国; 2.兰州大学资源环境学院, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张俊华,李国栋,南忠仁. 黑河中游典型土地利用方式下土壤粒径分布及与有机碳的关系[J]. 兰州大学,2012,32(12):3745-3753.
APA	张俊华,李国栋,&南忠仁.(2012).黑河中游典型土地利用方式下土壤粒径分布及与有机碳的关系.生态学报,32(12),3745-3753.
MLA	张俊华,et al."黑河中游典型土地利用方式下土壤粒径分布及与有机碳的关系".生态学报 32.12(2012):3745-3753.