干旱区生态环境知识资源中心(Arid): 荒漠草原沙漠化对土壤物理和化学特性的影响

Arid

	荒漠草原沙漠化对土壤物理和化学特性的影响
其他题名	Effects of Desertification on Soil Physiochemical Properties of Desert Grassland
	阎欣; 安慧; 刘任涛
来源期刊	土壤
ISSN	0253-9829
出版年	2019
卷号	51 期号:5 页码:1006-1012
中文摘要	以宁夏中北部荒漠草原不同沙漠化阶段(荒漠草地、固定沙地、半固定沙地、流动沙地)草地土壤为研究对象,研究不同沙漠化阶段土壤容重、孔隙度、土壤有机碳、全氮含量、碳密度、氮密度、NH_4~+-N和NO_3~--N的变异规律,分析荒漠草原沙漠化对土壤物理和化学性质的影响。结果表明:固定沙地、半固定沙地和流动沙地0 ~ 30 cm土层土壤容重较荒漠草地分别升高了0.3%、2.9%和2.4%。土壤孔隙度随草地沙漠化加重整体表现为线性递减趋势。同一沙漠化阶段,随着土层深度的增加,土壤容重表现出先降低后升高趋势,而土壤孔隙度表现出相反的变化。随着荒漠草原沙漠化程度加剧,NH_4~+-N、NO_3~--N、土壤有机碳、全氮含量和碳氮密度均呈线性下降趋势。与荒漠草地相比,流动沙地0~30cm土层土壤NH_4~+-N、NO_3~--N、土壤有机碳、全氮含量和碳氮密度分别降低了27.4%、31.8%, 44.8%、56.7%、43.5%和55.7%。荒漠草原沙漠化破坏了土壤物理和化学性状。
英文摘要	The effects of different desertification stages (grasslands, fixed dunes, semi-fixed, mobile dunes) on soil bulk density, porosity, the contents and densities of organic carbon and total nitrogen, and the contents of ammonium nitrogen and nitrate nitrogen were studied in desert grassland located in north central Ningxia, China. The results showed that desertification of desert grassland had significant effects on soil physiochemical properties. As compared with grasslands, soil bulk densities of the fixed, semi-fixed and mobile dunes were increased by 0.3%, 2.9% and 2.4%, respectively. Soil porosity gradually decreased with increasing desertification stage. With the increase of soil depth, soil bulk density increased first, and then decreased under different desertification stages, but soil porosity first decreased and then increased. The contents of ammonium nitrogen, nitrate nitrogen, organic carbon and total nitrogen, and the densities of organic carbon and total nitrogen decreased gradually during the desertification process. As compared with grasslands, the contents of ammonium nitrogen and nitrate nitrogen, the contents and densities of organic carbon and total nitrogen in mobile dunes were increased by 27.4%, 31.8%, 44.8%, 56.7%, 43.5% and 55.7%, respectively. The above results suggested that desertification of desert grassland can deteriorate soil physiochemical properties.
中文关键词	土壤 ; 理化特性 ; 沙漠化 ; 荒漠草原
英文关键词	Soil Physiochemical properties Desertification Desert grassland
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6610826
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315787
作者单位	宁夏大学, 西北土地退化与生态恢复宁夏省省部共建国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	阎欣,安慧,刘任涛. 荒漠草原沙漠化对土壤物理和化学特性的影响[J]. 宁夏大学,2019,51(5):1006-1012.
APA	阎欣,安慧,&刘任涛.(2019).荒漠草原沙漠化对土壤物理和化学特性的影响.土壤,51(5),1006-1012.
MLA	阎欣,et al."荒漠草原沙漠化对土壤物理和化学特性的影响".土壤 51.5(2019):1006-1012.