干旱区生态环境知识资源中心(Arid): 盐池县不同沙化草地土壤特性

Arid

	盐池县不同沙化草地土壤特性
其他题名	Soil characteristics of different desertification grasslands in Yanchi County
	李侠; 李潮; 蒋进平; 许冬梅
来源期刊	草业科学
ISSN	1001-0629
出版年	2013
卷号	30 期号:11 页码:1704-1709
中文摘要	对盐池县潜在、轻度、中度、严重和极严重5种不同程度沙化草地土壤理化性质和土壤酶活性进行研究,以探讨草地沙化演变对土壤特性的影响。结果表明,土壤不同养分和酶活性随草地沙化程度的加重表现出不同的响应,但总体随着草地沙化程度的加重呈下降趋势。其中,土壤水分、全氮、碱解氮、全磷、速效磷及速效钾含量随沙化程度加重逐渐下降,且不同沙化程度草地之间差异显著(P<0.05);土壤有机碳含量由高到低为潜在沙化草地、中度沙化草地、极严重沙化草地、轻度沙化草地、严重沙化草地(P<0.05)。土壤蔗糖酶活性随草地沙化程度的加剧逐渐下降(P<0.05);过氧化氢酶活性自潜在沙化草地至严重沙化草地呈下降趋势,各沙化程度间差异不显著(P>0.05)。对两种酶活性与土壤理化性质的相关分析表明,蔗糖酶活性除与有机碳含量呈显著正相关(P<0.05)外,与其它养分含量呈极显著正相关(P<0.01)。过氧化氢酶活性与土壤全磷、全氮、碱解氮含量呈极显著正相关(P<0.01),与土壤全钾、速效钾、速效磷含量呈显著正相关(P<0.05),与土壤有机碳含量相关不显著(P>0.05)。
英文摘要	To study effects of grassland desertification on soil characteristics,physical and chemical properties of soils and soil enzyme activities of 5different desertification grasslands in Yanchi County,including potential desertification grassland,mild desertification grassland,moderate desertification grassland, severe desertification grassland and extremely severe desertification grassland,were analyzed in this study. Results showed that soil nutrients and enzyme activities responded differently to the aggravating of grassland desertification,but their responses trended decrease overall.Soil moisture,total N,available N,total P,available P and available K contents decreased with the aggravating of grassland desertification.There are significant differences among the same index of different desertification grasslands(P<0.05).The soil organic carbon and total P contents are potential desertification grassland>moderate desertification grassland> mild desertification grassland>extremely severe desertification grassland>severe desertification grassland(P<0.05).Soil invertase activity declined gradually with the aggravating of grassland desertification( P<0.05).And there is no significant difference among catalase activities of different desertification grasslands(P>0.05).Results of soil physical and chemical correlation analysis indicated that,soil invertase activity has significant positive correlation with organic carbon content(P<0.05),and extremely significant positive correlation with other nutrients contents(P<0.01).Catalase activity has extremely significant positive correlation with soil total P,total N,available N contents((P<0.01),significant positive correlation with soil total K,available K and available P contents(P<0.05),but no significant correlation with soil organic carbonate content(P>0.05).
中文关键词	草地沙化 ; 土壤理化性质 ; 土壤酶活性
英文关键词	grassland desertification soil nutrient content soil enzyme activity
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:4999770
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/2XILL650/229274
作者单位	宁夏大学农学院, 西北土地退化与生态恢复国家重点实验室培育基地, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	李侠,李潮,蒋进平,等. 盐池县不同沙化草地土壤特性[J]. 宁夏大学,2013,30(11):1704-1709.
APA	李侠,李潮,蒋进平,&许冬梅.(2013).盐池县不同沙化草地土壤特性.草业科学,30(11),1704-1709.
MLA	李侠,et al."盐池县不同沙化草地土壤特性".草业科学 30.11(2013):1704-1709.