干旱区生态环境知识资源中心(Arid): 准噶尔盆地南缘绿洲-荒漠过渡带梭梭"肥岛"效应特征

Arid

	准噶尔盆地南缘绿洲-荒漠过渡带梭梭"肥岛"效应特征
其他题名	The Characteristics of "Fertile Island" on Haloxylon ammodendron at an Oasis-desert Ecotone in the South Edge of Junggar Basin
	任雪; 褚贵新; 宋日权; 王国栋; 乔旭
来源期刊	土壤通报
ISSN	0564-3945
出版年	2010
卷号	41 期号:1 页码:100-104
中文摘要	通过野外调查取样和室内分析的方法研究了绿洲-荒漠过渡带典型灌木梭梭的灌丛下,灌丛间不同层次土壤养分、盐分的差异,旨在揭示干旱荒漠区灌丛的"肥岛"效应特征.结果表明:(1)灌丛下土壤有机质、全氮、碱解氮和速效钾都明显高于灌丛问的,其中表层(0～10 cm)土壤分别比灌丛间的高83.1%、113.5%、44.6%、111.8%,土壤电导率提高了167.7%,土壤养分在灌丛下聚集,并且表层含量最高,形成灌丛的"肥岛效应",从而使灌丛植被所覆盖土壤的肥力性状明显区别于未受灌丛影响的土壤.(2)沙漠腹地的土壤养分富集率大于沙漠边缘,其"肥岛"效应也明显大于沙漠边缘的,灌丛土壤全氮和速效磷的富集率较沙漠分别高了25.3%和15.1%.沙漠腹地灌丛下土壤养分的富集程度高可能是荒漠植被适应逆境的一种机制,有利于荒漠植被的生长繁殖和干旱区绿洲生态屏障的形成.
英文摘要	Field investigation was conducted to explain the effects of "Fertile Island" of one typical deciduous desert shrub Haloxylon ammodendron and its ecological factions in desert environment, at an oasis-desert ecotone in the South Gurbantonggut desert. The results showed as follow: (1) The content of organic matter, total N, alkali-available nitrogen, available K and soil electrical conductivity value(EC) were significantly greater in topsoil (0 - 10 cm) under the canopy of shrubs than those in topsoil from adjacent interspaces and increased by 83.1%, 113.5%, 44.6%, 111.8%, 167.7%, respectively, compared with those of the soil in open spaces. There was no significant difference in pH between the soils under shrub canopies in open land. There existed an obvious "Fertile Island" phenomenon. (2) Soil nutrition enrichment ratio was higher in desert hinterland than that in desert fringe, namely, the enrichment ratio of total N and available K in topsoil increased by 25.3% and 15.1% respectively, compared with those in desert edge. It could be deduced that sandy plant formatted higher soil nutrition enrichment ratio under shrub canopy could be an effective adaptation mechanism to the environmental stress in desert environment. Soil nutrition element accumulation under shrub canopy benefited to sandy plant growth and development, as well as protection oasis in arid region.
中文关键词	荒漠 ; 梭梭(Haloxylon ; "肥岛"效应 ; 土壤养分
英文关键词	ammodendron) Desert area Haloxylon ammodendron "Fertile Island" Soil nutrients
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:3871351
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225720
作者单位	新疆生产建设兵团, 绿洲生态农业重点实验室, 石河子, 新疆 832000, 中国
推荐引用方式 GB/T 7714	任雪,褚贵新,宋日权,等. 准噶尔盆地南缘绿洲-荒漠过渡带梭梭"肥岛"效应特征[J],2010,41(1):100-104.
APA	任雪,褚贵新,宋日权,王国栋,&乔旭.(2010).准噶尔盆地南缘绿洲-荒漠过渡带梭梭"肥岛"效应特征.土壤通报,41(1),100-104.
MLA	任雪,et al."准噶尔盆地南缘绿洲-荒漠过渡带梭梭"肥岛"效应特征".土壤通报 41.1(2010):100-104.