干旱区生态环境知识资源中心(Arid): 不同质地土壤中荒漠灌木梭梭肥岛的初步探讨

Arid

	不同质地土壤中荒漠灌木梭梭肥岛的初步探讨
其他题名	Preliminary Studies on Haloxylon Ammodendron ’Fertile Islands’ in Desert Soils Different in Texture
	曹艳峰 1; 丁俊祥 2; 于亚军 3; 黄刚 2
来源期刊	土壤学报
ISSN	0564-3929
出版年	2016
卷号	53 期号:1 页码:261-270
中文摘要	为检验荒漠灌木肥岛是否受土壤质地调节,本研究选取了中亚干旱区梭梭(Haloxylon ammodendron (С. А. Mey.))的两种原生生境:古尔班通古特沙漠的风沙土和绿洲区的灰漠土。两种土壤的质地有显著差异,风沙土中砂粒含量是灰漠土的2.1倍~ 2.4倍,而灰漠土中粉粒和黏粒含量分别是风沙土的3.0倍~ 3.6倍、2.9倍~5.1倍。通过对比分析两种土壤中梭梭冠下水分和养分的空间变异特征,获得了如下结果:两种土壤中均存在灌木肥岛效应,且随深度增加而减弱;在0~20cm土层,与灰漠土相比,风沙土中冠下水分和养分的空间异质性更强,富集程度更高,风沙土中水分、有机质、有效氮和有效磷的富集率分别是灰漠土的4.6倍~ 12.3倍、3.4倍~8.6倍、3.0倍~4.9倍和2.1倍~2.6倍。本研究表明,两种土壤均存在灌木肥岛效应,而土壤质地可能决定了肥岛效应的强弱程度。
英文摘要	In arid and semi-arid ecosystems, shrubs often create patches of soil underneath spatially heterogenous in distribution of soil water and nutrients, which are called fertile islands" or "resource islands",. Although the so-called fertile island" is a phenomenon of spatial heterogeneity in distribution of soil water and nutrients at a plant scale, it may have some great impacts on vegetation distribution, productivity and evolution processes (like desertification) of the ecosystem. Therefore, the phenomenon of "fertile islands" has attracted more and more attention from more and more researchers. So far, researches have demonstrated that distribution pattern of the soil resources underneath shrub canopies was related to soil depth, plant species, plant development stage and spatial scales (e.g., rhizosphere, individual, population, geomorphology, and region). However, little has been reported on spatial pattern of soil resources relative to soil textured soil, especially in desert soils. This calls for further attention. In this study, two different types of native habitats of Haloxylon ammodendron in the Junggar Basin were selected:the Gurbantonggut Desert and nearby oasis. Haloxylon ammodendron is a dominant species in arid regions of Central Asian, playing a key role in maintaining structure and functions of these desert ecosystems. Aeolian sandy soil and grey desert soil are the zonal soils of the two habitats and have developed under the same climatic conditions and experienced the same weather process, but are markedly different in mechanical composition even though they are only 8 km apart. Specifically, the aeolian sandy soil is of loamy fine sand soil, and the grey desert soil is silt loam soil. The former is 2.1 ~2.4 times as high as the latter in sand content, while the latter is 3.0 ~3.6 and 2.9 ~5.1 times as high as the former in silt and clay content,respectively. This provides an ideal environment for determining whether the effect of individual plants on spatial variability of soil properties under their canopies might be mediated by soil texture. In each of the two native habitats, eight Haloxylon ammodendron plants similar in size (about 200 cm in plant height, about 10 cm in basal diameter and about 100 cm crown radius) were selected. For soil sampling, the soil under each plant was divided vertically into three soil layers, 0 ~ 20, 20 ~60,and 60 ~100 cm.
中文关键词	荒漠土壤 ; 梭梭 ; 肥岛 ; 土壤质地
英文关键词	Desert soils Haloxylon ammodendron Fertile islands Soil texture
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:5625755
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235090
作者单位	1.山西师范大学地理科学学院, 中国科学院绿洲与荒漠重点实验室, 临汾, 山西 041000, 中国; 2.中国科学院新疆生态与地理研究所, 中国科学院绿洲与荒漠重点实验室, 乌鲁木齐, 新疆 830011, 中国; 3.山西师范大学地理科学学院, 临汾, 山西 041000, 中国
推荐引用方式 GB/T 7714	曹艳峰,丁俊祥,于亚军,等. 不同质地土壤中荒漠灌木梭梭肥岛的初步探讨[J]. 中国科学院新疆生态与地理研究所,2016,53(1):261-270.
APA	曹艳峰,丁俊祥,于亚军,&黄刚.(2016).不同质地土壤中荒漠灌木梭梭肥岛的初步探讨.土壤学报,53(1),261-270.
MLA	曹艳峰,et al."不同质地土壤中荒漠灌木梭梭肥岛的初步探讨".土壤学报 53.1(2016):261-270.