干旱区生态环境知识资源中心(Arid): 灌丛化对贺兰山西坡草场土壤异质性的影响

Arid

	灌丛化对贺兰山西坡草场土壤异质性的影响
其他题名	The Effects of Shrub Patches on Soil Heterogeneity in Grasslands on the West Slope of the Helan Mountain
	郑敬刚 1; 张本昀 2; 何明珠 3; 保平 4; 张宝华 4; 李新荣3
ISSN	1001-4675
出版年	2009
卷号	26 期号:1 页码:26-31
中文摘要	以贺兰山西坡哈拉乌北沟为例,研究了干旱区灌丛化草场的土壤水分、养分空间分布特征.结果表明:灌丛化显著促进了干旱区草场的土壤养分富集,提高了小尺度的土壤异质性.地统计学分析也表明:0～20 cm的土壤水分、总氮、有机质和pH的空间自相关距离均大于灌丛的平均冠幅(3012.3)cm,但远小于对照草场相应土壤理化性质的空间分布范围,揭示出灌丛化样地土壤理化性质的分布可能伴随着灌丛尺度上的生物作用过程.
英文摘要	The Helan Mountain is located in an inland region with a continental climate; therefore, it is arid and cold in winter, but arid and hot in summer. The prevailing wind direction in winter is NW, the annual temperature ranges from 8.2 ℃ to 8.6 ℃, the annual accumulated temperature ≥10 ℃ is 511.3 ℃, the annual precipitation ranges from 250 mm to 438 mm, but the annual evaporation is as high as 1 600 ～ 1 800 mm, and the frost free period lasts from 110 to 130 days. Here, a case study of the spatial distribution of soil moisture and nutrients in the arid shrub patches on the west slope of the Helan Mountain is presented. The results of this study demonstrate that shrub patches can promote significant nutrient enrichment, an increase in the moisture content of the topsoil and an increase in the microscale heterogeneity of the soil in the arid shrub patches. Geostatistical analysis revealed that the autocorrelation distances of soil properties such as soil moisture content, total nitrogen and organic matter and pH were further than the mean canopy size of Salsola passerina (30 12.3 ) cm, but much smaller than the spatial distribution of the corresponding soil properties in the enclosure grasslands. Taken together, these findings suggest that the spatial distribution of soil properties may be accompanied by biotic processes in shrub patches.
中文关键词	灌丛化 ; 草场 ; 土壤异质性 ; 地统计学 ; 贺兰山
英文关键词	shrub expansion soil heterogeneity geostatistical analysis Helan Mountain
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:3564376
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223589
作者单位	1.许昌学院,城市与环境学院, 许昌, 河南 461000, 中国; 2.许昌学院城市与环境学院, 许昌, 河南 461000, 中国; 3.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 4.内蒙古阿拉善左旗草原站, 巴彦浩特, 内蒙古 750306, 中国
推荐引用方式 GB/T 7714	郑敬刚,张本昀,何明珠,等. 灌丛化对贺兰山西坡草场土壤异质性的影响[J]. 中国科学院西北生态环境资源研究院,2009,26(1):26-31.
APA	郑敬刚,张本昀,何明珠,保平,张宝华,&李新荣.(2009).灌丛化对贺兰山西坡草场土壤异质性的影响.,26(1),26-31.
MLA	郑敬刚,et al."灌丛化对贺兰山西坡草场土壤异质性的影响".26.1(2009):26-31.