干旱区生态环境知识资源中心(Arid): 猫头刺群落对土壤养分空间异质性的响应

Arid

	猫头刺群落对土壤养分空间异质性的响应
其他题名	Response of Oxytropis aciphylla Community to Soil Nutrient Spatial Heterogeneity
	张宁; 滕玖琳; 何兴东; 王海涛; 高玉葆
ISSN	1000-694X
出版年	2008
卷号	28 期号:4 页码:706-711
中文摘要	选择腾格里沙漠边缘内蒙古阿拉善左旗境内的猫头刺群落为研究对象，探讨了猫头刺群落植物属性和土壤属性随尺度变化、空间异质性的变化以及植物属性对土壤属性空间异质性的响应。结果表明，尺度从800m~2增加到1600m~2，土壤有机质和土壤全氮的空间异质性减小，全磷和有效磷的空间异质性增加，有效氮空间异质性不变，而群落内3种植物密度和叶量的空间异质性基本都趋于增加，说明全磷和有效磷是目前猫头刺群落存在的主要限制因素，尤其是多年生草本植物骆驼蓬。进一步分析表明，这种现象是由于荒漠地区的灌丛沃岛效应和植物耗用有效磷以增大吸水力的补偿机制所致。
英文摘要	In the present study, a sampling plot of 20m* 80m in Oxytropis aciphylla community, which located on the eastern boundary of Tengger Desert in the Left Banner of Alashan League in Inner Mongolia, was chose to investigate the quantum feature of plant populations, measure soil total organic matter, total nitrogen, total phosphorus, available nitrogen and available phosphorus within 40 cm depth, and calculate spatial heterogeneity of regional variances of the soil and the vegetation and discuss their responses in accordance with scales. In the plot, there were 100 quadrats of 4m * 4m. Results showed that, as scale increase from 800 m~2 to 1 600 m~2, the spatial heterogeneities of soil organic matter and total nitrogen decreased, the total phosphorus and the available phosphorus increased, and that of available nitrogen remained constant. In the mean time, spatial heterogeneity of the density and the leaf biomass of all three plants increased. These suggested that total phosphorus and available phosphorus are generally the main factors restraining plant distribution in the O. aciphylla community, especially for perennial herbaceous plant Peganum harmala. Further analysis indicated these are caused by island effect of shrubs in the desert and the compensatory mechanism to raise plant suction force using available phosphorus.
中文关键词	干旱区 ; 猫头刺 ; 土壤理化特征 ; 空间异质性
英文关键词	arid area Oxytropis aciphylla community soil physiochemical properties spatial heterogeneity
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:3354499
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223158
作者单位	南开大学生命科学学院, 天津 300071, 中国
推荐引用方式 GB/T 7714	张宁,滕玖琳,何兴东,等. 猫头刺群落对土壤养分空间异质性的响应[J],2008,28(4):706-711.
APA	张宁,滕玖琳,何兴东,王海涛,&高玉葆.(2008).猫头刺群落对土壤养分空间异质性的响应.,28(4),706-711.
MLA	张宁,et al."猫头刺群落对土壤养分空间异质性的响应".28.4(2008):706-711.