干旱区生态环境知识资源中心(Arid): 干湿度梯度及植物生活型对土壤氮磷空间特征的影响

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	干湿度梯度及植物生活型对土壤氮磷空间特征的影响
其他题名	Effects of Humidity/Aridity Gradient and Vegetation Form on Spatial Characteristics of Soil Nitrogen and Phosphorus in China
	卢同平; 张文翔; 武梦娟; 林永静
来源期刊	土壤
ISSN	0253-9829
出版年	2017
卷号	49 期号:2 页码:364-370
中文摘要	通过对我国土壤氮磷含量及化学计量比值的分布特征研究,探讨了湿度梯度与植物生活型对土壤氮磷空间分布的影响.研究结果表明:中国陆地系统自然土壤氮、磷含量及氮磷比分别在0.02~ 8.78 g/kg, 0.05 ~ 1.73 g/kg和0.06 ~ 9.85范围内变化,地形和气候因素对其空间变异性的影响均较为显著.干湿度梯度分带对土壤氮含量和氮磷比值的影响较磷含量更为明显,氮含量与氮磷比呈现出明显的梯度变化特征,表现出湿润区>半湿润区>干旱区>半干旱区的规律,而磷含量变化不显著.在不同生活型植被土壤中,森林土壤氮磷的变化规律较灌木和草本土壤更为复杂;其植物磷平均含量低于全国平均值,说明森林生态系统植物受磷元素的限制作用与其较低的土壤磷含量供给有关.土壤氮磷含量和氮磷比与年均降水量和年均温度的相关性及逐步回归分析表明,土壤氮磷及其化学计量的变异性主要是受降水的影响.
英文摘要	In this paper, the impact of humidity/aridity gradient and vegetation form on the spatial distribution on soil nitrogen (N) and phosphorus (P) contents and N : P ratio in China were discussed. The results showed that N and P contents and N : P ratio of natural soil of terrestrial ecosystems in China were 0.02-8.78 g/kg, 0.05-1.73 g/kg and 0.06-9.85, respectively. The spatial variabilities of N and P contents and N : P ratio were further significantly influenced by topography and climate. Humidity/ aridity gradient had greater effect on N content and N : P than on P content. N content and N : P showed obvious gradient change characteristics with an order of humid region > semi-humid region > arid region > semi-arid region, while P content change was not significant. The variations of N and P in forest soil were more complex than those in shrub and herb. The average content of plant phosphorus was lower than the national average, may indicating forest ecosystem limited by P is attributed to low soil P content. Correlation and stepwise regression analyses proved precipitation controls the variation of N and P contents and N : P ratios.
中文关键词	干湿度梯度 ; 土壤氮磷 ; 植物生活型 ; 化学计量 ; 回归分析
英文关键词	Humidity/aridity gradient Soil N and P Vegetation form Ecological stoichiometry Regression analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5973874
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236754
作者单位	云南师范大学高原湖泊生态与全球变化实验室, 云南省高原地理过程与环境变化重点实验室, 昆明, 云南 650500, 中国
推荐引用方式 GB/T 7714	卢同平,张文翔,武梦娟,等. 干湿度梯度及植物生活型对土壤氮磷空间特征的影响[J],2017,49(2):364-370.
APA	卢同平,张文翔,武梦娟,&林永静.(2017).干湿度梯度及植物生活型对土壤氮磷空间特征的影响.土壤,49(2),364-370.
MLA	卢同平,et al."干湿度梯度及植物生活型对土壤氮磷空间特征的影响".土壤 49.2(2017):364-370.