干旱区生态环境知识资源中心(Arid): 荒漠草原中不同密度人工柠条灌丛土壤化学计量特征

Arid

	荒漠草原中不同密度人工柠条灌丛土壤化学计量特征
其他题名	Soil Stoichiometry Characteristics of Artificial Caragana Korshinskii Shrubs with Different Density in Desert Steppe
	杨阳; 刘秉儒; 杨新国; 韩丛丛
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2014
卷号	34 期号:5 页码:67-73
中文摘要	为了揭示人工灌草结合的生态系统土壤内部C,N,P平衡和循环过程,以荒漠草原为对照(CK),研究了相同林龄不同密度(高密度HD、中密度MD、低密度LD)人工柠条灌丛土壤化学计量特征。结果表明,柠条灌丛0100 cm土层平均有机碳(SOC)、全氮(TN),全磷(TP)和氮磷比(N/P)随密度的增加呈上升趋势,碳氮比(C/N),碳磷比(C/P)呈降低趋势,其中TP的空间变异性较高;垂直方向SOC,C/N和C/P随土层深度的增加呈单峰曲线,TN,TP和N/P在040 cm土层呈锐减趋势,40 cm土层以下缓慢降低并趋于稳定;040 cm土层TN和TP含量占总含量的61. 82%和55. 56%,可作为密度变化对人工柠条灌丛土壤养分的敏感指标;相关分析结果发现,人工柠条灌丛土壤N和P含量呈极显著正相关(p<0.01),二者均与C/N呈极显著的负相关(p<0.01),说明柠条对土壤中N和P两种元素需求相一致。
英文摘要	Taking the natural desert steppe as CK, soil stoichiometry characteristics of artificial Caragana korshinskii shrubs with different density (HD, MD, LD) of the same forest age were investigated to reveal soil C,N,P balance and internal circulation in artificial shrub-grass ecological system. The results showed that with the increase of the density, soil organic carbon(SOC),total nitrogen(TN),total phosphorus(TP) and ratio of nitrogen to phosphorus (N/P) in 0100 cm presented an increase trend, while the ratio of carbon to nitrogen(C/N) and carbon to phoshorus(C/P) presented a decrease trend, and the variation coefficient of TP was higher than other soil stoichiometry; Vertical direction SOC,C/N and C/P showed unimodal curve with the increase of soil depth, while TN, TP and N/P showed a sharply decrease trend in 040 cm soil layer with the increase of soil depth, but in 40-100 cm soil layer showed a slow decrease and tended to be stable. In 040 cm soil,TN and TP accounted for 61. 82% and 55. 56% of total content, and the content of TN and TP soil could be used as artificial C. microphylla shrubs sensitive index of soil nutrients; Correlation analysis showed that N content was positively linearly correlated with P content (p<0. 01),and both was significantly negative correlated with C/N(p<0. 01),and indicates consistent demand of N and P content in soil for C. microphylla shrubs.
中文关键词	荒漠草原 ; 人工柠条灌丛 ; 密度 ; 土壤化学计量特征
英文关键词	desert steppe artificial Caragana korshinskii shrubs density soil stoichiometry characteristics
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:5309358
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231751
作者单位	宁夏大学, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	杨阳,刘秉儒,杨新国,等. 荒漠草原中不同密度人工柠条灌丛土壤化学计量特征[J]. 宁夏大学,2014,34(5):67-73.
APA	杨阳,刘秉儒,杨新国,&韩丛丛.(2014).荒漠草原中不同密度人工柠条灌丛土壤化学计量特征.水土保持通报,34(5),67-73.
MLA	杨阳,et al."荒漠草原中不同密度人工柠条灌丛土壤化学计量特征".水土保持通报 34.5(2014):67-73.