干旱区生态环境知识资源中心(Arid): 内蒙古乌兰布和沙漠样中磷形态分析及生物可获磷研究

Arid

	内蒙古乌兰布和沙漠样中磷形态分析及生物可获磷研究
其他题名	Forms and Bioavailability of Phosphorus in Sand Samples From Wulanbuhe Desert
	李北罡; 马钦; 郭博书
ISSN	1673-4831
出版年	2008
卷号	24 期号:3 页码:86-88,93
中文摘要	采用6步连续提取法对采集于乌兰布沙漠磴口段沙样中磷的各种存在形态进行了分析测定,并对沙样进行了分级形态研究及生物可利用磷的估算.结果表明:在所取沙样中总磷(P_i)平均含量为251.32mug·g~(-1),其主要成分为无机磷(IP),占P_i含量的96.2%;有机磷(Or-P)占P_i的3.8%.在所有不同粒径沙样中,钙结合态磷(Ca-P)含量最高,平均为233.72mug·g~(-1),占P_i的93.0%;其他各形态磷含量的高低顺序依次为:有机磷(Or-P)、铁结合态磷(Fe-P)、弱吸附态磷(Ads-P)、铝结合态磷(Al-P)、闭蓄态磷(Obs-P).在所取沙漠颗粒物样中,P_i、Ca-P、Fe-P含量均随沙样粒径的减小而增大,其中P_i、Ca-P的变化幅度较大,而Fe-P的变化幅度较小;Or-P含量随粒径的减小而降低;Ads-P、Obs-P、Al-P含量随粒径变化的规律性不强.所取沙样中潜在的生物可获得磷的量约占总磷的6.6%.
英文摘要	Sand samples were collected from Dengkou Section of the Wulanbuhe Desert,Inner Mongolia for analysis of forms and bioavailability of phosphorus with the six-step sequential extraction method and for classification of the sands. Results show that contents of total phosphorus (P_i) in the samples ranged from 172.88 to 316.67 mug·g~(-1),with a mean of 251.32 mug.g~(-1). The mean value of inorganic P(IP) and organic P (Or-P) content was accounting for 96.2% of P_i and for 3.8% of P_i,respectively. Ca-bound P was found to be the most abundant with a mean value being 233.72 mug.g~(-1) (accounting for 93.0% of P_i) in sand grains of all particle size fractions. The other forms of P followed a decreasing order of Or-P>Fe-P>Ads-P>Al-P>Obs-P in content. In the sand samples,contents of Ca-P,Fe-P and P_i increased with decreasing of particle size,but Or-P was on the contrary,and no remarkable dependency relationship between content and sand particle size for Al-P,Ads-P and Obs-P was found. The quantity of bioavailable P was estimated at about 6.6% of P_i and this fraction of P pool that actually is bioavailable under natural conditions will vary with natural water systems depending on a number of primarily physical and chemical environmental factors.
中文关键词	乌兰布和沙漠 ; 磷 ; 形态 ; 粒径 ; 生物可获得性
英文关键词	Wulanbuhe Desert phosphorus chemical form particle size bioavailability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CHEMISTRY MULTIDISCIPLINARY
WOS研究方向	Chemistry
CSCD记录号	CSCD:3336791
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222726
作者单位	内蒙古师范大学,化学与环境科学学院, 呼和浩特, 内蒙古 010022, 中国
推荐引用方式 GB/T 7714	李北罡,马钦,郭博书. 内蒙古乌兰布和沙漠样中磷形态分析及生物可获磷研究[J],2008,24(3):86-88,93.
APA	李北罡,马钦,&郭博书.(2008).内蒙古乌兰布和沙漠样中磷形态分析及生物可获磷研究.,24(3),86-88,93.
MLA	李北罡,et al."内蒙古乌兰布和沙漠样中磷形态分析及生物可获磷研究".24.3(2008):86-88,93.