干旱区生态环境知识资源中心(Arid): 自然降雨条件下岩溶区土壤钾、氮流失及其对泉水水化学的影响以广西马山弄拉为例

Arid

	自然降雨条件下岩溶区土壤钾、氮流失及其对泉水水化学的影响以广西马山弄拉为例
其他题名	Soil Loss of Phosphorus and Nitrogen Under Different Precipitation at Karst Area in Southwest China and its Influence on Spring Hydrochemistry A Case Study at Nongla, Mashan, China
	李强 1; 孙海龙 1; 贺秋芳 1; 贾丽萍 2
ISSN	1672-2043
出版年	2006
卷号	25 期号:2 页码:467-470
中文摘要	为研究自然降雨条件下我国西南脆弱岩溶环境区在未受人类活动干扰时土壤元素流失情况，国土资源部岩溶动力学重点实验室于2003年8月5日至7日在广西弄拉岩溶动力系统观测站以表层岩溶泉为介质．通过利用U-20多离子参数仪和CDTP300雨量自动记录仪监测不同降雨强度下泉水中的钾、氮动态变化，来考察土壤钾、氮流失情况及其对泉水水化学的影响。结果表明：在降雨过程中，泉水中的K^＋和NO3^-含量均出现急剧升高的现象，并且泉水内的时和NO3^-含量与降雨强度密切相关。从而说明降雨是导致岩溶区土壤元素流失的主要原因。而泉水内NO^3-含量呈现出持续升高的现象，可能是由于岩溶区土壤中氮主要以硝态氮（NO3^- -N）形式存在，在降雨停止后的一段时间内仍能通过淋滤作用进入水体。
英文摘要	For understanding soil nutrient loss characteristics under different precipitation at karst area in Southwest China, the Nongla karst dynamic system monitoring site, situated at E 108°19′, N 23°29′, was studied in this paper. Because of the double-layered surface and subsurface structure at karst area, rainfall rapidly penetrates into ground and forms spring or underground water. Therefore, by monitoring the hydrochemieal variation of local spring, the soil nutrient loss characteristics can be known under different precipitation. In accordance with the reason, high-resolution measurements of rainfall, K^＋ and NO3^- variation of Landiantang spring were recorded by using data logger with time interval of fifteen minutes from Aug. 5 to Aug. 7 in 2003 at Nongla, Mashan county in Guangxi Province, China, which is scarcely disturbed by man. From the result, it can be seen that the contents of K^＋ and NO3^- in Landiantang spring rapidly increased under different precipitation and the content of K^＋ and NO3^- in the spring had the positive correlation with the rainfall. According to the result, it can be known that the precipitation is the main factor that leads to the soil nutrient loss at karat area. Moreover, the content of NO3^- in the spring had the different rule from K^＋ and continued increase for a long time. The reason is that because of nitrogen mainly existing as NO3^--N in the soil at karst area, the NO3^- still can be lost for a long time undergoing eluviation, even when it stops raining. Therefore, it can be concluded from the result that precipitation not only will bring the problem of nutrient loss at karst area, which will accelerate the process of soil erosion and rock desertification, but also can produce some environmental problems, if presents cultivate at the replenishment region of spring or underground water.
中文关键词	自然降雨 ; 钾 ; 氮流失 ; 自动化监测 ; 广西弄拉
英文关键词	natural precipitation loss of phosphorus and nitrogen hydrochemical data logging Nongla,Guangxi
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2329779
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219974
作者单位	1.中国地质科学院岩溶地质研究所, 国土资源部岩溶动力学重点实验室, 桂林, 广西 541004, 中国; 2.华中科技大学生命科学与技术学院, 武汉, 湖北 430074, 中国
推荐引用方式 GB/T 7714	李强,孙海龙,贺秋芳,等. 自然降雨条件下岩溶区土壤钾、氮流失及其对泉水水化学的影响以广西马山弄拉为例[J],2006,25(2):467-470.
APA	李强,孙海龙,贺秋芳,&贾丽萍.(2006).自然降雨条件下岩溶区土壤钾、氮流失及其对泉水水化学的影响以广西马山弄拉为例.,25(2),467-470.
MLA	李强,et al."自然降雨条件下岩溶区土壤钾、氮流失及其对泉水水化学的影响以广西马山弄拉为例".25.2(2006):467-470.