IMHE OpenIR  > 山地表生过程与生态调控重点实验室
紫色土区小流域不同土地利用类型非点源氮迁移特征
Alternative TitleTransport Characteristics of Nitrogen on Different Land-uses Patterns in the Hilly Area of Purple Soil
杨小林; 陈志超; 朱波
Corresponding Author朱波
2013
Source Publication水土保持学报
ISSN1009-2242
Volume27Issue:27Pages:71-75
Abstract  通过对紫色土区小流域旱地、居民点氮迁移过程的野外监测,研究紫色土区旱地、居民点氮流失特征。结果表明,地表径流是居民点氮迁移的主要途径,而旱地氮素主要通过壤中流迁移。次降雨事件中居民点氮迁移浓度、负荷变化显著,总氮(TN)、颗粒态氮(PN)、铵氮(AN)迁移呈现显著的"初始冲刷效应",初期25.0%的径流量携带了37.0%的TN负荷、60.0%的PN负荷和36.0%的AN负荷,而旱地径流中氮浓度、负荷变化较小。居民点氮流失与降雨量密切相关,旱地氮流失则集中在施肥后初期降水事件。旱地、居民点是紫色土区小流域氮流失的主要"源",其中旱地、居民点径流中TN年内浓度分别为16.43,14.68mg/L,TN年内流失负荷分别为41.18,222.05kg/hm2。  更多 还原
Other Abstract 通过对紫色土区小流域旱地、居民点氮迁移过程的野外监测,研究紫色土区旱地、居民点氮流失特征。结果表明,地表径流是居民点氮迁移的主要途径,而旱地氮素主要通过壤中流迁移。次降雨事件中居民点氮迁移浓度、负荷变化显著,总氮(TN)、颗粒态氮(PN)、铵氮(AN)迁移呈现显著的"初始冲刷效应",初期25.0%的径流量携带了37.0%的TN负荷、60.0%的PN负荷和36.0%的AN负荷,而旱地径流中氮浓度、负荷变化较小。居民点氮流失与降雨量密切相关,旱地氮流失则集中在施肥后初期降水事件。旱地、居民点是紫色土区小流域氮流失的主要"源",其中旱地、居民点径流中TN年内浓度分别为16.43,14.68mg/L,TN年内流失负荷分别为41.18,222.05kg/hm2。 

; Long-term plot experiments on runoff at field scale were from the upland and residential area in the hilly area of purple soil. affected the nitrogen transport deeply from upland and residential the main route of nitrate loss from residential area. In contrast, performed to monitor nitrogen transport Results showed that the runoff processes area. Nitrogen loss via surface flow was nitrogen mainly was transported by the interflow in upland. At single rainfall event duration, great temporal variations in nitrogen concentration and loading distribution were observed in residential area which exhibited a strong "first flush" of total nitrogen (TN), particulate nitrogen(PN), and ammonia nitrogen(AN), the mass loadings proportions of 37.0% TN, 60.0% PN and 36.0% AN, respectively, were delivered within the first 25.0% of the runoff volume. In contrast, small variations in nitrogen concentration and loading distribution were observed for upland. The liner regression analysis showed that the nitrogen loss in residential area was clearly correlated with the precipitation, and nitrogen loss from upland was concentrated at the initial rainfall events after the input of N fertilizer. The results showed that the residential area and upland were the most important "hotspot" of diffuse pollution in the catchment, the TN concentration in 2011 were 16. 43 mg/L and 14. 68 mg/L for upland and residential area, respectively, and the loss rate of TN from upland and residential area were 41.18 kg/hm2 and 222.05 kg/hm2 , respectively. The treatments need to be focused more closely on the residential area and upland at the initial period of runoff and the initial rainfall events after the input of N fertilizer, respectively.
Keyword土地利用 紫色土
Indexed ByCSCD
Language中文
CSCD IDCSCD:4841222
Funding Organization国家重点基础研究发展计划项目(2012CB417101)
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6675
Collection山地表生过程与生态调控重点实验室
Recommended Citation
GB/T 7714
杨小林,陈志超,朱波. 紫色土区小流域不同土地利用类型非点源氮迁移特征[J]. 水土保持学报,2013,27(27):71-75.
APA 杨小林,陈志超,&朱波.(2013).紫色土区小流域不同土地利用类型非点源氮迁移特征.水土保持学报,27(27),71-75.
MLA 杨小林,et al."紫色土区小流域不同土地利用类型非点源氮迁移特征".水土保持学报 27.27(2013):71-75.
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