Bioavailable phosphorus transport from a hillslope cropland of purple soil under natural and simulated rainfall

被引：29

作者：

Gao, Yang ^{[1
,2
]}

Zhu, Bo ^{[1
]}

Wang, Tao ^{[1
]}

Tang, Jia-liang ^{[1
]}

Zhou, Pei ^{[2
]}

Miao, Chi-yuan ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China

[2] Shanghai Jiao Tong Univ, Dept Environm Sci & Engn, Sch Agr & Biol, Shanghai 200240, Peoples R China

[3] Peking Univ, Dept Environm Engn, Beijing 100871, Peoples R China

来源：

ENVIRONMENTAL MONITORING AND ASSESSMENT | 2010年 / 171卷 / 1-4期

关键词：

Overland flow; Subsurface flow; Phosphorus transport; Natural rainfall; SURFACE RUNOFF; OVERLAND-FLOW; MANURE PHOSPHORUS; SICHUAN BASIN; EROSION; SUPERPHOSPHATE; SYSTEMS; LOSSES; EXPORT; CHINA;

D O I：

10.1007/s10661-009-1298-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To further understand the mechanism of bioavailable total P (BAP) and bioavailable dissolved P (BDP) transport by overland and subsurface flow, we exposed a runoff plot 4.5 m long x 1.5 m wide x 0.6 m deep to simulated and natural rainfall in order to study the effects of rainfall type, rainfall intensity, and vegetation cover on BAP and BDP transport. The results showed that vegetation cover could alleviate the discharge of overland flow and sediment transport and enhance subsurface flow. BAP transport significantly increased with elevated rainfall intensity. Vegetation cover reduced the BAP transport by overland flow and increased it by subsurface flow. BDP transport showed no significant relationship with vegetation cover and rainfall type. The bioavailable particulate P (BPP) transport by overland flow contributed to no less than 90% by weight of total BAP, and the BPP transport by subsurface flow contributed to no less than 60% by weight of total BAP. Short-time heavy rainfall caused more BAP transport and accelerated non-point source pollution.

引用

页码：539 / 550

页数：12

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