Bioavailable phosphorus transport from a hillslope cropland of purple soil under natural and simulated rainfall
- 30 December 2009
- journal article
- Published by Springer Science and Business Media LLC in Environmental Monitoring and Assessment
- Vol. 171 (1-4), 539-550
- https://doi.org/10.1007/s10661-009-1298-6
Abstract
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 × 1.5 m wide × 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.Keywords
This publication has 29 references indexed in Scilit:
- Effects of vegetation cover on phosphorus loss from a hillslope cropland of purple soil under simulated rainfall: a case study in ChinaNutrient Cycling in Agroecosystems, 2009
- Phosphorus loss from different farming systems estimated from soil surface phosphorus balanceAgriculture, Ecosystems & Environment, 2005
- The relationship between potentially erosive storm energy and daily rainfall quantity in England and WalesScience of The Total Environment, 2005
- The phosphorus transfer continuum: Linking source to impact with an interdisciplinary and multi-scaled approachScience of The Total Environment, 2005
- Deforestation of water‐repellent soils in Galicia (NW Spain): effects on surface runoff and erosion under simulated rainfallEarth Surface Processes and Landforms, 2003
- Characterising phosphorus loss in surface and subsurface hydrological pathwaysScience of The Total Environment, 2000
- The role of root border cells in plant defenseTrends in Plant Science, 2000
- Evaluating measures to control the impact of agricultural phosphorus on water qualityWater Science & Technology, 1999
- Hydrological Factors for Phosphorus Transfer from Agricultural SoilsAdvances in Agronomy, 1999
- Particulate and dissolved phosphorus forms in freshwater: composition and analysisHydrobiologia, 1988