Sediment enrichment ratios after mechanical site preparation for Pinus radiata plantation in the Basque Country
作者： J.R Olarieta , G Besga , R Rodrı́guez , A Usón , M Pinto
DOI: 10.1016/S0016-7061(99)00063-4
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摘要: Abstract The enrichment of organic matter, total nitrogen, phosphorus, and exchangeable calcium, magnesium, sodium, potassium in runoff sediment was studied by means traps two steep slopes (25–34°) for a period 18 months after site preparation (scalping down-slope ripping) Pinus radiata plantation. Total nitrogen concentration significantly higher the source soils than their sediments. Phosphorus, concentrations were sediments, although not significantly. No relation found between ratios rainfall intensity. Steep hydraulic soil-surface conditions favourable to production are suggested govern high erosive power runoff, which results nonselective displacement soil particles. In spite this lack surface samples taken showed lower potassium, aluminium, aluminium saturation exchange complex before preparation. Removal nutrient-rich mineral horizons scalping, rather water erosion taking place afterwards, is process responsible most decrease nutrient occurring as result
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