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Zur Stickstoffdynamik unter Exkrementflecken bei Weidegang
Authors:Günter Spatz  Jochen Neuendorff  Arnold Pape  Claudia Schrder
Institution:Günter Spatz,Jochen Neuendorff,Arnold Pape,Claudia Schröder
Abstract:Nitrogen Dynamics Under Excrement Patches in Pastures Soil mineral nitrogen contents in relation to time were measured under excrement patches on three pastures in Lower Saxony. The highest values were found under patches of urine on a pasture grazed by suckling cows. The herbage dry matter of that pasture showed a crude protein content of 19 %. The contents of mineral nitrogen under urine patches were less on a comparable pasture utilized by milking cows. The concentrations were still less on a cow grazed pasture, which remained unfertilized over a period of ten years. The content of NH4-N under urine affected areas increased distinctly in the whole soil profile, within one day of deposition. High NO3-N concentrations were found even in deeper soil layers after one week. The nitrogen concentrations under patches of urine approximated the values under not urine affected parts of the pasture within three months. The increments of mineral nitrogen under patches of faeces were insignificant.
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