Rangeland Watershed Water Budget and Grazing Cattle Waste Nutrient Cycling

摘要

This research project was designed to determine baseline data concerning the source, movement, concentration and factors affecting nonpoint pollutants in runoff from a representative 60-hectare, tallgrass prairie watershed grazed by cattle in North Central Oklahoma. Measurements were made to determine precipitation and runoff amounts and concentrations of sediment, nitrogen, phosphorus, potassium, BOD, COD and TOC. Concentrations of N, P, K, Ca and structural carbohydrates were determined in live and standing dead vegetation and dung collected periodically from different locations on the watershed.