Fecal Storage Mode and Soil Bearing Capacity of Large-scale Pig Farm

Contents of dry matter，total nitrogen，total phosphorus and total potassium in upper and lower layers were determined by using water flushing and blister manure as test materials.Variation of content with time was also discussed.Soil carrying capacity of manure water was analyzed，and formula for calculating amount of safe application of manure water and amount of land area needed for nutrient absorption was obtained.Results showed that contents of total nitrogen，total phosphorus and total potassium decreased by 58.38%，84.19% and 47.69% respectively when storage time of feces was 180 days.In the case of low dry matter content，formula can be used to estimate amount of safe application of certain elements in manure and land area needed to absorb nutrients.