Assessing nitrogen and phosphorus in excreta from grower-finisher pigs fed prevalent rations in Vietnam.

摘要: Livestock production in Vietnam is, as most Asian countries, increasing rapidly and changing into specialized highly intensified operations. The volume of animal excreta generated exceeds the capacity operation land base cannot be utilized efficiently. As a consequence, there is loss plant nutrients from livestock farms that causes environmental pollution. This study carried out feed excretion experiment measuring fecal characteristic, daily production, nitrogen phosphorous grower-finisher pigs fed prevalent rations Vietnam. Furthermore, equations for assessing were tested, which can used farm models optimal recycling manure while focusing on reducing results indicated nutrient affected by different tested. showed five selected predicting Danish conditions also with precision Vietnamese pig farming systems. have been proven valid can, therefore, much needed tool farms. about 12% excreted was emitted during housing. Waste water contains more than half excreted, mainly ammonium form has high potential gaseous emission.