EN
The litter system of raising cattle and pigs is dominating in Polish agriculture. Produced liquid manure creates a significant hazard for the environment due to lack of appropriate tanks for its storage along with the shortcomings in organisation and insufficient facilities for transport on the fields. Such insufficiency of storage tanks and transport facilities also hampers the proper utilisation of liquid manure. Currently the overloading of environment with animal wastes does not occur as the average stock density amounts 0,5 to 1,0 livestock unit/ha. The humus-forming efficiency of slurry is only slightly less than the manure efficiency, and the fertilization efficiency equals that of mineral fertilization. The introduction of new systems of slurry treatment before its agricultural utilization is difficult due to economical reasons. The application of methane fermentation to slurry is not very effective in our conditions. An important liquid manure component of crop-yielding and ecological significance is the nitrogen, hence the doses of liquid manure and slurry under particular crops should be set on the basis of nitrogen balance.