EN
Basing on data from literature as well as own research, various methods and techniques of adding preservatives to ensilaged green fodders were analyzed. It was found, that addition of preservatives when harvesting with collecting chaff cutters, should be used in national agriculture to improve the quality of produced ensilages. This is because this way homogeneous mixing of preservatives with green fodder can be achieved. One should consider the possibility of starting the production of metering devices, which would be installed on collecting chaff cutters. The tests made so far with the models of metering devices should allow for production of a good model of Polish metering device.