Optical luminescent properties of stalked and concentrated feeds

Federal Scientific Agroengineering Center VIM, Laboratory of Innovative Technologies and Technical Means of Feeding in Animal Husbandry, 5, 1st Institute passage, Moscow, 109428, Russia

^* Corresponding author: bmw20100@mail.ru

Abstract

There is a growing consumer demand among livestock professionals for compact devices that allow to determine the nutritional value of field-grown forage, bypassing a long chain of laboratory tests. This allows for the most efficient operation of the feeding management process. Among commercial instruments, the most common diagnostic method is the use of near infrared spectroscopy, however, our study shows that spectroscopy in the visible range, in some cases, may be considered as a more representative method. The use of excitation for photoluminescence by radiation with the wavelength of 424 nm (luminescence measurement range 450-600nm) is the most promising method within the analysis of the feeding mixtures composition. It is expedient to take the excitation wavelength of 485 nm (luminescence measurement range 510-670nm) as the reference one. The difference between the most luminescent fraction of silage and mixed fodder is λ_e=424 nm being 1.96 times.