Physical form of forage and total mixed ration for lactating dairy cows | Fizička forma kabastih hraniva i kompletnog obroka za krave u laktaciji
2009
Stojanović, B., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Grubić, G., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Đorđević, N., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Božičković, A., Poljoprivredni fakultet, Beograd - Zemun (Serbia)
The researching results of forage - corn silage and alfalfa haylage physical form, at 4 dairy farms of PKB - Corporation in Belgrade, Serbia, are shown in this paper. The particle size of total mixed ration (TMR) for dairy cows in the first stage of lactation (10-60 days) was also determined in this study. For forage and total mixed ration particle length determination the system of sieves-Penn State Particle Separator (PSPS) was used. It was concluded that at only one of four dairy farms the relative portion of corn silage and TMR fractions was within the recommended value. All samples of alfalfa haylage were different from the optimal ratio range for some physical fractions. The high values were found for correlation coefficient between the particle size of corn silage and TMR (r=0.97), and alfalfa haylage and TMR (r=0.94). It can be concluded that during preparation process of forages and improvement of physical form of corn silage and alfalfa haylage is necessary, and also improvement of total mixed ration physical form, using PSPS sieve system.
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