Assessment of factors affecting the uniformity of total mixed rations in feeder mixer machine | ||
| تحقیقات سامانهها و مکانیزاسیون کشاورزی | ||
| Articles in Press, Accepted Manuscript, Available Online from 13 March 2026 | ||
| Document Type: Original Article | ||
| DOI: 10.22092/amsr.2026.371789.1531 | ||
| Author | ||
| Mohammad-Ali Behaeen* | ||
| Agricultural Rerearch, Education and Extension Organization | ||
| Abstract | ||
| In order to investigate the uniformity of the total mixed ration in a feeder mixer machine, the effect of three levels of spiral rotation of 50(R50), 60(R60) and 70(R70) rpm, and the mixing time at three levels of 15(T15), 18(T18) and 21(T21) minutes were compared in a factorial experiment in a completely randomized design with three replications. The parameters studied included measuring the crushing of mixed ration, measuring the uniformity of mixed materials, and examining the flowability of mixed materials (Froude number). The data obtained were analyzed with SAS software and means were compared with Duncan's multiple range test. The results showed that the highest amount of material crushing (the lowest in the geometric mean of material) was obtained at a spiral rotation of 70 rpm and a time of 21 minutes and the lowest amount of forage material crushing was obtained at a spiral rotation of 50 rpm and a time of 15 minutes with a significant difference between them (P<0.05). The highest uniformity was also achieved in the R70T21 treatment. Considering the widespread use of feeder mixer machine in dairy farms and the time savings in preparing total mixed ration, a treatment should be provided that has a small spiral axis and the time spent using the machine in preparing the total mixed ration is appropriate. Based on the studies conducted, the R50T18 treatment with a standard deviation of 1.39 cm in piece length (Sgm) and a uniformity of mixed materials of 1.63 g (Sd), is recommended. | ||
| Keywords | ||
| Pennsylvania sieve; ration; crushing; Froude number; homogeneity | ||
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