The effect of procedures at silage making on the density and spoilage of maize silage | Vpliv postopkov pri siliranju na gostoto in kvarjenje koruzne silaze
2005
Mrzlikar, A., Ljubljana Univ. (Slovenia). Biotechnical Fac., Zootechnical Dept | Verbic, J., Agricultural Inst. of Slovenia, Ljubljana (Slovenia)
Procedures at silage making were surveyed 10 45 bunker and 10 tower silos. Silage dry matter concentrations and density were also measured. The volume of bunker silos ranged from 16 to 500 and the volume of tower silos from 50 to 100 . Dry matter densities in bunker and tower silos ranged from 118 to 283 and from 112 to 231 dry mater / , respectively. On the average, densities in bunker silos were by about 10 % higher than those in tower silos (209 vs. 176 kg dry matter/ ). Dry matter densities were posotovely correlated to silage dry matter concentration. The most important factor which affected the dry matter densities was the weight of packing tractor. Generally, densities above 240 kg dry matter/ were achieved only with heavy packing tractors (5000 kg). Farmers with high filling speed use heavier packing tractors and therefore the correlation between filling speed and silage density was positive. It seems that low packing performance of light tractors can not be compensated by a prolonged packing time. Also the correlation between cutting length and silage was relatively poor. Colonies of moulds in the silage appear irrespectively of silage dry matter concentration, silage density and daily feedout. It seems, that there are other important factors like concentration of sugars, acetic acid, ammonia etc., which mask the relation between silage density and aerobic stability.
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