Nenad Djordjevic

The influence of zeolite on the quality of fresh beet pulp silages

The influence of different doses of natural zeolite addition on chemical composition and quality of beet pulp silages was investigated. Beet pulp was ensiled in the sugar factory in Požarevac immediately after they were obtained, or after 9 or 17 days. The two-factorial trial was conducted where the first factor (A) was the time of ensiling expressed in days after the pulp was obtained (a1= O; a2 = 9; a3 = 17), while the second factor (B) was the amount of zeolite added (b1= 0; b2 = 0.05; b3 = 0.25 and b4 = 1.25% in dry matter or 0; 50; 250 and 1250 g zeolite per 100 kg of raw beet pulp). Sample collection for standard chemical composition and quality estimation was taken 60 days after the beginning of the ensiling. The results from the literature show that adding technologically processed natural zeolite (Min-a-Zel, produced by ITNMS, Belgrade) while ensiling beet pulp has significant influence on the increase of lactic acid production, decrease in bonded acetic acid content and lower pH value. The influence of explained doses of zeolite on standard chemical composition is smaller and mostly of relative value. The only real changes in chemical composition are the increase in dry matter and mineral content. In the ensiling of the beet pulp stored in the longer period of time, the more intensive fermentation processes were achieved and the production of organic acids was larger which has better conserving effects on silage.

Influence of min-a-zel plus and maize meal addition on the quality of lucerne silage

The influence of mineral adsorbent Min-A-Zel Plus (5 g/kg) and maize meal (25 and 50 g/kg) used alone or combined, on chemical composition, biochemical changes and quality of lucerne silage was investigated. Based on the obtained data, it can be concluded that addition of Min-A-Zel Plus reduces aminogenesis, while the use of maize meal alone or with zeolite favorable conditions are achieved for lactic acid fermentation, so that the quality of obtained silages is better by one quality class. To achieve better effects of silage quality, the use of combination of mineral adsorbent with carbohydrate additives is recommended.

Influence of addition of Zenural 70, urea and Min-A-Zel Plus on chemical composition and quality of whole maize plant silage

The influence of addition of Zenural 70, urea and Min-A-Zel Plus on chemical composition and quality of whole maize plant silage with different degree of compression was investigated in the paper. Experiment was two-factorial (2x3) with three replications, where factor A was a degree of compression (A, = 680 g/dm³; A2 = 550 g/dm³), while factor B was an additive type (Decontrol; B2=5 g/kg urea+2 g/kg Min-A-Zel Plus; B3=5 g/kg Zenural 70). Chemical analyses showed that with the addition of Zenural 70 and urea there was significant increase of pH value, total protein, mineral ammonia and soluble nitrogen content. The type of additive had no significant effect on production of lactic, acetic and butyric acid, while in silages with higher degree of compression (680 g/dm3) there was significantly more butyric acid. All silages were graded first class according to DLG and Flieg method, with the exception of lower compressed silage with added urea and Min-A-Zel Plus, which according to Flieg was second class. According to Zelter method, silages with added Zenural 70 were II and III class, while treatments with added urea and Min-A-Zel Plus were IV and V class.

The influence of inoculation on chemical composition and quality of silages made from soybean and entire maize plant

The ensiling of soybean and entire maize plant was done in experimental siloses with or without inoculant Sill-All (produced by Alltech inc). The experiment was organized as two-factorial (2 ´ 3, n = 3), where factor A was inoculant (a1 = without inoculant, a2 = with inoculant), and factor B was soybean and entire maize plant ratio (b1 = 1: 0; b2 = 2: 1 and b3 = 1 2). Inoculated silages at average had more lactic acid, lower pH values and higher content of ammonia nitrogen, nonsoluble nitrogen and NFE (P < 0.05). The included of entire maize plant in mixture produces high effect on reduction proteolysis. With the increase of entire maize plant share the decrease of pH values and amount of butyric acid, ammonia nitrogen, soluble nitrogen, crude protein and crude fiber was observed. According to the DLG method for silage quality evaluation, silages without inoculant had second class, and silages with inoculant had first class. Improvement in silage quality with the included entire maize plant from fourth to first class, was achieved.