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首页> 中文期刊> 《农业科学与技术：A》 >Handling Characteristic Evaluation of Free, Standard and Lipid Microencapsulated Vitamin and Mineral Premixes

Handling Characteristic Evaluation of Free, Standard and Lipid Microencapsulated Vitamin and Mineral Premixes

         
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Feed ingredients can change physically or chemically when exposed to moisture,heat or pressure.These changes impact how well they flow through a bin and disperse throughout the feed.Microencapsulation is a relatively new technique used to reduce reactivity and improve storage and handling characteristics(HC)of nutrients.The authors hypothesize that lipid matrix microencapsulation of free vitamin and mineral(VM)premixes significantly improve their HC making them more desirable products for feed mills.Triplicate samples of free,standard and lipid microencapsulated VM premixes were evaluated for the following HC:particle size(dgw),particle size variability(Sgw),flowability(measured by angle of repose(AOR)and minimum orifice diameter(MOD)),lumping,compressibility,bulk and tapped density,solubility and hygroscopic percent change in weight(day 0-1,0-3,0-5,5-9,0-9).Results were analyzed in a 3×2 factorial(JMP Pro 14)of form(free,standard,microencapsulated)by type(vitamin,mineral).Microencapsulated VM had the highest dgw(611.0mm and 722.7mm,respectively,p=0.002);free and microencapsulated vitamins had the smallest Sgw(1.67 and 1.49,respectively,p<0.001).Microencapsulated premixes had significantly lower AOR(p<0.001)and MOD values(p<0.001)than other premixes,indicating improved flowability.From days 0-3 and 0-5,microencapsulated premixes absorbed approximately half as much moisture(1.62%and 2.24%,respectively)than the free(3.48%and 5.04%,respectively)or standard(3.74%and 5.26%,respectively)premixes(p=0.001).The benefits gained from lipid matrix microencapsulation technology not only improve the HC of animal feed additives,but also improve the stability of VM premixes.

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