Effects Of Additives On The Quality Of Corn Stover Silage

Aim at the current situation of research on silage additives in China, the effects of different additives containing hydrochloric acid, caproic acid, lactobacillus, cellulase on the nutrient preservation and silage quality of corn stover silage had been studied in two experiments. Firstly, the dissertation chose the species of additives and decided the concentrations of addition. Then experiments had been carried out by using corn stover ensiled with those additives under ideal ensiling condition. After each storage and fermentation period, silage was removed from silo tin and analyzed for DM, pH, DM digestibility, NDF digestibility, organic acid composition and content, DM Recovery, silage composition, ammonia-N-to-total-N ratios (VBN/TN) of silage. Those results had been used to evaluate the effects of those additives on corn stover silage.Results showed that the addition of hydrochloric acid had decreased obviously the lactic-to-total acid ratios, DM Recovery, and improved concentrations of organic cell wall (OCW) (P<0.05). It means this treatment had debated the silage quality of corn stover silage. Caproic acid treatment had little effects on pH, DM digestibility, NDF digestibility, organic acid composition and content, DM Recovery, concentrations of NDF, ADF, ADL, OCW, organic b Fraction (OB) (P>0.05), but it repressed the growth of fungi and improved the odor, color, texture of the silage. Treatment of corn stover with caproic acid and hydrochloric acid could obviously decrease pH and concentrations of OB, ADF, ADL. Meanwhile, it could improve greatly the odor, color, texture of silage while DM digestibility, NDF digestibility, organic acid composition and content, DM Recovery, concentrations of NDF, OCW were not affected by this treatment (P>0.05). So it means the addition of caproic acid and hydrochloric acid had improved the silage quality.Although having minimal effects on DM digestibility, NDF digestibility, DM Recovery and concentrations of lactic acid, NDF, and crude protein, treatment of corn stover silages with cellulase had reduced VBN/TN 28%, ADF20% and butyric acid-to-total acid 100% as compared with control silage. This silage quality turned out to be better as compared with control silage. Lactobacillus treatment had increased concentrations of NDF, VBN/TN and decreased lactic acid content while this silage had good color, odor and texture. Treatment of corn stover silages with cellulase and lactobacillus had improved DM digestibility 8% and decreased VBN/TN 33%, butyric acid-to-total acid ratios 81%, NDF content 10%, ADF content 7%. That had approved their quality be improved obviously.