Effects of lactic acid bacteria preparation and bran on corn stover silage quality

doi:10.11686/cyxb2017229

Abstract

Abstract: To elucidate the effect of lactic acid bacteria and bran on the quality of corn stover silage at two treatment times (harvest and harvest+3 days), the effect of three inoculants (Sila-Max, Sila-Mix and bran) on the nutritive value and fermentation parameters of ensiled corn stover was studied using 20 L self-made mini-silos for 45 d under ambient environmental conditions. The results demonstrated that all treatments made good quality corn silage in the mini-silos. In the uninoculated group, delaying ensiling time by 3 d significantly (P<0.05) increased the acetic acid, ammonia nitrogen, crude protein, acid detergent fiber, lignin, calcium and dry matter loss by 22.05%, 50.00%, 10.34%, 5.19%, 10.92%, 20.51% and 48.37%, respectively, while decreasing dry matter content by 7.37%. For the harvest time treatment, Sila-Max+bran significantly (P<0.05) increased lactic acid, ether extract and crude protein by 22.98%, 12.46% and 5.57%, respectively, while decreasing dry matter loss by 39.27%; Sila-Max significantly (P<0.05) increased dry matter by 6.41%, decreased dry matter loss by 45.80%, and bran decreased crude protein by 9.17%. For the 3 d delayed ensiling, Sila-Max significantly (P<0.05) increased the acetic acid and lignin by 10.94% and 9.14%, respectively, decreased ether extract by 11.29%, while bran increased acetic acid by 10.94% and decreased ether extract by 11.29%. Sila-Max+bran significantly (P<0.05) increased acetic acid, lignin and dry matter by 9.67%, 12.13% and 6.23%, respectively, while decreasing ether extract and dry matter loss by 15.81% and 26.73%. All treatments were similar (P>0.05) for 48 h in vitro dry matter digestibility. In conclusion, delayed ensiling decreased dry matter and fermentation quality, enhance aerobic fermentation, increase dry matter loss. Sila-Max+bran enhanced corn silage fermentation quality and decrease nutrient loss when ensiled immediately but had no effect on fermentation quality when ensiling was delayed by 3 d.

Key words: silage, inoculants, corn stover, ensiling time, silage quality

WANG Jian-fu, LEI Zhao-min, CHENG Shu-ru, JIAO Ting, LI Jie, WU Jian-ping. Effects of lactic acid bacteria preparation and bran on corn stover silage quality[J]. Acta Prataculturae Sinica, 2018, 27(4): 162-169.

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