Sweet Corn Stalk Treated with <i>Saccharomyces Cerevisiae</i> Alone or in Combination with <i>Lactobacillus Plantarum</i>: Nutritional Composition, Fermentation Traits and Aerobic Stability
Xiaoling Zhou | Zhu Ouyang | Xiaoli Zhang | Yuqing Wei | Shaoxun Tang | Zhiyuan Ma | Zhiliang Tan | Nong Zhu | Tsegay Teklebrhan | Xuefeng Han
This study examined the effects of a high-dose <i>Saccharomyces cerevisiae</i> inoculant alone or jointly with <i>Lactobacillus plantarum</i> on nutrient preservation, fermentation quality, and aerobic stability of sweet corn stalk silage. Fresh stalks (231 g dry matter (DM)/kg) were chopped and subjected to the following treatments: (1) deionized water (Uninoculated; U); (2) <i>S. cerevisiae</i> at 1 × 10<sup>8</sup> cfu/g of fresh forage (S); and (3) <i>S. cerevisiae</i> at 1 × 10<sup>8</sup> cfu/g plus <i>L. plantarum</i> at 1 × 10<sup>5</sup> cfu/g (SL). Treated stalks were ensiled in 5-litre laboratory silos for 30, 60, and 90 day. The S and SL silages had a greater (<i>p</i> < 0.001) pH and greater crude protein, ammonia nitrogen/total nitrogen, neutral detergent fibre, acid detergent fibre, and ethanol contents at all three ensiling periods than the U silage. Acetate, propionate and volatile fatty acids in the S and SL silages after 30 and 90 day of ensiling were greater (<i>p</i> < 0.05) than those in the U silage, but they were lower (<i>p</i> < 0.05) in the S and SL silages than in the U silage after 60 day. The lactate and V-score of the S and SL silages were lower (<i>p</i> < 0.001) than those of the U silage at all three ensiling periods. Compared with the U group, the aerobic stability of the S silage after 90 day of ensiling decreased (<i>p</i> < 0.05), and the aerobic stability of the SL silage was unaffected (<i>p</i> > 0.05). Overall, the quality of sweet corn stalk silage was not improved by inoculation with 10<sup>8</sup> cfu/g of <i>S. cerevisiae</i> alone or in combination with 1 × 10<sup>5</sup> cfu/g of <i>L. plantarum</i>.
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