Sweet Corn Stalk Treated with Saccharomyces Cerevisiae Alone or in Combination with Lactobacillus Plantarum: Nutritional Composition, Fermentation Traits and Aerobic Stability
2019
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 Saccharomyces cerevisiae inoculant alone or jointly with Lactobacillus plantarum 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) S. cerevisiae at 1 ×: 108 cfu/g of fresh forage (S): and (3) S. cerevisiae at 1 ×: 108 cfu/g plus L. plantarum at 1 ×: 105 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 (p <: 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 (p <: 0.05) than those in the U silage, but they were lower (p <: 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 (p <: 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 (p <: 0.05), and the aerobic stability of the SL silage was unaffected (p >: 0.05). Overall, the quality of sweet corn stalk silage was not improved by inoculation with 108 cfu/g of S. cerevisiae alone or in combination with 1 ×: 105 cfu/g of L. plantarum.
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