1. Effects of composite organic acids on silage quality, aerobic stability, and microbial population of hybrid Pennisetum alopecuroides (L.) Spreng.
- Author
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WANG Ping, WEI Dai-lian, and LIU Yuan
- Subjects
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ORGANIC acids , *MICROORGANISM populations , *FEED analysis , *BUTYRIC acid , *PENNISETUM , *LACTIC acid bacteria , *SILAGE - Abstract
The experiment aimed to explore the effects of different ratios of composite organic acids on the silage quality, aerobic stability, and microbial population of hybrid Pennisetum alopecuroides (L.) Spreng. The experiment was divided into four groups, with five replicates in each group. The addition amounts of compound organic acids in control group and experimental groups were 0, 0.5%, 1.0% and 2.0%, respectively. The silage was stored for 60 days. The results showed that compared with the control group, the dry matter, crude protein, soluble carbohydrate content, and relative feeding value of the 1.0% composite organic acid group were significantly increased (P<0.05), the content of neutral detergent fiber was significantly reduced (P<0.05), the acid detergent fiber content of the 1.0% and 2.0% composite organic acid groups was significantly reduced (P<0.05), and the ash content of the 0.5% and 1.0% composite organic acid groups was significantly reduced (P<0.05). The pH value and the ratio of ammonia nitrogen to total nitrogen of the 1.0% and 2.0% composite organic acid groups were significantly reduced (P<0.05), the lactic acid content of the 1.0% composite organic acid group was significantly increased (P<0.05), the acetic acid content of the 0.5% composite organic acid group was significantly increased (P<0.05), the acetic acid content of the 1.0% and 2.0% composite organic acid groups was significantly reduced (P<0.05), and the propionic acid content of the 1.0% composite organic acid group was significantly increased (P<0.05), and the butyric acid content of the 0.5%, 1.0%, and 2.0% composite organic acid groups was significantly reduced (P<0.05). Compared with the control group, the aerobic stability and lactic acid bacteria count of the 0.5% and 1.0% composite organic acid groups were significantly increased (P<0.05), the yeast count of the 1.0% and 2.0% composite organic acid groups was significantly reduced (P<0.05), and the aerobic bacteria count of the 0.5%, 1.0%, and 2.0% composite organic acid groups was significantly reduced (P<0.05). The study shows that adding composite organic acids during the silage process can improve the nutritional value and fermentation quality of hybrid Pennisetum alopecuroides (L.) Spreng, with the 1.0% composite organic acid group showing the best results. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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