Effect of inoculants and storage temperature on the microbial, chemical and mycotoxin composition of corn silage

• Published in: Animal bioscience Vol. 31; no. 12; pp. 1903 - 1912
• Main Authors: Wang, Musen, Xu, Shengyang, Wang, Tianzheng, Jia, Tingting, Xu, Zhenzhen, Wang, Xue, Yu, Zhu
• Format: Journal Article
• Language: English
• Published: Korea (South) Asian - Australasian Association of Animal Production Societies 01.12.2018; Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST); Asian-Australasian Association of Animal Production Societies; 아세아·태평양축산학회
• Subjects: Corn; Corn Silage; Fermentation; Lactobacillus plantarum; Microbiological research; Mycotoxin; Nutritive Value; Silage; 축산학; Lactobacillus plantarum; Pediococcus pentosaceus; Corn silage; Nutritive value; Mycotoxin
• ISSN: 1011-2367; 2765-0189; 1976-5517; 2765-0235
• DOI: 10.5713/ajas.17.0801

To evaluate the effect of lactic acid bacteria and storage temperature on the microbial, chemical and mycotoxin composition of corn silage. Corn was harvested at 32.8% dry matter, and chopped to 1-2 cm. The chopped material was subjected to three treatments: (1) control (distilled water); (2) 1 × 106 colony forming units g-1 of Lactobacillus plantarum; (3) 1 × 106 colony forming units g-1 of Pediococcus pentosaceus. Treatments in triplicate were ensiled for 55 d at 20, 28 and 37°C in 1-L polythene jars following packing to a density of approximately 800 kg m-3 of fresh matter, respectively. At silo opening, microbial populations, fermentation characteristics, nutritive value and mycotoxins of corn silage were determined. L. plantarum significantly increased yeast number, water soluble carbohydrates, nitrate, and deoxynivalenol content, and significantly decreased the ammonia N value in corn silage than control (p < 0.05). P. pentosaceus significantly increased lactic acid bacteria and yeast number and content of deoxynivalenol, nivalenol, T-2 toxin and zearalenone, while decreasing mold population and content of nitrate and 3-acetyl-deoxynivalneol in corn silage when stored at 20°C compared to control (p < 0.05). Storage temperature had a significant effect on deoxynivalenol, nivalenol, ochratoxin A and zearalenone level in corn silage (p < 0.05). Lactobacillus plantarum and Pediococcus pentosaceus did not degrade the contents of mycotoxins or nitrate in corn silage stored at three temperatures.