Effect of lactic acid bacteria preparations on microbial population counts and silage quality in maize silage during fermentation and on aerobic exposure

doi:10.11686/cyxb2019581

Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (11): 83-90.DOI: 10.11686/cyxb2019581

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Effect of lactic acid bacteria preparations on microbial population counts and silage quality in maize silage during fermentation and on aerobic exposure

WAN Xue-rui¹, DOU Si-yuan², LI Yu³, HE Yi-qun¹, WANG Chuan¹, ZHANG Xiao-li¹, LEI Zhao-min^4,*

1. College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China;
2. Gansu Provincial Center for Animal Disease Control and Prevention, Lanzhou 730046, China;
3. Gansu Animal Husbandry Technology Extension Station, Lanzhou 730030, China;
4. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China

Received:2019-12-31 Revised:2020-02-11 Online:2020-11-20 Published:2020-11-20
Contact: *E-mail: leizm@gsau.edu.cn
Supported by:
甘肃农业大学兽医学省级特色学科开放课题(GSAU-XKJS-2018-071),甘肃省农业生物技术研究与应用开发项目(GNSW-2012-25),国家绒毛用羊产业技术体系岗位专家项目(CARS-39-18),甘肃省科技重大专项计划(17ZD2NC020),兰州市科技局重点项目(2012-2-159),甘肃省农业农村厅现代丝路寒旱农业专项(GSSLCSX-2020-1)和甘肃省高等学校产业支撑计划项目(2020C-08)资助

Abstract

Abstract: This research investigated the effect of lactic acid bacteria (LAB) preparations on microbial population counts and silage quality of whole maize silage during fermentation and on aerobic exposure after fermentation. The aim was to test if inoculation with LAB preparations can improve silage quality and aerobic stability. Three different LAB preparations [Homofermentative (Homo), Heterofermentative (Hetero), combined Homo+Hetero] were added to whole maize during ensiling. A blank control treatment was also included. Data on microbial population count, fermentation quality and nutrient contents of silage were evaluated during fermentation at 3, 7, 15, and 30 days after ensiling, and on completion of fermentation, after 1, 3, 7, 15 and 30 days of aerobic exposure. It was found that both during maize silage fermentation and during subsequent aerobic exposure, the LAB population counts, the lactic and acetic acid concentrations were significantly increased compared with the blank control treatment, while the numbers of aerobic bacteria, yeasts and molds and crude protein loss were significantly reduced and the concentrations of NH₃-N and the pH were obviously reduced by addition of the three LAB preparations. These results indicate that LAB preparations improve maize silage nutritional quality and inhibit secondary fermentation after aerobic exposure. The combination treatment Homo+Hetero performed best, and Homo performed better than Hetero.

Key words: whole corn, microbial number, lactic acid bacterial compound, ensiling quality

WAN Xue-rui, DOU Si-yuan, LI Yu, HE Yi-qun, WANG Chuan, ZHANG Xiao-li, LEI Zhao-min. Effect of lactic acid bacteria preparations on microbial population counts and silage quality in maize silage during fermentation and on aerobic exposure[J]. Acta Prataculturae Sinica, 2020, 29(11): 83-90.

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Effect of lactic acid bacteria preparations on microbial population counts and silage quality in maize silage during fermentation and on aerobic exposure

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