Effects of Adding Propionic Acid on Fermentation Quality and Aerobic Stability of Mixed Silage of Hullessbarley Straw and Perennial Ryegrass in Tibet

doi:10.11733/j.issn.1007-0435.2015.03.023

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (3): 594-600.DOI: 10.11733/j.issn.1007-0435.2015.03.023

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Effects of Adding Propionic Acid on Fermentation Quality and Aerobic Stability of Mixed Silage of Hullessbarley Straw and Perennial Ryegrass in Tibet

XIN Peng-cheng^1,4, YUAN Xian-jun¹, GUO Gang^1,3, WEN Ai-you¹, Xiao Shen-hua¹, CAN Mu-you², CHEN Yu-xiang², SHAO Tao¹

1. Institute of Ensiling and Processing of Grass, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China;
2. Tibet agriculture and animal husbandry academy of sciences institute of animal husbandry and veterinary science, Lasa, Tibet 850003, China;
3. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;
4. Tianshui City Maiji District bureau of animal husbandry and veterinary medicine, Tianshui, Gansu Province 741020, China

Received:2014-04-14 Revised:2014-07-18 Online:2015-06-15 Published:2015-07-02

添加丙酸对青稞秸秆和多年生黑麦草混合青贮发酵品质及有氧稳定性的影响

辛鹏程^1,4, 原现军¹, 郭刚^1,3, 闻爱友¹, 肖慎华¹, 参木有², 陈裕祥², 邵涛¹

1. 南京农业大学饲草调制加工与贮藏研究所, 江苏南京 210095;
2. 西藏自治区农牧科学院畜牧兽医科学研究所, 西藏拉萨 850003;
3. 山西农业大学动物科学技术学院, 山西太谷 0308012;
4. 天水市麦积区畜牧兽医局, 甘肃天水 741020

通讯作者: 邵涛
作者简介:辛鹏程(1987-),男,甘肃天水人,硕士研究生,主要从事饲草调制加工研究,E-mail:xinpengcheng001@163.com
基金资助:
“十二五”国家科技支撑计划“藏北退化草地综合整治技术与示范”(2011BAC09B03);西藏主要农作物秸秆与栽培牧草混合青贮关键技术研究(XZ20093ZD);中国科学院西藏区域创新平台建设项目“西藏典型农业村(吉纳村)草地农业体系建设与产业化示范”资助

Abstract

Abstract:

This study was carried out to evaluate the effects of adding propionic acid on the fermentation quality and aerobic stability of mixed silages of hullessbarley straw and perennial ryegrass. There were three treatments of different propionic acid addition ratios (0.3%, 0.4% or 0.5% of fresh weight) plus a control. Silos were opened on 30th day of ensiling, six silos per treatment were used for fermentation quality determination, and other silages were exposed to the air for 12 days and subjected to an aerobic stability evaluation. The results showed that the fermentation quality of all treatments were well. There were no significant difference in pH value, lactic acid and dry matter contents among all treatments, however, lactic acid /acetic acid and water soluble carbohydrate in propionic acid treatments (except PA3) were significantly higher than control(P<0.05).The propionic treatments showed significantly lower ammonia-N/total-N and butyric acid content compared with control(P<0.05). During aerobic exposure, the pH value of 0.4% and 0.5% propionic acid addition increased more slowly than that of control and 0.3% propionic acid addition silages. The lactic acid, water soluble carbohydrate and dry matter content decreased gradually during aerobic exposure, and increased with propionic acid addition ratio. The value of ammonia-N/total-N and butyric acid content of all silages increased during aerobic exposure, and these of 0.4% and 0.5% propionic acid addition silages were always significantly lower than control and 0.3% addition silages(P<0.05). These results indicated that adding 0.4% or above propionic acid could improve the fermentation quality and aerobic stability of the mixed silage.

Key words: Propionic acid, Hullessbarley straw, Perennial ryegrass, Mixed ensilage, Fermentation quality, Aerobic stability

摘要：

为探讨不同水平丙酸对青稞(Hordeum vulgare)秸秆和多年生黑麦草(Lolium perenne)混合青贮发酵品质及有氧稳定性的影响,试验设0(CK), 0.3%(PA3), 0.4%(PA4)和0.5%丙酸(PA5)4个处理组。青贮后第30 d开窖取样测定发酵品质,并有氧暴露12 d分析有氧稳定性。结果表明:各组pH值、乳酸和干物质含量差异不显著,但丙酸添加组乳酸/乙酸(除PA3组)和水溶性碳水化合物含量显著高于对照组(P<0.05),氨态氮/总氮和丁酸含量显著低于对照组(P<0.05)。有氧暴露阶段,PA4和PA5组pH值与对照组和PA3组相比上升幅度较小,乳酸、干物质含量损失较少,且水溶性碳水化合物含量随着丙酸添加量的增大而升高。随着暴露时间延长,各组氨态氮/总氮值和丁酸含量逐渐升高,且PA4和PA5组显著低于对照组和PA3组(P<0.05)。表明添加0.4%以上的丙酸能够改善混合青贮饲料的发酵品质和有氧稳定性。

关键词: 丙酸, 青稞秸秆, 多年生黑麦草, 混合青贮, 发酵品质, 有氧稳定性

CLC Number:

S816.53

XIN Peng-cheng, YUAN Xian-jun, GUO Gang, WEN Ai-you, Xiao Shen-hua, CAN Mu-you, CHEN Yu-xiang, SHAO Tao. Effects of Adding Propionic Acid on Fermentation Quality and Aerobic Stability of Mixed Silage of Hullessbarley Straw and Perennial Ryegrass in Tibet[J]. Acta Agrestia Sinica, 2015, 23(3): 594-600.

辛鹏程, 原现军, 郭刚, 闻爱友, 肖慎华, 参木有, 陈裕祥, 邵涛. 添加丙酸对青稞秸秆和多年生黑麦草混合青贮发酵品质及有氧稳定性的影响[J]. 草地学报, 2015, 23(3): 594-600.

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Effects of Adding Propionic Acid on Fermentation Quality and Aerobic Stability of Mixed Silage of Hullessbarley Straw and Perennial Ryegrass in Tibet

添加丙酸对青稞秸秆和多年生黑麦草混合青贮发酵品质及有氧稳定性的影响

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