不同厚度蒸汽压片处理对玉米活体外瘤胃发酵的影响

doi:10.16431/j.cnki.1671-7236.2015.04.021

›› 2015, Vol. 42 ›› Issue (4): 908-914.doi: 10.16431/j.cnki.1671-7236.2015.04.021

不同厚度蒸汽压片处理对玉米活体外瘤胃发酵的影响

郭亮¹, 乔绿¹, 张敏红², 黄缨³, 邓露芳⁴, 臧长江⁵

1. 北京奶牛中心, 北京 100192;
2. 中国农业科学院北京畜牧兽医研究所, 北京 100193;
3. 天津市动物疫病预防控制中心, 天津 300402;
4. 北京三元种业科技股份有限公司饲料分公司, 北京 101105;
5. 新疆农业大学, 乌鲁木齐 830052

收稿日期:2014-11-19 出版日期:2015-04-20 发布日期:2015-05-05
通讯作者: 乔绿 E-mail:qlfarm@126.com
作者简介:郭亮(1982-),女,河北唐山人,博士,研究方向:饲料质量评价,E-mail:liangliang820202@sohu.com
基金资助:
北京市科技计划课题(D121100003312004)

Effect of Various Thickness Steam-flaked Processing on Ruminal Fermentation of Corn Grains in vitro

GUO Liang¹, QIAO Lv¹, ZHANG Min-hong², HUANG Ying³, DENG Lu-fang⁴, ZANG Chang-jiang⁵

1. Beijing Dairy Cattle Center, Beijing 100192, China;
2. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
3. Tianjin Animal Disease Control and Prevention Center, Tianjin 300402, China;
4. Beijing Sanyuan Breeding Technology Co., Ltd., Feed Branch Company, Beijing 101105, China;
5. Xinjiang Agricultural University, Urumqi 830052, China

Received:2014-11-19 Online:2015-04-20 Published:2015-05-05

摘要/Abstract

摘要： 试验以未处理的玉米及两种不同厚度蒸汽压片玉米(压片厚度为1.5 mm,SFC 1.5;压片厚度为2.0 mm,SFC 2.0)为材料,采用营养成分分析、活体外人工瘤胃产气量试验,研究不同厚度蒸汽压片处理对玉米营养成分、淀粉糊化度和活体外发酵特性的影响.结果表明,不同厚度蒸汽压片处理显著降低玉米粗蛋白质和粗脂肪含量(P<0.05),显著提高了玉米的淀粉糊化度(P<0.05);并且显著提高了玉米在瘤胃液内的淀粉降解率和体外产气速度(P<0.05),显著降低了瘤胃液中氨态氮(NH₃-N)浓度(P<0.05);降低压片厚度(1.5和2.0 mm),蒸汽压片玉米淀粉糊化度增加约17%(88.76%和71.60%),SFC 1.5的体外产气速度、4 h干物质和淀粉产气率显著高于SFC 2.0 (P<0.05).不同厚度蒸汽压片处理对玉米瘤胃48 h产气量、12和24 h瘤胃液pH、总挥发性脂肪酸产量及乙酸、丙酸、乙酸/丙酸、异丁酸、异戊酸、戊酸摩尔比影响均不显著(P>0.05).综上所述,不同厚度蒸汽压片处理可显著提高玉米在瘤胃内淀粉降解率和降解速度,降低瘤胃液中氨态氮浓度,而对48 h产气量及其他发酵参数没有明显影响.

关键词: 蒸汽压片玉米; 活体外瘤胃发酵; 营养物质消化率; 发酵参数

Abstract: Various unprocessed corn, steam-flaked corn (thickness 1.5 mm, SFC 1.5), and steam-flaked corn (thickness 2.0 mm, SFC 2.0) was used in the present study to compare the chemical compositions, starch gelatinization and ruminal fermentation characteristics in vitro of corn grains as affected by various processing based on chemical analysis, in vitro ruminal fermentation and gas production method. The results showed that the contents of crude protein and ether extract decreased (P<0.05), but the starch gelatinization increased (P<0.05);Gas production rate and starch digestibility of SFC were higher than unprocessed corn (P<0.05), but NH₃-N concentrations were lower (P<0.05);The starch gelatinization of SFC 1.5 (88.76%) increased by 17% than that of SFC 2.0 (71.60%);The gas production rate, the digestibility of dry matter and starch of SFC 1.5 in 4 h significantly increased than that of SFC 2.0 (P<0.05). No differences on 48 h gas production, 12 and 24 h pH, total VFA production, the molar proportion of acetate, propionate, acetate/propionate, isovalerate, isobutyrate and valerate (P>0.05). It was concluded that the various thickness steam-flaked corn grains could increase starch digestibility and degradation rate, slow ruminal ammonia release, but would not affect 48 h gas production and other ruminal fermentation traits.

Key words: steam-flaked corn; in vitro rumen fermentation; nutrients digestibility; fermentation traits

中图分类号:

S816

郭亮, 乔绿, 张敏红, 黄缨, 邓露芳, 臧长江. 不同厚度蒸汽压片处理对玉米活体外瘤胃发酵的影响[J]. , 2015, 42(4): 908-914.

GUO Liang, QIAO Lv, ZHANG Min-hong, HUANG Ying, DENG Lu-fang, ZANG Chang-jiang. Effect of Various Thickness Steam-flaked Processing on Ruminal Fermentation of Corn Grains in vitro[J]. , 2015, 42(4): 908-914.

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不同厚度蒸汽压片处理对玉米活体外瘤胃发酵的影响

Effect of Various Thickness Steam-flaked Processing on Ruminal Fermentation of Corn Grains in vitro

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