灌木类饲用植物沙柳饲料化利用技术研究
发布时间：2019-02-15 03:48
【摘要】：本论文主要研究了不同发酵时间对沙柳混合发酵饲料发酵品质和营养价值的影响,并进一步研究不同发酵时间的沙柳混合发酵饲料对绵羊瘤胃发酵参数的影响,探讨沙柳混合发酵饲料的最佳发酵时间；在此基础上,通过饲养试验研究沙柳混合发酵饲料对绵羊生产性能及营养物质表观消化率的影响,为今后开展沙柳发酵饲料在反刍动物生产中的应用提供基础数据。本论文包括四部分。试验一和试验二主要研究发酵时间对沙柳混合发酵饲料发酵品质和营养价值的影响。试验按不同沙柳比例调制成2组混合发酵饲料,分别用FF1和FF2表示,在各组中添加等量的复合菌剂,考察发酵饲料在发酵1、3、5、7、10、12、15、22、30、45和60天时,发酵饲料的感官品质、发酵品质、营养成分以及体外消化率随时间的变化规律。试验三采用体外产气法研究不同发酵时间的沙柳混合发酵饲料对绵羊瘤胃发酵参数的影响。在试验一和试验二的基础上,研究不同发酵天数的沙柳混合发酵饲料对体外培养96 h的累积产气量、消化动力学参数和24 h的瘤胃发酵特性指标的影响。试验四主要研究沙柳混合发酵饲料对绵羊生产性能及营养物质表观消化率的影响。根据试验二和试验三的结果,用发酵30天的沙柳混合发酵饲料饲喂绵羊,试验选择体况接近的小尾寒羊44只,随机分成2组,每组22只。试验1组饲喂90% FF1+10%羊草,试验2组饲喂90% FF2+10%羊草；此外,在试验期每只羊每天饲喂0.5kg正大586育肥料。在本试验条件下得出：(1)随着发酵时间的延长,沙柳混合发酵饲料的感官品质无显著变化,pH值显著下降(P0.0001),乙酸和乳酸含量显著升高(P0.0001),NH3-N/TN呈先升高后降低的趋势,在整个发酵过程中都没有检测到丁酸。FF1组和FF2组的发酵效果无显著差异,且均属于优等发酵饲料。(2)’随着发酵时间的延长,沙柳混合发酵饲料的NDF、ADF和ADL含量显著降低(P0.0001),并显著提高DM、OM、CP、NDF和ADF的体外消化率(P0.0001)。FF1组的营养品质优于FF2组。(3)在体外培养条件下,沙柳经混合发酵处理后可以显著提高了瘤胃BCP和VFA浓度(P0.0001),降低了瘤胃pH值、NH3-N浓度、丁酸浓度和乙酸／丙酸的比例(P0.0001),而且FF1组对瘤胃内环境的影响优于FF2组。(4)利用沙柳混合发酵饲料饲喂绵羊,可显著提高绵羊体重和干物质采食量(P0.05),试验1组和试验2组之间的各营养物质表观消化率差异不显著(P0.05)。(5)沙柳经混合发酵处理后,可显著提高发酵饲料的发酵品质和营养价值,改善瘤胃内环境和提高绵羊的生产性能,而且沙柳混合发酵饲料在发酵30天后趋于稳定状态。
[Abstract]:In this paper, the effects of different fermentation time on the quality and nutritional value of mixed fermenting feed of Salix willow were studied, and the effects of different fermentation time on rumen fermentation parameters of sheep were studied. The optimum fermentation time for mixed fermenting feed of Salix wilfordii was discussed. On this basis, the effects of mixed fermenting feed of Salix willow on the performance and apparent digestibility of nutrients in sheep were studied through feeding experiments, which provided basic data for the application of fermenting feed of Salix in ruminant production in the future. This paper includes four parts. The effects of fermentation time on the fermentation quality and nutritional value of mixed fermenting feed of Salix wilfordii were studied in experiment 1 and experiment 2. In the experiment, two groups of mixed fermenting feed were prepared according to different proportion of Salix. The sensory quality of fermented feed was investigated when fermented feed was fermented for 1 ~ 3 ~ 3 ~ 5 ~ 5 ~ 5 ~ 7 ~ 10 ~ 10 ~ 12 ~ 1522 ~ (22) C ~ (30) ~ (45) and 60 days, respectively, expressed by FF1 and FF2, adding the same amount of compound fungicides in each group. The variation of fermentation quality, nutrient composition and digestibility in vitro with time. In experiment 3, the effects of mixed fermenting feed on rumen fermentation parameters of sheep with different fermentation time were studied by in vitro gas production method. On the basis of experiment 1 and experiment 2, the effects of different fermentation days on cumulative gas production, digestion kinetic parameters and 24 h rumen fermentation characteristics were studied. The effects of mixed fermenting feed of Salix wilfordii on the performance and apparent digestibility of nutrients in sheep were studied in the fourth experiment. According to the results of experiment 2 and experiment 3, 44 small tail Han sheep were fed with mixed fermenting feed of Salix willow for 30 days. 44 small tail Han sheep were randomly divided into 2 groups, 22 in each group. In the first group, 90% FF1 10% Leymus chinensis was fed, and the second group was fed 90% FF2 10% Leymus chinensis, in addition, each sheep was fed with 0.5kg Zhengda 586 fertiliser every day during the trial period. The results showed that: (1) with the increase of fermentation time, the sensory quality of mixed fermenting feed did not change significantly, the pH value decreased significantly (P0.0001), and the contents of acetic acid and lactic acid increased significantly (P0.0001). NH3-N/TN increased first and then decreased. Butyric acid was not detected in the whole fermentation process. There was no significant difference between FF1 group and FF2 group, and both of them belonged to superior fermentative feed. (2) with the increase of fermentation time, there was no significant difference in fermentation effect between FF1 group and FF2 group. (2) with the increase of fermentation time, The content of NDF,ADF and ADL in mixed fermenting feed of Salix willow decreased significantly (P0.0001), and the digestibility of DM,OM,CP,NDF and ADF in vitro (P0.0001). The nutritional quality of FF1 group was better than that of FF2 group. (3) in vitro culture, the nutrient quality of FF1 group was better than that of FF2 group. After mixed fermentation, the rumen BCP and VFA concentrations were significantly increased (P0.0001), and the rumen pH value, NH3-N concentration, butyric acid concentration and acetic acid / propionic acid ratio (P0.0001) were decreased. The effect of FF1 group on rumen environment was better than that of FF2 group. (4) feeding sheep with mixed fermentative feed of Salix willow could significantly increase body weight and dry matter intake (P0.05). There was no significant difference in apparent digestibility of nutrients between group 1 and group 2 (P0.05). (5). After mixed fermentation, the fermentation quality and nutritional value of fermented feed were significantly improved. The rumen environment was improved and the performance of sheep was improved, and the mixed fermenting feed of Salix willow tended to be stable after 30 days of fermentation.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S816.6
本文编号：2422931
[Abstract]:In this paper, the effects of different fermentation time on the quality and nutritional value of mixed fermenting feed of Salix willow were studied, and the effects of different fermentation time on rumen fermentation parameters of sheep were studied. The optimum fermentation time for mixed fermenting feed of Salix wilfordii was discussed. On this basis, the effects of mixed fermenting feed of Salix willow on the performance and apparent digestibility of nutrients in sheep were studied through feeding experiments, which provided basic data for the application of fermenting feed of Salix in ruminant production in the future. This paper includes four parts. The effects of fermentation time on the fermentation quality and nutritional value of mixed fermenting feed of Salix wilfordii were studied in experiment 1 and experiment 2. In the experiment, two groups of mixed fermenting feed were prepared according to different proportion of Salix. The sensory quality of fermented feed was investigated when fermented feed was fermented for 1 ~ 3 ~ 3 ~ 5 ~ 5 ~ 5 ~ 7 ~ 10 ~ 10 ~ 12 ~ 1522 ~ (22) C ~ (30) ~ (45) and 60 days, respectively, expressed by FF1 and FF2, adding the same amount of compound fungicides in each group. The variation of fermentation quality, nutrient composition and digestibility in vitro with time. In experiment 3, the effects of mixed fermenting feed on rumen fermentation parameters of sheep with different fermentation time were studied by in vitro gas production method. On the basis of experiment 1 and experiment 2, the effects of different fermentation days on cumulative gas production, digestion kinetic parameters and 24 h rumen fermentation characteristics were studied. The effects of mixed fermenting feed of Salix wilfordii on the performance and apparent digestibility of nutrients in sheep were studied in the fourth experiment. According to the results of experiment 2 and experiment 3, 44 small tail Han sheep were fed with mixed fermenting feed of Salix willow for 30 days. 44 small tail Han sheep were randomly divided into 2 groups, 22 in each group. In the first group, 90% FF1 10% Leymus chinensis was fed, and the second group was fed 90% FF2 10% Leymus chinensis, in addition, each sheep was fed with 0.5kg Zhengda 586 fertiliser every day during the trial period. The results showed that: (1) with the increase of fermentation time, the sensory quality of mixed fermenting feed did not change significantly, the pH value decreased significantly (P0.0001), and the contents of acetic acid and lactic acid increased significantly (P0.0001). NH3-N/TN increased first and then decreased. Butyric acid was not detected in the whole fermentation process. There was no significant difference between FF1 group and FF2 group, and both of them belonged to superior fermentative feed. (2) with the increase of fermentation time, there was no significant difference in fermentation effect between FF1 group and FF2 group. (2) with the increase of fermentation time, The content of NDF,ADF and ADL in mixed fermenting feed of Salix willow decreased significantly (P0.0001), and the digestibility of DM,OM,CP,NDF and ADF in vitro (P0.0001). The nutritional quality of FF1 group was better than that of FF2 group. (3) in vitro culture, the nutrient quality of FF1 group was better than that of FF2 group. After mixed fermentation, the rumen BCP and VFA concentrations were significantly increased (P0.0001), and the rumen pH value, NH3-N concentration, butyric acid concentration and acetic acid / propionic acid ratio (P0.0001) were decreased. The effect of FF1 group on rumen environment was better than that of FF2 group. (4) feeding sheep with mixed fermentative feed of Salix willow could significantly increase body weight and dry matter intake (P0.05). There was no significant difference in apparent digestibility of nutrients between group 1 and group 2 (P0.05). (5). After mixed fermentation, the fermentation quality and nutritional value of fermented feed were significantly improved. The rumen environment was improved and the performance of sheep was improved, and the mixed fermenting feed of Salix willow tended to be stable after 30 days of fermentation.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S816.6
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