山毛豆和甜象草混合青贮饲料品质的研究

发布时间：2018-06-27 20:23

本文选题：山毛豆 + 甜象草　；参考：《广西大学》2017年硕士论文

【摘要】：本研究以山毛豆和甜象草为试验研究对象,分别调制了两种含水率和4种混合比例的山毛豆和甜象草混合青贮,探讨不同的混合比例及含水率对其混合青贮品质的影响,以确定最佳的山毛豆和甜象草的混合比例和含水率,为畜牧业生产的发展提供理论基础。试验一:高水分山毛豆和甜象草混合青贮对青贮营养成分的影响。以含水率为70.24%的山毛豆和73.38%的甜象草为原料,使山毛豆和甜象草按 1:9(19MS)、3:7(37MS)、5:5(55MS)、7:3(73MS)的混合比例调制4种混合青贮。每个处理3次重复,用青贮袋抽吸空气后进行青贮,于发酵第30天打开青贮袋取样,测定PH值和粗蛋白(CP)、粗灰分(Ash)、乳酸(LA)、乙酸(AA)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)及丁酸(PA)和氨态氮(N-NH3)等成分的含量。结果表明,19MS和37MS的水分含量分别为73.16±0.12和72.20±0.53,青贮颜色均为黄色,带有霉味且质地很粘;55MS的水分含量为71.06±0.67,青贮颜色为淡黄绿色,带有淡酸香味且质地处于松散与稍粘之间;73MS的水分含量为70.03±0.78,青贮颜色为淡黄色,带有霉味且质地稍粘。55MS的CP含量与19MS、37MS相比极显著增加(P0.01),却显著低于73MS(P0.05);55MS的Ash和ADF含量极显著低于19MS和37MS(P0.01),与73MS相比无显著差异;四种混合比例中,55MS的NDF最低,其次是73MS和37MS,而19MS最高,但差异均不显著。55MS的PH值与73MS相比差异不显著,与19MS和37MS相比极显著下降(P0.01);55MS的N-NH3含量为最低值,显著低于73MS(P0.05),极显著低于19MS和37MS(P0.01)。55MS的LA含量极显著高于19MS和37MS(P0.01),与73MS相比差异不显著,而其AA含量却极显著低于其余三组(P0.01)。在这四种混合比例中,丙酸和丁酸的含量均几乎检测不到。综合评分,55MS的得分最高,其次是73MS。综合得出,55MS的青贮效果最佳。试验二:低水分山毛豆和甜象草混合青贮对青贮品质的影响。以含水率为60.20%的山毛豆和63.70%的甜象草为原料,使山毛豆和甜象草按1:9(19MS)、3:7(37MS)、5:5(55MS)、7:3(73MS)的混合比例调制 4 种混合青贮。每个处理3次重复,用青贮袋抽吸空气后进行青贮,于发酵第30天打开青贮袋取样,测定PH值和粗蛋白(CP)、粗灰分(Ash)、乳酸(LA)、乙酸(AA)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)及丁酸(PA)和氨态氮(N-NH3)等成分的含量。结果表明,19MS水分含量为63.30±0.01,青贮饲料的颜色为淡黄色,带有霉味,质地稍粘;37MS和73MS的水分含量分别为62.71士0.01和60.24士0.02,青贮饲料的颜色均为淡黄绿色,有淡酸香味且质地较为松散;55MS的水分为61.13±0.02,青贮颜色黄绿色,有酸香味且质地松散。55MS的Ash、NDF和N-NH3含量均为最低值,均极显著低于19MS和37MS(P0.01),显著低于73MS(P0.05),而其CP含量极显著高于19MS和37MS(P0.01),与73MS相比差异不显著。55MS的ADF显著低于19MS和37MS(P0.05),而与73MS 无显著差异。19MS 的 PH 值为 4.72±0.01,37MS 为 4.45±0.03,55MS为4.26±0.02,73MS为4.31±0.01,55MS的PH值最低,显著低于其余三组(P0.05)。55MS的LA含量极显著高于19MS和37MS(P0.01),显著高于73MS(P0.05),而其AA含量与其余三组相比极显著降低(P0.01),四组均未检测出丙酸和丁酸含量。综合得分19MS的综合得分为69.5 分,37MS 为 71.5 分,55MS 为 76.5 分,73MS 为 72.5 分,得知 55MS的效果最优。综合比较得出,55MS混合青贮效果最佳,并且适当降低含水率,青贮品质更佳。
[Abstract]:In this study, the mixed ensiling of two kinds of water content and 4 mixed proportions of Mt. pea and sweet grass was prepared in this study. The effects of different mixing ratio and water content on the quality of Mixed Silage were investigated in order to determine the optimum mixing ratio and water content of the mountain bean and sweet grass for animal husbandry. A theoretical basis is provided. Experiment 1: the effect of Mixed Silage on the silage of high moisture pea and sweet grass is influenced by silage on silage. 4 kinds of mixed silages are modulated by mixing proportion of 1:9 (19MS), 3:7 (37MS), 5:5 (55MS), 7:3 (73MS) in the mixture ratio of 1:9 (19MS), 5:5 (55MS), and 7:3 (73MS)). After pumping air in a silage bag, the silage was carried out after thirtieth days of fermentation, and the contents of pH and CP, crude ash (Ash), lactic acid (LA), acetic acid (AA), neutral detergent fiber (NDF), acid detergent fiber (ADF) and butyric acid (PA) and ammonia nitrogen (N-NH3) were measured. The results showed that the moisture content of 19MS and 37MS was 73.16, respectively. 0.12 and 72.20 + 0.53, the silage is yellow, with mildew and sticky texture; the moisture content of 55MS is 71.06 + 0.67, the silage color is yellowish green, with a light acid flavor and a loose and slightly sticky texture; the moisture content of 73MS is 70.03 + 0.78, the silage color is pale yellow, and the CP content with moldy taste and slightly sticky.55MS and 19M S, 37MS significantly increased (P0.01), but significantly lower than 73MS (P0.05). The Ash and ADF content of 55MS was significantly lower than 19MS and 37MS (P0.01), and there was no significant difference compared with 73MS. The four mixed ratios were the lowest, followed by the highest, but the difference was not significant. The N-NH3 content of 55MS was significantly lower than that of 73MS (P0.05), and the LA content which was significantly lower than 19MS and 37MS (P0.01).55MS was significantly higher than 19MS and 37MS (N-NH3), but the content was significantly lower than that of the other three groups. In these four mixing ratios, propionic acid and butyric acid contained a significant difference. The total score was almost not detected. The score of 55MS was the highest, followed by the 73MS. synthesis that 55MS had the best silage effect. Test two: the effect of the Mixed Silage on the silage with low moisture mountain beans and sweet grass. With the water content of 60.20% and 63.70% sweet grass as raw material, 1:9 (19MS) and 3:7 (37MS) were made by the pea and the sweet grass. 5:5 (55MS), 7:3 (73MS) mixed proportions of 4 kinds of Mixed Silage. Each treatment was repeated 3 times, and stored in a silage bag after sucking air in a silage bag. The pH value and crude protein (CP), crude ash (Ash), lactic acid (LA), acetic acid (AA), neutral detergent fiber (NDF), acid detergent fiber (ADF), and butyric acid (PA) and ammonia nitrogen (PA) were used for thirtieth days of fermentation. The content of N-NH3) was 63.30 + 0.01. The water content of 19MS was 63.30 + 0.01, the color of the silage was yellowish, with mildew and slightly sticky, and the water content of 37MS and 73MS were 62.71 and 60.24 and 0.02 respectively. The color of the silage was pale yellow green, with light acid and loose texture; the moisture of 55MS was 61.13 + 0.02, The silage color is yellow green, the content of Ash with acid flavor and loose texture.55MS, NDF and N-NH3 is the lowest, which is significantly lower than 19MS and 37MS (P0.01), significantly lower than 73MS (P0.05), but the CP content is significantly higher than 19MS and 37MS. The pH value of.19MS is 4.72 + 0.01,37MS and 4.45 + 0.03,55MS is 4.26 + 0.02,73MS and 4.31 + 0.01,55MS. It is significantly lower than the other three groups (P0.05).55MS, which is significantly higher than 19MS and 37MS (P0.01), significantly higher than that of 73MS, but the content of LA is significantly lower than that of the other three groups. The four groups have not detected propionic acid and the four groups. The comprehensive score of 19MS was 69.5, 37MS was 71.5, 55MS was 76.5, and 73MS was 72.5. It was found that the effect of 55MS was the best. The comprehensive comparison showed that the effect of 55MS Mixed Silage was the best, and the water content was reduced and the silage quality was better.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S816.53

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