乳酸菌剂和纤维素酶对青贮香蕉茎叶品质的影响

发布时间：2019-02-15 16:30

【摘要】：本试验旨在探究乳酸菌剂和纤维素酶对香蕉茎叶青贮品质的影响。试验设置4个试验组,分别为0.02 g乳酸菌冻干粉/kg香蕉茎叶、0.2 g纤维素酶/kg香蕉茎叶、0.02 g乳酸菌冻干粉+0.20 g纤维素酶/kg香蕉茎叶组和一个空白对照组。结果显示:乳酸菌组和纤维素酶+乳酸菌组的pH值显著低于纤维素酶组和对照组(P0.05),纤维素酶+乳酸菌组的pH值最低。3个试验组的氨态氮含量都极显著低于对照组(P0.01),氨态氮/总氮都显著低于对照组(P0.05),其中乳酸菌组的氨态氮和氨态氮/总氮最低,氨态氮含量比对照组低26.67%。各试验组未检测出丁酸且乳酸含量都极显著高于对照组(P0.01),其中纤维素酶+乳酸菌组和乳酸菌组的乳酸含量比对照组分别高58.86%和34.39%。青贮后各组的粗蛋白质含量差异不显著,单宁含量较青贮前降低了33.33%,差异极显著(P0.01)。现场评定和实验室评定结果显示,青贮质量由高到低的顺序为纤维素酶+乳酸菌组(优等)乳酸菌组(优等)纤维素酶组(良好)对照组(一般)。说明香蕉茎叶单独青贮是可行的,向其中加入适量的乳酸菌剂或纤维素酶能明显提高青贮品质。若考虑经济效益,对于香蕉茎叶而言,乳酸菌剂是一种有效的青贮添加剂。
[Abstract]:The purpose of this experiment was to investigate the effects of lactic acid bacteria and cellulase on the silage quality of banana stem and leaf. Four test groups were set up: 0.02g lactic acid bacteria freeze-dried powder / kg banana stem and leaf, 0.2g cellulase / kg banana stem and leaf, respectively. 0.02g lactic acid bacteria lyophilized powder 0.20g cellulase / kg banana stem and leaf group and a blank control group. The results showed that the pH values of lactic acid bacteria group and cellulase lactobacillus group were significantly lower than those of cellulase group and control group (P0.05). The pH value of cellulase lactic acid bacteria group was the lowest. The ammonia nitrogen content in the three experimental groups was significantly lower than that in the control group (P0.01), and the ammonia nitrogen / total nitrogen ratio was significantly lower than that in the control group (P0.05). The ammonia nitrogen and ammonia nitrogen / total nitrogen in lactic acid bacteria group were the lowest, and the ammonia nitrogen content was 26.67 7% lower than that in the control group. Butyric acid was not detected and the content of lactic acid in each group was significantly higher than that in control group (P0.01). The content of lactic acid in cellulase lactobacillus group and lactic acid bacteria group was 58.86% and 34.39% higher than that in control group respectively. There was no significant difference in crude protein content after silage, but the content of tannin was 33.33% lower than that before silage (P0.01). The results of field and laboratory evaluation showed that the order of silage quality from high to low was cellulase lactic acid bacteria group (excellent) cellulase group (good) control group (general). The results showed that it was feasible to silage banana stem and leaf alone, and adding appropriate amount of lactic acid bacteria or cellulase to the silage could obviously improve the quality of silage. Lactic acid bacteria is an effective silage additive for banana stem and leaf.
【作者单位】：华南农业大学;
【分类号】：S816.53

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