体外法评价玉米秸秆、谷草和玉米秸秆青贮饲料组合效应研究

发布时间：2018-06-04 14:55

本文选题：玉米秸秆 + 谷草　；参考：《草业学报》2017年05期

【摘要】：本试验旨在利用体外产气法研究玉米秸秆(CS)、谷草(MS)与玉米秸秆青贮饲料(CSS)间的组合效应,筛选出不同饲料间的适宜组合比例。试验采用单因素试验设计,首先将玉米秸秆与谷草进行体外发酵试验,筛选出的最优组合,再与玉米秸秆青贮饲料组合进行试验,以上组合均以100∶0,80∶20,60∶40,50∶50,40∶60,20∶80,0∶100的比例进行,每个组合设3个重复,测定和分析不同粗饲料组合对体外产气量、干物质消失率、pH、微生物蛋白、氨态氮、挥发性脂肪酸的影响,计算出各组合的单项组合效应值和综合组合效应值。试验结果表明,不同饲料组合对产气量和干物质消失率影响显著或极显著(P0.05或P0.01);不同饲料组合间pH差异不显著(P0.05);各饲料组合间微生物蛋白产量差异显著或极显著(P0.05或P0.01),玉米秸秆与谷草组合的微生物蛋白产量随玉米秸秆比例的减少而减少,再与玉米秸秆青贮饲料组合随玉米秸秆青贮饲料比例的增加而增加;不同饲料组合的氨态氮浓度差异显著或极显著(P0.05或P0.01),含量为17.35~24.63mg/dL;各饲料组合间的挥发性脂肪酸产量差异显著或极显著(P0.05或P0.01)。以多项组合效应指数评定的最优组合为:玉米秸秆和谷草的搭配比例为60∶40,玉米秸秆、谷草、玉米秸秆青贮饲料的搭配比例为12∶8∶80。
[Abstract]:The purpose of this study was to study the combination effect of CSS and CSS of corn straw silage in vitro, and to select the suitable proportion of different forages. The experiment was designed by single factor experiment. Firstly, the optimum combination of corn straw and cereal straw was selected, and then the combination of corn straw silage and corn straw silage was tested. The above combinations were all carried out in the proportion of 100: 80: 20: 20: 4050: 50: 40: 60: 60: 20: 80: 100. Each combination had three repetitions to determine and analyze the effects of different forage combinations on gas production in vitro, dry matter disappearance rate (pH), microbial protein, and ammonia nitrogen. The effects of volatile fatty acids on single combination effect and comprehensive combination effect of each combination were calculated. The results show that The effects of different feed combinations on gas production and dry matter disappearance rate were significant or extremely significant (P0.05 or P0.01); there was no significant difference in pH between different feed combinations (P0.05); and there were significant or extremely significant differences in microbial protein production among different feed combinations (P0.05 or P0.01), and corn straw had a significant or extremely significant difference in the yield of microbial protein (P 0.05) and corn straw (P 0.01). The yield of microbial protein combined with cereal straw decreased with the decrease of corn straw ratio. The combination of corn straw silage and corn straw silage increased with the increase of the proportion of corn straw silage. The concentration of ammonia nitrogen in different feed combinations was significantly or extremely significant (P 0.05 or P 0.01), and the content was 17.35 ~ 24.63 mg / dL, and the yield of volatile fatty acids in different feed combinations was significantly or extremely significant (P0.05 or P0.01). The optimum combination is: the proportion of corn straw and cereal straw is 60: 40, the proportion of corn straw, cereal straw and corn straw silage is 12: 8: 80.
【作者单位】：河北农业大学动物医学院;河北农业大学动物科技学院;
【基金】：公益性行业(农业)科研专项(201503134) 河北省科技计划项目(16226604D) 国家现代农业产业技术体系建设专项资金资助
【分类号】：S816.53

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