体外法评价玉米秸秆、小麦秸秆与玉米秸秆青贮的组合效应

发布时间：2018-04-04 12:03

本文选题：体外法　切入点：玉米秸秆　出处：《家畜生态学报》2017年07期

【摘要】：试验旨在利用体外产气法研究玉米秸秆(CS)、小麦秸秆(WS)与玉米秸秆青贮(CSS)的组合效应。试验采用单因素试验设计,首先研究CS与WS,筛选出的最优CS-WS组合后,再与CSS选出最优组合,每个组合设3个重复。结果表明:不同饲料组合间产气量达显著(P0.05)或极显著(P0.01)差异,CS与WS组合的SFAEI在60∶40比例时达到最优、最优CS-WS组合与CSS组合在40∶60产气量达到最优;各饲料间的干物质消失率影响达显著(P0.05)或极显著(P0.01)水平,其最优SFAEI的比例组合分别是50∶50和20∶80;不同饲料组合间pH差异不显著(P0.05);微生物蛋白产量在两组饲料组合中达极显著(P0.01)影响,分别是随小麦秸秆比例的增加而减少、随玉米秸秆青贮比例的增加而增加,其最优SFAEI的比例组合分别是60∶40和40∶60;不同饲料组合间氨态氮浓度影响显著(P0.05),在10.71~26.05mg/dl变化,均在正常浓度范围内;用多项组合效应指数评定各饲料组合的最优比例分别为:CS和WS为60∶40;最优CS-WS组合(60∶40)与CSS为20∶80。综合分析得出:玉米秸秆、小麦秸秆和玉米秸秆青贮三者的适宜组合比例为12∶8∶80。
[Abstract]:The purpose of this study was to study the combined effect of corn straw CSS, wheat straw straw WS) and corn straw silage CSS by gas production in vitro.The single factor experimental design was used. The optimal CS-WS combination was selected after the CS and WSS were studied. Then the optimal combination was selected with CSS, and each combination was divided into 3 replicates.The results showed that the gas production of different feed combinations was significant (P0.05) or extremely significant (P0.01). The SFAEI of CS and WS combinations reached the optimum at 60:40, and the optimal combination of CS-WS and CSS reached the optimum at 40:60.The dry matter disappearance rate among different feed groups reached significant P 0.05) or extremely significant P 0.01) levels.The optimum proportion of SFAEI was 50:50 and 20: 80, respectively; the pH difference between different feed combinations was not significant (P0.05N); the microbial protein yield was significantly affected by P0.01 in the two groups of feed combinations, and decreased with the increase of wheat straw ratio, respectively.With the increase of corn straw silage ratio, the optimal SFAEI ratio was 60:40 and 40: 60 respectively, and the concentration of ammonia nitrogen among different feed combinations had a significant effect on P0.05N, and all of them were within the normal concentration range in the change of 10.71~26.05mg/dl.The optimum ratio of each feed combination is: 1: CS and WS is 60: 40; the optimal CS-WS combination is 60: 40) and the CSS is 20: 80.The optimum combination ratio of corn straw, wheat straw and corn straw silage is 12: 8: 80.
【作者单位】：河北农业大学动物科技学院;河北农业大学动物医学院;
【基金】：公益性行业(农业)科研专项经费(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(CARS-38)
【分类号】：S816.53

【相似文献】