南方农区小麦秸秆与非常规饲料的组合利用

发布时间：2018-11-12 14:32

【摘要】：本研究采用体外产气法,研究南方农区小麦秸秆(WS)与非常规饲料喷浆玉米皮(SCB)、大豆皮(SH)、橘子皮(OP)、苹果渣(AP)分别按0∶100、25∶75、50∶50、75∶25、100∶0比例两两组合后的体外产气特性。将采集的山羊瘤胃液与人工唾液混合并加入饲料样品,在产气瓶中恒温厌氧发酵以模拟瘤胃发酵过程。结果表明,小麦秸秆与4种非常规饲料组合后,理论最大产气量(HM)显著增加,产气速率(B)加快,产气延滞时间(Lag)缩短。WS与SCB组合的乙酸丙酸摩尔比显著低于WS的(P0.05)。小麦秸秆与4种非常规饲料组合后,实现了饲料间营养素的互补,可有效改善小麦秸秆的发酵能力,WS∶SCB为75∶25、WS∶OP为50∶50、WS∶AP为75∶25、WS∶SH为75∶25时正组合效应最佳。小麦秸秆与喷浆玉米皮组合中随着SCB所占比例的增加丙酸摩尔浓度增加,由于丙酸转化为能量的效率高于乙酸,因此丙酸摩尔浓度增加更有利于提高饲料的转化效率,更适合家畜育肥。
[Abstract]:In this study, in vitro gas production method was used to study wheat straw (WS) and (SCB), soybean peel (SH), orange peel (OP), in southern agricultural area. The in vitro gas production characteristics of apple pomace (AP) in two combinations: 0: 100: 25: 75: 25: 100: 0. Goat rumen fluid was mixed with artificial saliva and fed with feed sample to simulate the rumen fermentation process. The results showed that the theoretical maximum gas production (HM) increased significantly and the gas production rate (B) accelerated after wheat straw was combined with four kinds of unconventional feed. The gas production delay time (Lag) was shortened, and the molar ratio of propionate acetate in combination of WS and SCB was significantly lower than that of WS (P0.05). After the combination of wheat straw and four kinds of unconventional feed, the nutrient supplement between the feeds was realized, and the fermentation ability of wheat straw was improved effectively. The WS:SCB of wheat straw was 75: 25 W: op, 50: 50 W / W AP was 75: 25, respectively. The positive combination effect of WS:SH is the best at 75:25. The molar concentration of propionic acid increased with the increase of the proportion of SCB in wheat straw and spraying corn husk. Because the conversion efficiency of propionic acid to energy was higher than that of acetic acid, the higher the molar concentration of propionic acid was, the better the conversion efficiency of feed was. More suitable for livestock fattening.
【作者单位】：江苏省农业科学院六合动物科学基地;
【基金】：江苏省农业科技自主创新基金项目[CX(14)2103] 公益性(农业)行业科研专项(201203050-4)
【分类号】：S816

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