添加干饲草对湿玉米纤维饲料发酵品质的影响

发布时间：2018-10-05 19:07

【摘要】：由于湿玉米纤维饲料(WCGF)含水量高存贮难,试验研究分别将WCGF与苜蓿干草和羊草进行混合贮存发酵试验,以期延长WCGF的贮存时间,为科学利用WCGF提供理论依据,同时避免因烘干使用而造成的营养物质损失和对空气污染。试验在一个塑料模型筒仓系统中进行(密封,体积:2 754 cm~3),共分为2部分,第一部分:WCGF单独贮存以及与羊草混合贮存,WCGF与羊草的混合比例设定为70:30,80:20和90:10,塑料模型筒仓存放密度为1 000 kg/m~3;第二部分:WCGF单独贮存以及与苜蓿混合贮存,WCGF与苜蓿干草的混合比例设定为70:30,80:20和90:10,塑料模型筒仓存放密度为1 100 kg/m~3。试验结果表明:WCGF单独贮存时发酵强度较低,不同比例混合苜蓿干草或羊草后pH值和氨态氮浓度升高(P0.05)。WCGF与苜蓿干草混合比例为90:10以及与WCGF与羊草混合比例为70:30时均增加乙酸的含量,提高有氧稳定性(P0.05)。因此,选用WCGF与苜蓿干草混合贮存适宜比例90:10,WCGF与羊草的适合混合比例为70:30。
[Abstract]:Due to the high water content of wet corn fiber feed (WCGF), the mixed storage and fermentation of WCGF with alfalfa hay and Leymus chinensis were studied in order to prolong the storage time of WCGF and provide the theoretical basis for the scientific utilization of WCGF. At the same time, avoid the loss of nutrients and air pollution caused by drying. The experiment was conducted in a plastic model silo system (sealing, volume: 2754 cm~3), divided into two parts, Part one: WCGF was stored alone and mixed with Leymus chinensis. The mixing ratio of WCGF and Leymus chinensis was set to 70: 30: 80: 20 and 90: 10. The density of plastic model silo was 1 000 kg/m~3;. The second part: WCGF was stored alone and mixed with alfalfa to store WCGF and dried alfalfa. The mixing ratio of grass is set to 70: 30, 80: 20 and 90: 10, and the density of plastic model silo is 1 100 kg/m~3.. The results showed that the fermentation intensity of WCGF was low when it was stored alone. After mixed alfalfa hay or Leymus chinensis with different proportion, pH value and ammonia nitrogen concentration increased (P0.05). The mixture ratio of WCGF and alfalfa hay was 90:10 and WCGF / Leymus chinensis was 70:30, both increased acetic acid content and improved aerobic stability (P0.05). Therefore, the suitable ratio of WCGF and alfalfa hay for storage was 90: 10WCGF and Leymus chinensis was 70: 30.
【作者单位】：黑龙江省兽药饲料监察所;东北农业大学动物科学技术学院;
【基金】：基金项目:国家奶牛产业技术体系[CARS-37]
【分类号】：S816

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