两种含单宁饲草对反刍动物应用的价值研究

发布时间：2018-02-20 17:50

本文关键词： 单宁饲草延边黄牛瘤胃发酵　出处：《饲料工业》2017年07期 　论文类型：期刊论文

【摘要】：试验通过体外发酵法,探讨不同月份两种含单宁饲草对延边黄牛瘤胃发酵指标及甲烷产量的影响,试验样品分别选自2014年6~9月月初吉林延边长白山地区的柞树叶、榛子叶,通过体外发酵试验对柞树叶和榛子叶的适宜利用时间以及饲用价值进行讨论,为这两种可作为添加剂或直接饲喂的含单宁饲草资源的开发利用提供可靠的理论依据。结果表明:6~9月柞树叶和榛子叶在体外发酵过程中pH值均呈下降趋势且在正常范围内变化,发酵结束后(72 h),6、7月柞树叶体外发酵NH_3-N浓度、总甲烷产量显著低于8、9月柞树叶(P0.05),但乙酸和丙酸摩尔比值显著高于8、9月柞树叶(P0.05);7、8月榛子叶体外发酵NH_3-N浓度、总产气量显著低于9月榛子叶(P0.05),但乙酸和丙酸摩尔比值显著高于9月榛子叶(P0.05);并且在发酵后期(24 h以后,含24 h),柞树叶在体外发酵过程中的NH_3-N浓度、产甲烷量及总产气量均远低于同月份同时间点的榛子叶。鉴于单宁含量过高及饲草的收割时期会对反刍动物适口性造成直接影响,结合试验所得:柞树叶和榛子叶是两种开发潜力极高的含单宁饲草,分别在7月初和8月初收割时饲用价值较高,反刍动物采食后可有效减少甲烷排放,降低能量损失,提高氮的利用率,且柞树叶相比于榛子叶更具有开发潜力,可对反刍动物直接饲喂或作为添加剂对其进行补饲。
[Abstract]:The effects of two kinds of tannin forage on rumen fermentation index and methane yield of Yanbian yellow cattle were studied by in vitro fermentation. The samples were selected from oak leaf and hazelnut leaf in Changbai Mountain area of Yanbian Jilin Province from 2014 to early September. The optimum utilization time and feeding value of oak leaf and hazelnut leaf were discussed by in vitro fermentation test. The results showed that the pH value of oak leaf and hazelnut leaf decreased and changed in normal range during in vitro fermentation from 1: 6 to September, which could be used as additive or direct feed for forage resources containing tannin, and the results showed that the pH value of oak leaf and hazelnut leaf decreased during fermentation in vitro, and the results showed that the pH value of oak leaf and hazelnut leaf decreased during in vitro fermentation. In July, the total methane production was significantly lower than that in 8, but the molar ratio of acetic acid to propionic acid was significantly higher than that of 8 in September. The NH_3-N concentration in vitro fermentation of tussah leaves in September and September was higher than that in vitro. The total gas production was significantly lower than that in September, but the molar ratio of acetic acid to propionate was significantly higher than that of P0.05 in September, and the concentration of NH_3-N in leaves of tussah was 24 h after the late fermentation. Methane production and total gas production were significantly lower than those of hazelnut leaves at the same time in the same month. In view of the high tannin content and the direct effect of forage harvesting on the palatability of ruminants, The results showed that tussah leaves and hazelnut leaves were two kinds of forage grass with high development potential, which had high feed value at the beginning of July and early August, respectively. After feeding, the methane emission and energy loss of ruminants could be reduced effectively. Compared with hazelnut leaves, tussah leaves have more potential to develop than hazelnut leaves, and can be fed directly to ruminants or supplemented as additives.
【作者单位】：延边大学农学院;延边朝鲜族自治州农业科学院延边特产研究所;
【基金】：国家自然基金[31460620]
【分类号】：S816

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