Effects of a microbial inoculant and(or) sugarcane molasses on the fermentation, aerobic stability, and digestibility of bermudagrass ensiled at two moisture contents.
Effects of a microbial inoculant and(or) sugarcane molasses on the fermentation, aerobic stability, and digestibility of bermudagrass ensiled at two moisture contents.
复制标题
微生物接种剂和（或）甘蔗糖蜜对两种水分含量青贮狗牙根发酵、有氧稳定性和消化率的影响。
DOI：
10.2527/1991.69114588x
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发表时间：
1991
影响因子：
3.3
通讯作者：
W. Mahanna
中科院分区：
文献类型：
--
作者：
R. Umana;C. Staples;D. Bates;C. J. Wilcox;W. Mahanna
收获Tifton 81狗牙根并直接青贮（D; 32.4%DM）或萎蔫青贮（W; 44.1%DM）。应用于每种收获方法的四种处理是1）对照（C），或无添加剂; 2）干甘蔗糖蜜（M），5%DM; 3）微生物接种剂（I; Pioneer 1174）;和4）处理2和3的组合（MI）。萎蔫降低了青贮饲料pH值的下降速率（P = 0.001），并产生了乳酸浓度更高（P = 0.069），乙酸（P = 0.001）和氨含量更低（P = 0.001），体外OM（IVOMD; P = 0.001）和ADF消化率（IVADFD; P = 0.001）更高的青贮饲料。这些高品质的青贮饲料在有氧条件下不太稳定，这可以通过更高的平均温度（P = .001）和更高的酵母菌和霉菌计数（P = .001）来证明。添加M到D饲料导致青贮饲料具有较低的pH值（P =.001），更高的乳酸浓度（P = .001），更大的IVOMD（P = .092），以及较低的乙酸（P = .009）和氨浓度（P = .002）比接种D青贮饲料。与单独用M或I处理的青贮饲料相比，用MI处理的萎蔫青贮饲料平均pH值较低（P = .025），乳酸含量较高（P =.001）和IVOMD（P =.001），乙酸和氨浓度较低（P = .001）。这些结果表明，萎蔫改善狗牙根青贮饲料的最，糖蜜和接种剂的添加萎蔫狗牙根进一步提高青贮饲料的质量。
Tifton 81 bermudagrass was harvested and ensiled either directly (D; 32.4% DM) or wilted (W; 44.1% DM). Four treatments applied to each harvesting method were 1) control (C), or no additive; 2) dried cane molasses (M) at 5% of DM; 3) microbial inoculant (I; Pioneer 1174); and 4) a combination of Treatments 2 and 3 (MI). Wilting reduced the rate of decline of silage pH (P = .001) and produced silages with greater lactic acid concentrations (P = .069), lower acetic acid (P = .001) and ammonia contents (P = .001), and greater in vitro OM (IVOMD; P = .001) and ADF digestibilities (IVADFD; P = .001). These high-quality silages were less stable under aerobic conditions, as evidenced by greater average temperatures (P = .001) and greater yeast and mold counts (P = .001). Adding M to D forage resulted in silage with lower pH (P = .001), greater concentration of lactic acid (P = .001), greater IVOMD (P = .092), and lower acetic acid (P = .009) and ammonia concentrations (P = .002) than inoculated D silage. Wilted silage treated with MI averaged lower pH (P = .025), greater lactic acid content (P = .001) and IVOMD (P = .001), and lower acetic acid (P = .001) and ammonia concentrations than silages treated with M or I alone. These results indicate that wilting improved bermudagrass silage the most, and that the addition of molasses and inoculant to wilted bermudagrass further enhanced silage quality.