Limón-Hernández Daniel, Rayas-Amor Adolfo Armando, García-Martínez Anastacio, Estrada-Flores Julieta Gertrudis, López Mayra Núñez, Cruz Monterrosa Rosy G, Morales-Almaráz Ernesto
Departamento de Nutrición Animal, Facultad de Medicina Veterinaria y Zootecnia de la Universidad Autónoma del Estado de México, Toluca, Mexico.
Departamento de Ciencias de la Alimentación de la Universidad Autónoma Metropolitana Unidad Lerma, Lerma de Villada, Mexico.
Trop Anim Health Prod. 2019 Jul;51(6):1579-1584. doi: 10.1007/s11250-019-01849-7. Epub 2019 Feb 28.
The objective of this study was to investigate the effect of four levels of molasses on chemical composition, in vitro digestibility, methane production and fatty acid profile of canola silages. A canola (Brassica napus var. Monty) crop was established in a small-scale agricultural farm and harvested 148 days after sowing. Four levels of molasses were tested with respect to the fresh weight (1.5 kg); these were 1% (CS-1), 2% (CS-2), 3% (CS-3) and 4% (CS-4) molasses, and 0% molasses (CS-0) was included as a control. A total of 45 microsilages were prepared using PVC pipes (4 in. of diameter × 20 cm of length), and the forage was compressed using a manual press. The effects of control and treatments were tested using the general linear model Y = μ + T + E. The linolenic acid (C18:3n3), palmitic acid (C16:0) and linoleic acid methyl ester (C18:2n6c) accounted for 30%, 21% and 10.5% of total fatty acids, respectively; the fermentation parameters and in vitro methane production were not affected (P > 0.05) by treatments; in vitro digestibility decreased significantly (P < 0.05) as the level of molasses increased. It was concluded that CS-4 improved the DM content by 9% and showed high content of linolenic acid methyl ester. The gross energy of canola silages could favour the oleic acid methyl ester.
本研究的目的是调查四种水平的糖蜜对油菜青贮饲料的化学成分、体外消化率、甲烷产量和脂肪酸谱的影响。在一个小型农业农场种植了油菜（甘蓝型油菜品种蒙蒂）作物，并在播种后148天收获。针对鲜重（1.5千克）测试了四种水平的糖蜜；分别为1%（CS-1）、2%（CS-2）、3%（CS-3）和4%（CS-4）的糖蜜，并将0%糖蜜（CS-0）作为对照。使用PVC管（直径4英寸×长度20厘米）制备了总共45个微型青贮饲料，并用手动压榨机对草料进行压缩。使用一般线性模型Y = μ + T + E测试对照和处理的效果。亚麻酸（C18:3n3）、棕榈酸（C16:0）和亚油酸甲酯（C18:2n6c）分别占总脂肪酸的30%、21%和10.5%；处理对发酵参数和体外甲烷产量没有影响（P > 0.05）；随着糖蜜水平的增加，体外消化率显著降低（P < 0.05）。得出的结论是，CS-4使干物质含量提高了9%，并显示出高含量的亚麻酸甲酯。油菜青贮饲料的总能可能有利于油酸甲酯。
