Laboratory of Animal Production System, Graduate School of Agriculture, Hokkaido University, Kita, Sapporo, Japan.
Anim Sci J. 2012 Sep;83(9):650-5. doi: 10.1111/j.1740-0929.2011.01003.x. Epub 2012 Feb 10.
In vitro gas production (GP) method was used to investigate associative effects on ruminal digestion when grains (corn or barley) were supplemented to spring pasture and autumn pasture. Pasture (75%) was incubated with 25% corn or barley and gas production was monitored up to 96 h. After incubation, the residues were used to determine dry matter and organic matter digestibility (DMD and OMD). Gas production parameters were analyzed by applying a single exponential equation. Organic matter effective degradability (OMED) was determined from GP parameters and OMD. The positive associative effects on the rate of GP, DMD, OMD and OMED were observed when spring pasture was incubated with corn. However, similar effects were not observed in a barley mixture. However, for autumn pasture, both corn and barley mixtures showed positive associative effects on rate of GP, OMD and OMED. The results of this study indicated that supplementation of corn would be better than barley for spring pasture with high water-soluble carbohydrate contents, whereas both grain supplementations were effective to obtain positive associative effects on the rate of GP and OMED for autumn pasture with high cell wall content.
采用体外产气法研究了在春季牧草和秋季牧草中添加谷物（玉米或大麦）对瘤胃消化的联合效应。牧草（75%）与 25%的玉米或大麦混合培养，并监测 96 小时内的气体产生情况。培养结束后，用残渣测定干物质和有机物消化率（DMD 和 OMD）。通过应用单指数方程分析产气参数。从 GP 参数和 OMD 确定有机物有效降解率（OMED）。当春季牧草与玉米混合培养时，观察到对 GP 速率、DMD、OMD 和 OMED 的正向联合效应。然而，在大麦混合物中没有观察到类似的效果。然而，对于秋季牧草，玉米和大麦混合物对 GP 速率、OMD 和 OMED 都表现出正向的联合效应。本研究结果表明，对于高水溶性碳水化合物含量的春季牧草，添加玉米比添加大麦更好，而对于高细胞壁含量的秋季牧草，两种谷物的添加都能有效地获得 GP 速率和 OMED 的正向联合效应。
