Jentsch W, Schiemann R, Wittenburg H, Hoffmann L
Arch Tierernahr. 1978 Jun;28(6):397-406. doi: 10.1080/17450397809426820.
A total of 59 complete metabolic periods of adult sheep were used to compare energy balance and energy utilization of rations containing 45, 60 and 99% of straw previously subjected to different treatments. In addition, some indices of rumen physiology were determined. The straw was fed in the following forms: chopped, chopped and treated with 6% sodium hydroxide, pelleted with and without NPN-addition (ammonium bicarbonate and/or urea) during the pelleting process. Notwithstanding pressing temperatures above 90 degrees C during compaction, the addition of NPN-compounds did not result in increased digestibility. The NaOH-treatment of the straw increased the energy digestibility of the ration containing 45% straw by 5 to 6 digestibility units. All experiments revealed a higher energy balance and, consequently, a higher energy utilization than could be expected from calculations on the basis of equations derived from earlier experiments with adult sheep. The variations are discussed under the aspect of energetic feed evaluation and with regard to consequence for the efficient use of straw in rations for ruminants.
总共使用了59个成年绵羊的完整代谢周期，以比较含有45%、60%和99%经不同处理的秸秆的日粮的能量平衡和能量利用情况。此外，还测定了一些瘤胃生理学指标。秸秆以以下形式投喂：切碎的、切碎并用6%氢氧化钠处理的、在制粒过程中添加和不添加非蛋白氮（碳酸氢铵和/或尿素）制粒的。尽管在压实过程中压制温度高于90摄氏度，但添加非蛋白氮化合物并未提高消化率。秸秆的氢氧化钠处理使含有45%秸秆的日粮的能量消化率提高了5至6个消化率单位。所有实验都表明，与根据早期成年绵羊实验得出的方程式计算预期的结果相比，能量平衡更高，因此能量利用率也更高。从能量饲料评价的角度以及对反刍动物日粮中秸秆高效利用的影响方面讨论了这些差异。
