不同干燥方法处理的新疆小芦苇在绵羊瘤胃内动态降解的研究

选用4只装有瘤胃瘘管的成年阿勒泰绵羊，每日正常饲喂配合日粮和玉米秸秆粗饲料，自由饮水。研究不同干燥方法对各生育期新疆小芦苇的干物质、粗蛋白质及中性洗涤纤维和酸性洗涤纤维在绵羊瘤胃内的动态降解率的影响。试验结果表明：①干燥速度快，原料的营养成分保存较好，其降解率也较高，晒干的普遍要比阴干的高（P＜0.05）；②生育期越早，原料的营养价值也较高，尤其是粗蛋白质等容易吸收的营养物质降解率高，NDF和ADF的降解率在开花期和结实期里比较高（P＞0.05）；③干物质的降解率以12 h为转折点，粗蛋白质则是在4 h达到90%左右的降解率，中性洗涤纤维和酸性洗涤纤维的平均降解率上升趋势比较平缓（P＞0.05），相互间差异不显著（抽穗期除外）。

Study on the Dynamic Degeneration of Different Dry-treated Xinjiang Small Reed in the Sheep Rumen

Four Aletai adult sheep with permanent cannula were chose, the total mixed ration (TMR) and the corn straw were normal feed every day , free drinking water. The different dry method were studied to the influence of dynamic degeneration rate in sheep rumen the various periods of duration Xinjiang small reed’s dry material, the crude protein ,the neutral detergent fiber (NDF) and the acid detergent fiber(ADF).The results showed that: ① The drying velocity is quick preservation of raw material nutrient were high, its degeneration rate is also high. Generally, natural dry is more than natural shade dry(P<0.05). ②In the early growing periods, the nutritional value of raw material is also more high, particularly the CP, the NDF and the ADF degeneration rate is quite high in the florescence and the solid time (P>0.05); ③Degradation rate of dry matter take 12 h as the turning point, The degeneration rat of crude protein arrives at 90% in four hour. Degradation rate of, the neutral detergent fiber (NDF) and the acid detergent fiber(ADF) , The increasing tendency relatively slow （P＞0.05），there was no significant difference(except heading date).