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本试验旨在研究饲喂氨化棉籽壳对塔里木马鹿瘤胃内环境指标及血清尿素氮含量的影响,以期为塔里木马鹿对氨化饲料的合理利用提供理论依据。选用3只安装有永久性瘤胃瘘管的塔里木马鹿作为试验动物,采用配对试验设计(饲喂氨化棉籽壳前和饲喂氨化棉籽壳后),分2期进行,前期饲喂含未氨化棉籽壳(1 kg)的饲粮,后期饲喂用氨化棉籽壳全部替换掉未氨化棉籽壳的饲粮。每期试验分为预试期和正试期,预试期7 d,正试期15 d。结果显示:饲喂氨化棉籽壳后,塔里木马鹿瘤胃液p H、氨态氮浓度、微生物蛋白含量和血清尿素氮含量均显著或极显著高于饲喂氨化棉籽壳前(P<0.05或P<0.01),乙酸、丁酸和总挥发性脂肪酸浓度显著或极显著低于饲喂氨化棉籽壳前(P<0.05或P<0.01)。饲喂氨化棉籽壳前、后每只塔里木马鹿每天的饲料成本分别为5.55和5.04元,饲喂后比饲喂前低0.51元。由此可见,塔里木马鹿对氨化棉籽壳有很强的适应能力,氨化棉籽壳在塔里木马鹿饲粮中的应用可有效节约蛋白质饲料,提高粗饲料的利用效率,提高经济效益。
The purpose of this study was to investigate the effect of ammoniated cotton seed hulls on rumen internal environment and serum urea nitrogen content of Tarim deer, in order to provide a theoretical basis for the rational utilization of ammoniated feed by Tarim Red deer. Three Tarim deer with permanent rumen fistulae were used as experimental animals. The experiment was conducted in a paired experimental design (before feeding ammonized cotton seed hulls and after feeding ammonized cottonseed hulls) in two stages. The pre-feeding was carried out with non-ammonia Cotton seed hulls (1 kg) of the diet, post-feeding with ammoniated cottonseed shell completely replace the non-ammonized cottonseed diet. Each test is divided into pre-test period and positive test period, pre-test period of 7 d, positive test period of 15 d. The results showed that p H, ammonia nitrogen concentration, microbial protein content and serum urea nitrogen content of rumen mucosa were significantly higher than those fed ammoniated cotton seed hulls (P <0.05) Or P <0.01). The concentrations of acetic acid, butyric acid and total volatile fatty acids were significantly or extremely significantly lower than those before feeding ammoniated cotton seed hulls (P <0.05 or P <0.01). Feeding ammoniated cottonseed shell before and after each Tarim red deer daily feed costs were 5.55 and 5.04 yuan, 0.51 yuan lower than before feeding after feeding. Thus, Tarim red deer on the ammoniated cotton seed hulls have a strong adaptability, ammoniated cottonseed shell in Tarim Red deer feedstuffs can effectively save protein feed, improve the utilization efficiency of roughage and improve economic efficiency.